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    In Press

Yong, J.R., Silder, A., Delp, S.L. Differences in muscle activity between natural forefoot and rearfoot strikers during running. Journal of Biomechanics, in press. (Download PDF file)

Wisdom, K.M., Delp, S.L., Kuhl, E. Use it or lose it: multiscale skeletal muscle adaptation to mechanical stimuli. Biomechanics and Modeling in Mechanobiology, in press. (Download PDF file)

DeMers, M.S., Pal, S., Delp, S.L. Changes in tibiofemoral forces due to variations in muscle activity during walking. Journal of Orthopaedic Research, in press. (Download PDF file)

Cosgrove, B.D., Gilbert, P.M., Porpiglia, E., Mourkioti, F., Lee, S.P., Corbel, S.Y., Llewellyn, M.E., Delp, S.L., Blau, H.M. Rejuvenation of the muscle stem cell population restores strength to injured aged muscles. Nature Medicine, in press. (Download PDF file)

2014

Iyer, S.M., Delp, S.L. Optogenetic Regeneration. Science, vol 344, pp 44-45. (Download PDF file)

Iyer, S.M., Montgomery, K.L., Towne, C., Lee, S.Y., Ramakrishnan, C., Deisseroth, K., Delp, S.L. Virally mediated optogenetic excitation and inhbition of pain in freely moving nontransgenic mice. Nature Biotechnology, vol 32, pp 274-278. (Download PDF file)

Scholz, A., Stavness, I., Sherman, M., Delp, S., Kecskemethy, A. Improved Muscle Wrapping Algorithms Using Explicit Path-Error Jacobians, Computational Kinematics. Edited by F. Thomas and A. Perez Gracia, Spring Netherlands, pp 395-403. (Download PDF file)

Delp, S.L. Studying Circuits with Therapy in Mind: Therapy for the Periphery. Cell, vol 156, pp 862. (Download PDF file)

2013

Gerus, P., Sartori, M., Besier, T.F., Fregly, B.J., Delp, S.L., Banks, S.A., Pandy, M.G., D'Lima, D.D., Lloyd, D.G. Subject-specific knee joint geometry improves predictions of medial tibiofemoral contact forces. Journal of Biomechanics, vol 46, pp 2778-2786. (Download PDF file)

Liske, H., Qian, X., Anikeeva, P., Deisseroth, K., Delp, S. Optical control of neuronal excitation and inhibition using a single opsin protein, ChR2. Scientific Reports, vol 3 . (Download PDF file)

Towne, C., Montgomery, K.L., Iyer, S.M., Deisseroth, K., Delp, S.L. Optogenetic control of targeted peripheral axons in freely moving animals. PLoS ONE, vol 8. (Download PDF file)

Cromie, M.J., Sanchez, G.N., Schnitzer, M.J., Delp, S.L. Sarcomere lengths in human extensor carpi radialis brevis measured by microendoscopy. Muscle & Nerve, vol 8, pp 286-292. (Download PDF file)

Shull, P.B., Silder, A., Shultz, R., Dragoo, J.L., Besier, T.F., Delp, S.L., Cutkosky, M.R. Six-week gait retraining program reduces knee adduction moment, reduces pain, and improves function for individuals with medial compartment knee osteoarthritis. Journal of Orthopaedic Research, vol 31, pp 1020-1025. (Download PDF file)

Hamner, S.R., Seth, A., Steele, K.M., Delp, S.L. A rolling constraint reproduces ground reaction forces and moments in dynamic simulations of walking, running, and crouch gait. Journal of Biomechanics, vol 46, pp 1772-1776. (Download PDF file)

Arnold, E.M., Hamner, S.R., Seth, A., Millard, M., Delp, S.L. How muscle fiber lengths and velocities affect muscle force generation as humans walk and run at different speeds. Journal of Experimental Biology, vol 216, pp 2150-2160. (Download PDF file)

Liske, H., Towne, C., Anikeeva, P., Zhao, S., Feng, G., Deisseroth, K., Delp, S. Optical inhibition of motor nerve and muscle activity in vivo. Muscle & Nerve, vol 47, pp 916-921. (Download PDF file)

Steele, K.M., Seth, A., Hicks, J.L., Schwartz, M.H., Delp, S.L. Muscle contributions to vertical and fore-aft accelerations are altered in subjects with crouch gait. Gait and Posture, vol 38, pp 86-91. (Download PDF file)

Millard, M., Uchida, T., Seth, A., Delp, S.L. Flexing Computational Muscle: Modeling and Simulation of Musculotendon Dynamics. Journal of Biomechanical Engineering, vol 135. (Download PDF file)

Besier, T.F., Draper, C., Pal, S., Fredericson, M., Gold, G., Delp, S., Beaupre, G. Imaging and Musculoskeletal Modeling to Investigate the Mechanical Etiology of Patellofemoral Pain, In Anterior Knee Pain and Patellar Instability. Edited by V. Sanchis-Alfonso. (Download PDF file)

Hamner, S.R., Delp, S.L. Muscle contributions to fore-aft and vertical body mass center accelerations over a range of running speeds. Journal of Biomechanics, vol 46, pp 780-787. (Download PDF file)

Shull, P.B., Shultz, R., Silder, A., Dragoo, J.L., Besier, T.F., Cutkosky, M.R., Delp, S.L. Toe-in gait reduces the first peak knee adduction moment in patients with medial compartment knee osteoarthritis. Journal of Biomechanics, vol 46, pp 122-128. (Download PDF file)

Kinney, A.L., Besier, T.F., Silder, A., Delp, S.L., D'Lima, D.D., Fregly, B.J. Changes in in vivo knee contact forces through gait modification. Journal of Orthopaedic Research, vol 31, pp 434-440. (Download PDF file)

Pal, S., Besier, T.F., Beaupre, G.S., Fredericson, M., Delp, S.L., Gold, G.E. Patellar maltracking is prevalent among patellofemoral pain subjects with patella alta: an upright, weightbearing MRI study. Journal of Orthopaedic Research, vol 31, pp 448-457. (Download PDF file)

2012

Webb, J.D., Blemker, S.S., Delp, S.L. 3D finite element models of shoulder muscles for computing lines of actions and moment arms. Computer Methods in Biomechanics and Biomedical Engineering, pp 1-9. (Download PDF file)

John, C.T., Anderson, F.C., Higginson, J.S., Delp, S.L. Stabilisation of walking by intrinsic muscle properties revealed in a three-dimensional muscle-driven simulation. Computer Methods in Biomechanics and Biomedical Engineering, pp 1-12. (Download PDF file)

Steele, K.M., van der Krogt, M.M., Schwartz, M.H., Delp, S.L. How much strength is required to walk in a crouch gait? Journal of Biomechanics, vol 45, pp 2564-2569. (Download PDF file)

Draper, C.E., Quon, A., Fredericson, M., Besier, T.F., Delp, S.L., Beaupre, G.S., Gold, G.E. Comparison of MRI and 18F-NaF PET/CT in patients with patellofemoral pain. Journal of Magnetic Resonance Imaging, vol 36, pp 928-932. (Download PDF file)

Chen, C.A., Chen, W., Goodman, S.B., Hargreaves, B.A., Koch, K.M., Lu, W., Brau, A.C., Draper, C.E., Delp, S.L., Gold, G.E. New MR imaging methods for metallic implants in the knee: artifact correction and clinical impact. Journal of Magnetic Resonance Imaging, vol 33, pp 1121-1127. (Download PDF file)

Draper, C.E., Fredericson, M., Gold, G.E., Besier, T.F., Delp, S.L., Beaupre, G.S., Quon A. Patients with patellofemoral pain exhibit elevated bone metabolic activity at the patellofemoral joint. Journal of Orthopaedic Research, vol 30, pp 209-213. (Download PDF file)

John, C.T., Seth, A., Schwartz, M.H., Delp, S.L. Contributions of muscles to mediolateral ground reaction force over a range of walking speeds. Journal of Biomechanics, vol 45, pp 2438-2443. (Download PDF file)

Steele, K.M., Damiano, D.L., Eek, M.N., Unger, M., Delp, S.L. Characteristics associated with improved knee extension after strength training for individuals with cerebral palsy and crouch gait. Journal of Pediatric Rehabilitation Medicine, vol 5, pp 99-106. (Download PDF file)

Wang, J.M., Hamner, S.R., Delp, S.L., Koltun, V. Optimizing locomotion controllers using biologically-based actuators and objectives. ACM Transactions on Graphics (Proc. SIGGRAPH 2012), vol 31. (Download PDF file)

Silder, A., Besier, T., Delp, S.L. Predicting the metabolic cost of incline walking from muscle activity and walking mechanics. Journal of Biomechanics, vol 45, pp 1942-49. (Download PDF file)

van der Krogt, M.M., Delp, S.L., Schwartz, M.H. How robust is human gait to muscle weakness? Gait & Posture, vol 36, pp 113-119. (Download PDF file)

Steele, K.M., DeMers, M.S., Schwartz, M.H., Delp, S.L. Compressive tibiofemoral force during crouch gait. Gait & Posture, vol 35, pp 556-560. (Download PDF file)

Pal, S., Besier, T.F., Draper, C.E., Fredericson, M., Gold, G.E, Beaupre, G.S., Delp, S.L. Patellar tilt correlates with vastus lateralis:vastus medialis activation ratio in maltracking patellofemoral pain patients. Journal of Orthopaedic Research, vol 30, pp 927-933. (Download PDF file)

Fregly, B.J., Besier, T.F., Lloyd, D.G., Delp, S.L., Banks, S.A., Pandy, M.G., D'Lima, D.D. Grand challenge competition to predict in vivo knee loads. Journal of Orthopaedic Research, vol 30, pp 503-513. (Download PDF file)

Delp, S.L., Ku, J.P., Pande, V.S., Sherman, M.A., Altman, R.B. Simbios: an NIH national center for physics-based simulation of biological structures. Journal of the American Medical Informatics Association, vol 19, pp 186-189. (Download PDF file)

2011

Hicks, J.L., Delp, S.L., Schwartz, M.H. Can biomechanical variables predict improvement in crouch gait? Gait and Posture, vol 34, pp 197-201. (Download PDF file)

Besier, T.F., Draper, C., Pal, S., Fredericson, M., Gold, G., Delp, S., Beaupré, G. Imaging and musculoskeletal modeling to investigate the mechanical etiology of patellofemoral pain. Anterior Knee Pain and Patellar Instability, Edited by V. Sanchis-Alfonso, ch. 20, pp 269-286. (Download PDF file)

Reinbolt, J.A., Seth, A., Delp, S.L. Simulation of human movement: applications using OpenSim. Procedia IUTAM, vol 2, pp 186-198. (Download PDF file)

Seth, A., Sherman, M.A., Reinbolt, J.A., Delp, S.L. OpenSim: a musculoskeletal modeling and simulation framework for in silico investigations and exchange. Procedia IUTAM, vol 2, pp 212-232. (Download PDF file)

Sherman, M.A., Seth, A., Delp, S.L. Simbody: multibody dynamics for biomedical research. Procedia IUTAM, vol 2, pp 241-261. (Download PDF file)

Keenan, K.E., Besier, T.F., Pauly, J.M., Han, E., Rosenberg, J., Smith, R.L., Delp, S.L., Beaupré, G.S., Gold, G.E. Prediction of glycosaminoglycan content in human cartilage by age, T1rho and T2 MRI. Osteoarthritis and Cartilage, vol 19, pp 171-179. (Download PDF file)

Arnold, E.M., Delp, S.L. Fibre operating lengths of human lower limb muscles during walking. Philosophical Transactions of the Royal Society B, vol 366, pp 1530-1539. (Download PDF file)

Higham, T.E., Biewener, A.A., Delp, S.L. Mechanics, modulation and modelling: how muscles actuate and control movement. Philosophical Transactions of the Royal Society B, vol 366, pp 1463-1465. (Download PDF file)

Pal, S., Draper, C.E., Fredericson, M., Gold, G.E., Delp, S.L., Beaupre, G.S., Besier, T.F. Patellar maltracking correlates with vastus medialis activation delay in patellofemoral pain patients. American Journal of Sports Medicine, vol 39, pp 590-598. (Download PDF file)

Draper, C.E., Besier, T.F., Fredericson, M., Santos, J.M., Beaupre, G.S., Delp, S.L., Gold, G.E. Differences in patellofemoral kinematics between weight-bearing and non-weight-bearing conditions in patients with patellofemoral pain. Journal of Orthopaedic Research, vol 29, pp 312-317. (Download PDF file)

2010

Sacco, A., Mourkioti, F., Tran, R., Choi, J., Llewellyn, M., Kraft, P., Shkreli, M., Delp, S., Pomerantz, J., Artandi, S., Blau, H. Short Telomeres and Stem Cell Exhaustion Model Duchenne Muscular Dystrophy in mdx/mTR Mice. Cell, vol 143, pp 1059-1071. (Download PDF file)

Damiano, D.L., Arnold, A.S., Steele, K.M., Delp, S.L. Can strength training predictably improve gait kinematics? A pilot study on the effects of hip and knee extensor strengthening on lower-extremity alignment in cerebral palsy. Physical Therapy, vol 90, pp 269-279. (Download PDF file)

Llewellyn, M.E., Thompson, K.R., Deisseroth, K., Delp, S.L. Orderly recruitment of motor units under optical control in vivo, Nature Medicine, vol 16, pp 1161-1165 (Download PDF file)

Hamner, S.R., Seth, A., Delp, S.L. Muscle contributions to propulsion and support during running, Journal of Biomechanics, vol 43, pp 2709-2716. (Download PDF file)

Steele, K.M., Seth, A., Hicks, J.L., Schwartz, M.S., Delp, S.L. Muscle contributions to support and progression during single-limb stance in crouch gait. Journal of Biomechanics, vol 43, pp 2099-2105. (Download PDF file)

Vasavada, A.N., Ward, S., Delp, S.L., Lieber, R.L. Architectural design and function of human back muscles, In The Spine, Edited by Rothman and Simeone. (Download PDF file)

Seth, A., Sherman, M., Eastman, P., Delp, S. Minimal formulation of joint motion for biomechanisms, Nonlinear Dyn, vol 62, pp 291-303. (Download PDF file)

Fox, M.D., Delp, S.L. Contributions of muscles and passive dynamics to swing initiation over a range of walking speeds, Journal of Biomechanics, vol 43, pp 1450-1455. (Download PDF file)

Agarwal-Harding, K.J., Schwartz, M.H., Delp, S.L. Variations of hamstrings lengths and velocities with walking speed, Journal of Biomechanics, vol 43, pp 1522-1526. (Download PDF file)

Arnold, E.M., Ward, S.R., Lieber, R.L., Delp, S.L. A model of the lower limb for analysis of human movement, Annals of Biomedical Engineering, vol 38, pp 269-279. (Download PDF file)

2009

Parker, D., Bryant, Z., Delp, S.L. Coarse-grained structural modeling of molecular motors using multibody dynamics, Cellular and Molecular Bioengineering , vol 2, pp 366-374. (Download PDF file)

Liao, J.C., Elting, M.W., Delp, S.L., Spudich, J.A., Bryant, Z. Engineered myosin VI motors reveal minimal structural determinants of directionality and processivity. J Mol Biol, vol 392, pp 863-867. (Download PDF file)

Khatib, O., Demircan, E., De Sapio, V., Sentis, L., Besier, T., Delp, S.. Robotics-based synthesis of human motion, J of Physiology, vol 103, pp 211-219. (Download PDF file)

Chen, C.A., Lu, W., John, C.T., Hargreaves, B.A., Reeder, S.B., Delp, S.L., Siston, R.A., Gold, G.E. Multiecho IDEAL Gradient-Echo Water-Fat Separation for rapid assessment of cartilage volume at 1.5T: Initial Experience, Radiology, vol 252, pp 561- 567. (Download PDF file)

Keenan, K.E., Kourtis, L.C., Besier, T.F., Lindsey, D.P., Gold, G.E., Delp, S.L., Beaupre, G.S. New resource for the computation of cartilage biphasic material properties with the interpolant response surface method, Computer Methods in Biomechanics and Biomedical Engineering, vol 12, pp 415-422. (Download PDF file)

Reinbolt, J.A., Fox, M.D., Schwartz, M.H., Delp, S.L. Predicting outcomes of rectus femoris transfer surgery, Gait & Posture, vol 30, pp 100-105. (Download PDF file)

Besier, T.F., Fredericson, M., Gold, G.E., Beaupre, G.S., Delp, S.L. Knee muscle forces during walking and running in patellofemoral pain patients and pain-free controls. Journal of Biomechanics, vol 42, pp 898-905. (Download PDF file)

Hicks, J.L., Schwartz, M.H., Delp, S.L. Modeling and Simulation of Walking, In Diagnosis and Management of Movement Abnormalities in Cerebral Palsy. Edited by J.R. Gage and M. Schwartz, Cambridge Press. (Download PDF File)

Draper, C.E., Besier, T.F., Santos, J.M., Jennings, F., Fredericson, M., Gold, G.E., Beaupre, G.S., Delp, S.L. Using real-time MRI to quantify altered joint kinematics in subjects with patellofemoral pain and to evaluate the effects of a patellar brace or sleeve on joint motion. Journal of Orthopaedic Research, vol 27, pp 571-577. (Download PDF file)

Fox, M.D., Reinbolt, J.A., Ounpuu, S., Delp, S.L. Mechanisms of improved knee flexion after rectus femoris transfer surgery. Journal of Biomechanics, vol 42, pp 614-619. (Download PDF file)

Jonkers, I., Delp, S., Patten, C. Capacity to increase walking speed is limited by impaired hip and ankle power generation in lower functioning persons post-stroke. Gait & Posture, vol 29, pp 129-137. (Download PDF file)

2008

Liu, M.Q., Anderson, F.C., Schwartz, M.H., Delp, S.L. Muscle contributions to support and progression over a range of walking speeds. Journal of Biomechanics, vol 41, pp 3243-3252. (Download PDF file)

Besier, T.F., Gold, G.E., Delp, S.L., Fredericson, M., Beaupre, G.S. The influence of femoral internal and external rotation on cartilage stress within the patellofemoral joint. Journal of Orthopaedic Research, vol 26, pp 1627-1635. (Download PDF file)

Cromie, M.J., Siston, R.A., Giori, N.J., Delp, S.L. Posterior cruciate ligament removal contributes to abnormal knee motion during posterior stabilized total knee arthroplasty. Journal of Orthopaedic Research, vol 26, pp 1494-1499. (Download PDF file)

De Sapio, V., Khatib, O., Delp, S.L. Least action principles and their application to constrained and task-level problems in robotics and biomechanics. Multibody System Dynamics, vol 19, pp 303-322. (Download PDF file)

Siston, R.A., Cromie, M.J., Gold, G.E., Goodman, S.B., Delp, S.L., Maloney, W.J., Giori, N.J. Averaging different alignment axes improves femoral rotational alignment in computer-navigated total knee arthroplasty. Journal of Bone and Joint Surgery, vol 90, pp 2098-2104. (Download PDF file)

Llewellyn, M.E., Barretto, R.P.J., Delp, S.L., Schnitzer, M.J. Minimally invasive high-speed imaging of sarcomere contractile dynamics in mice and humans. Nature, vol 454, pp 784 - 788. (Download PDF file)

Reinbolt, J.A., Fox, M.D., Arnold, A.S., Ounpuu, S., Delp, S.L. Importance of preswing rectus femoris activity in stiff-knee gait. Journal of Biomechanics, vol 41, pp 2362-2369. (Download PDF file)

Schmidt, J.P., Delp, S.L., Sherman, M.A., Taylor, C.A., Pande, V.S., Altman, R.B. The simbios national center: Systems biology in motion. Proceedings of the IEEE, vol 98, pp 1266- 1280. (Download PDF file)

Draper, C.E., Santos, J.M., Kourtis, L.C., Besier, T.F., Fredericson, M., Beaupre, G.S., Gold, G.E., Delp, S.L. Feasibility of using real-time MRI to measure joint kinematics in 1.5T and open-bore 0.5T systems. Journal of Magnetic Resonance Imaging, vol 28, pp 158-166. (Download PDF file)

Hicks, J.L., Schwartz, M.H., Arnold, A.S., Delp, S.L. Crouched postures reduce the capacity of muscles to extend the hip and knee during the single-limb stance phase of gait. Journal of Biomechanics, vol 41, pp 960-967. (Download PDF file)

2007

Siston, R.A., Goodman, S.B., Delp, S.L., Giori, N.J. Coronal plane stability before and after total knee arthroplasty. Clinical Orthopaedics and Related Research, vol 463, pp 43-49. (Download PDF file)

Hicks, J., Arnold, A., Anderson, F., Schwartz, M., Delp, S. The effect of excessive tibial torsion on the capacity of muscles to extend the hip and knee during single-limb stance. Gait & Posture, vol 26, pp 546-552. (Download PDF file)

Holzbaur, K.R.S., Delp, S.L., Gold, G.E., Murray, W.M. Moment-generating capacity of upper limb muscles in healthy adults. Journal of Biomechanics, vol 40, pp 2442-2449. (Download PDF file)

Arnold, A.S., Thelen, D.G., Schwartz, M.H., Anderson, F.C., Delp, S.L. Muscular coordination of knee motion during the terminal-swing phase of normal gait. Journal of Biomechanics, vol 40, 3314 - 3324, 2007. (Download PDF file)

Arnold, A.S., Schwartz, M.H., Thelen, D.G., Delp, S.L. Contributions of muscles to terminal-swing knee motions vary with walking speed. Journal of Biomechanics, vol 40, pp 3660 - 3671, 2007. (Download PDF file)

Delp, S.L., Anderson, F.C., Arnold, A.S., Loan, P., Habib, A., John, C.T., Guendelman, E., Thelan, D.G. OpenSim: Open-source software to create and analyze dynamic simulations of movement. IEEE Transactions on Biomedical Engineering , vol 55, pp 1940-1950, 2007. (Download PDF file)

Holzbaur, K.R.S., Murray, W.M., Gold, G.E., Delp, S.L. Upper limb muscle volumes in adult subjects. Journal of Biomechanics, vol 40, pp 742-749, 2007. (Download PDF file)

Siston, R.A., Giori, N.J., Goodman, S.B., Delp, S.L. Surgical navigation for total knee arthroplasty: A perspective. Journal of Biomechanics, vol 40, pp 728-735, 2007. (Download PDF file)

Liao, J.C., Spudich, J.A., Parker, D., Delp, S.L. Extending the absorbing boundary method to fit dwell-time distributions of molecular motors with complex kinetic pathways. PNAS, vol 104, pp 3171-3176, 2007. (Download PDF file)

Blemker, S.S., Asakawa, D.S., Gold, G.E., Delp, S.L. Image-based musculskeletal modeling: Applications, advances, and future opportunities. Journal of Magnetic Resonance Imaging, vol 25, pp 441-451, 2007. (Download PDF file)

2006

Arnold, A.S., Liu, M.Q., Schwartz, M.H., Ounpuu, S., Dias, L.S., Delp, S.L. Do the hamstrings operate at increased muscle-tendon lengths and velocities after surgical lengthening? Journal of Biomechanics, vol 39, pp 1498-1506, 2006. (Download PDF file)

Siston, R.A., Giori, N.J., Goodman, S.B., Delp, S.L. Intraoperative passive kinematics of osteoarthritic knees before and after total knee arthroplasty. Journal of Orthopaedic Research, vol 24, pp 1607- 1614, 2006. (Download PDF file)

Liu, M.Q., Anderson, F.C., Pandy, M.G., Delp, S.L. Muscles that support the body also modulate forward progression during walking. Journal of Biomechanics, vol 39, pp 2623-2630, 2006. (Download PDF file)

De Sapio, V., Khatib, O., Delp, S. Task-level approaches for the control of constrained multibody systems. Multibody System Dynamics, vol 16, pp 73-102, 2006. (Download PDF file)

Draper, C.E., Besier, T.F., Gold, G.E., Fredericson, M., Fiene, A., Beaupre, G.S., Delp, S.L. Is cartilage thickness different in young subjects with and without patellofemoral pain? Osteoarthritis and Cartilage, vol 14, pp 931-937, 2006. (Download PDF file)

Asakawa, D.S., Blemker, S.S., Gold, G.E., Delp, S.L. Dynamic magnetic resonance imaging of muscle function after surgery. Skeletal Radiol, 2006. (Download PDF file)

Ashby, B.M., Delp, S.L. Optimal control simulations reveal mechanisms by which arm movement improves standing long jump performance, Journal of Biomechanics, vol 39, pp 1726-1734, 2006. (Download PDF file)

Higginson, J.S., Zajac, F.E., Neptune, R.R., Kautz, S.A., Delp, S.L. Muscle contributions to support during gait in an individual with post-stroke hemiparesis. Journal of Biomechanics, vol 39, pp 1769-1777, 2006. (Download PDF file)

Blemker, S.S., Delp, S.L. Rectus femoris and vastus intermedius fiber excursions predicted by three-dimensional muscle models.Journal of Biomechanics, vol 39, pp1383-1391, 2006. (Download PDF file)

Arnold, A.S., Liu, M.Q., Schwartz, M.H., Ounpuu, S., Delp, S.L. The role of estimating muscle-tendon lengths and velocities of the hamstrings in the evaluation and treatment of crouch gait. Gait and Posture, vol 23, pp 273-281, 2006 . (Download PDF file)

Anderson, F.C., Arnold, A.S., Pandy, M.G., Goldberg, S.R., Delp, S.L. Simulation of Walking, In Human Walking, Williams and Wilkins, 3rd Edition, 2006. (Download PDF file)

Goldberg, S.R., Ounpuu, S., Arnold, A.S., Gage, J.R., Delp, S.L. Kinematic and kinetic factors that correlate with improved knee flexion following treatment for stiff-knee gait, Journal of Biomechanics, vol 39, pp 689-698, 2006. (Download PDF file)

Siston, R.A., Delp, S.L. Evaluation of a new algorithm to determine the hip joint center. Journal of Biomechanics, vol 39, pp 125–130, 2006. (Download PDF file)

Higginson, J.S., Zajac, F.E., Neptune, R.R., Kautz, S.A., Burgar, C.G., Delp, S.L. Effect of equinus foot placement and intrinsic muscle response on knee extension during stance. Gait and Posture, vol 23, pp. 32-36, 2006. (Download PDF file)

2005

Besier, T. F., Gold, G. E., Beaupré, G. S. & Delp, S. L. A modeling framework to estimate patellofemoral joint cartilage stress in-vivo. Medicine & Science in Sports and Exercise, vol 37, pp. 1924-1930, 2005. (Download PDF file)

Arnold, A.S., Liu, M.Q., Schwartz, M.H., Ounpuu, S., Dias., L.S., Delp, S.L., Do the hamstrings operate at increased muscle–tendon lengths and velocities after surgical lengthening? Journal of Biomechanics, vol 38, pp. 2181-2189, 2005. (Download PDF file)

Hutchinson, J.R., Anderson, F.C., Blemker, S.S., Delp, S.L. Analysis of hindlimb muscle moment arms in Tyrannosaurus rex using a three-dimensional musculoskeletal computer model: implications for stance, gait, and speed. Paleobiology, vol 31, pp. 676–701, 2005. (Download PDF file)

Siston, R.A., Patel, J.J, Gooidman, S.B., Delp, S.L., Giori, N.J. The Variability of Femoral Rotational Alignment in Total Knee Arthroplasty. Journal of Bone and Joint Surgery, vol 87, pp 2276-2280, 2005. (Download PDF file)

Siston, R.A., Daub, A.C., Giori, N.J., Goodman, S.B., Delp, S.L. Evaluation of Methods That Locate the Center of the Ankle for Computer-assisted Total Knee Arthroplasty. Clinical Orthopaedics and Related Research, vol 439, pp 129–135, 2005. (Download PDF file)

Arnold, A.S., Anderson, F.C. Pandy, M.G., Delp, S.L. Muscular contributions to hip and knee extension during the single limb stance phase of normal gait: a framework for investigating the causes of crouch gait. Journal of Biomechanics, vol 38, pp 2181-2189, 2005. (Download PDF file)

Holzbaur, K.R.S., Murray, W.M., Delp, S.L. A Model of the Upper Extremity for Simulating Musculoskeletal Surgery and Analyzing Neuromuscular Control. Annals of Biomedical Engineering, vol 33, pp 829–840, 2005. (Download PDF file)

Blemker, S.S., Delp, S.L. Three-Dimensional Representation of Complex Muscle Architectures and Geometries. Annals of Biomedical Engineering, vol 33, pp. 661–673, 2005. (Download PDF file)

De Sapio, S. Warren, J., Khatib, O., Delp, S. Simulating the task-level control of human motion: a methodology and framework for implementation. Visual Computer, vol 21, pp 289-302. (Download PDF file)

Besier, T.F., Draper, C.E., Gold, G.E., Beaupre, G.S., Delp, S.L. Patellofemoral joint contact area increases with knee flexion and weight-bearing. Journal of Orthopaedic Research, vol 23, pp 345–350, 2005. (Download PDF file)

Blemker, S.S., Pinsky, P.M., Delp, S.L. A 3D model of muscle reveals the causes of nonuniform strains in the biceps brachii. Journal of Biomechanics, vol 38, pp 657-665, 2005. (Download PDF file)

Arnold, A.S., Delp, S.L. Computer modeling of gait abnormalities in cerebral palsy: application to treatment planning. Theoretical Issues in Ergonomics Science, vol 6, pp 305–312, 2005. (Download PDF file)

2004

Arnold, A.S., and Delp, S. L., The role of musculoskeletal models in patient assessment and treatment.   In Treatment of Gait Problems in Cerebral Palsy, Edited by J.R. Gage, Cambridge Press, 2004. (Download PDF file)

Gold, G.E., Besier, T.F., Draper, C.E., Asakawa, D.S., Delp, S.L., Beaupre, G.S. Weight-Bearing MRI of patellofemoral joint cartilage contact area. Journal of Magnetic Resonance Imaging, vol 20, pp 526 - 530, 2004. (Download PDF file)

Goldberg, S.R., Anderson, F.C., Pandy, M.G., Delp, S.L. Muscles that influence knee flexion velocity in double support: implications for stiff-knee gait. Journal of Biomechanics, vol 37, pp 1189–1196, 2004. (Download PDF file)

Anderson, F.C., Goldberg, S.R., Pandy, M.G., Delp, S.L. Contributions of muscle forces and toe-off kinematics to peak knee flexion during the swing phase of normal gait: an induced position analysis. Journal of Biomechanics, vol 37, pp 731–737, 2004. (Download PDF file)

Asakawa, D.S., Blemker, S.S., Rab, G.T., Bagley, A., Delp, S.L. Three-dimensional muscle-tendon geometry after rectus femoris transfer. Journal of Bone and Joint Surgery, vol 86-A, pp 348-354, 2004. (Download PDF file)

Gold G., Asakawa, D., Blemker, S., Delp, S. L. Magnetic Resonance Imaging Findings After Rectus Femoris Transfer Surgery, Skeletal Radiology, vol. 33, pp. 34-40, 2004. (Download PDF file)

2003 (top)

Asakawa, D.S., Pappas, G.P. Blemker, S.S., Drace, J.E., Delp, S.L. Cine Phase-Contrast Magnetic Resonance Imaging as a Tool for Quantification of Skeletal Muscle Motion. Seminars in Musculoskeletal Radiology, vol 7, pp 287-295, 2003. (Download PDF file)

Asakawa, D.S., Nayak, D.S., Blemker S.S., Pauly, J.M., Nishimura, D.G., Delp, S.L. Real-time imaging of skeletal muscle velocity.Journal of Magnetic Resonance Imaging, vol 18, pp 734-739, 2003. (Download PDF file)

Saul, K.R. Murray, W.M., Hentz, V.R., Delp, S.L. Biomechanics of the Steindler Flexorplasty Surgery: A Computer Simulation Study. Journal of Hand Surgery , vol. 28A, pp 979-986, 2003. (Download PDF file)

Goldberg, S.R., Ounpuu, S., Delp, S.L. The importance of swing-phase initial conditions in stiff-knee gait. Journal of Biomechanics, vol. 36, pp. 1111-1116, 2003. (Download PDF file)

Thelen, D.G., Riewald, S.A., Asakawa, D.S., Sanger, T.D., Delp, S.L Abnormal Coupling of Knee and Hip Moments during Maximal Exertions in Person with Cerebral Palsy. Muscle & Nerve, vol. 27, pp. 486-493, 2003. (Download PDF file)

Thelen, D.G., Anderson, F.C., Delp, S.L. Generating dynamic simulations of movement using computed muscle control. Journal of Biomechanics, 36, 321–328, 2003. (Download PDF file)

2002 (top)

Asakawa, D.S., Blemker, S.S., Gold, G.E., Delp, S.L. In vivo motion of the rectus femoris muscle after tendon transfer surgery. Journal of Biomechanics, vol. 35, pp. 1029-1037, 2002. (Download PDF file)

Pappas, G.P, Asakawa, D.S., Delp, S.L., Zajac, F.E., Drace, J.E. Nonuniform shortening in the biceps brachii during elbow flexion. Journal of Applied Physiology, vol. 92, pp. 2381-238, 2002. (Download PDF file)

Asakawa, D.S., Pappas, G. P., Drace, J. E., Delp, S. L. Architecture of the biceps brachii characterized with ultrasound and MR. International Journal of Mechanics in Medicine and Biology, vol. 2, pp. 449-455, 2002. (Downloadf PDF file)

Murray, W. M., Buchanan, T.S., Delp, S.L. Scaling of peak moment arms of elbow muscles with dimensions of the upper extremity, Journal of Biomechanics, vol. 35, pp 19-26, 2002. (Download PDF file)

Vasavada, A.N., Peterson, B.W., Delp, S.L. Three-dimensional spatial tuning of neck muscle activation in humans. Experimental Brain Research, vol. 147, pp. 437-448, 2002. (Download PDF file)

2001 (top)

Arnold, A.S., Blemker, S.S., Delp, S.L. Evaluation of a deformable musculoskeletal model: application to planning muscle-tendon surgeries for crouch gait. Annals of Biomedical Engineering, vol. 29, pp. 1-11, 2001. (Download PDF file)

Vasavada, A.V., Li, S., Delp, S.L. Isometric strength of neck muscles in humans. Spine, vol. 26, pp. 1904-1909, 2001. (Download PDF file)

Arnold, A.S., Delp, S.L. Rotational moment arms of the medial hamstrings and adductors vary with femoral geometry and limb position: implications for treatment of internally-rotated gait. Journal of Biomechanics, vol. 34, pp. 437-447, 2001. (Download PDF file)

Delp, S.L, Suranarayanan, S., Murray, W.M., Uhlir, J., Triolo, R.J. Architecture of three major trunk muscles. Journal of Biomechanics, vol. 34, pp. 371-371, 2001. (Download PDF file)

Piazza, S.J., Delp, S.L. Three-dimensional dynamic simulation of total knee replacement motion during a stepup task, ASME Journal of Biomechanical Engineering, vol. 123, pp. 589-606, 2001. (Download PDF file)

2000 (top)

Delp, S.L., Loan, J.P. A computational framework for simulation and analysis of human and animal movement, IEEE Computing in Science and Engineering, vol. 2, n 5, pp. 46-55, 2000. (Download PDF file)

Arnold, A.S., Salinas, S., Asakawa, D.J., Delp, S.L. Accuracy of muscle moment arms estimated form MRI-based musculoskeletal models of the lower extremity. Computer Aided Surgery, vol. 5, pp. 108-119, 2000. (Download PDF file)

Arnold, A.S., Asakawa, D.J., Delp, S.L. Do the hamstrings and adductors contribute to excessive internal rotation of the hip in persons with cerebral palsy. Gait and Posture, Awarded Best Paper of 1999, vol. 11, pp. 181-190, 2000. (Download PDF file)

Murray, W. M., Buchanan, T.S., Delp, S.L. The isometric functional capacity of elbow muscles. Journal of Biomechanics, vol. 33, pp. 943-952, 2000. (Download PDF file)

Dhaher, Y.Y., Rymer, W. Z., Delp, S.L. The use of basis functions in modeling of joint articular surfaces: application to the knee joint. Journal of Biomechanics, vol. 33, pp. 901-909, 2000. (Download PDF file)

1999 (top)

Schmidt, D.J., Arnold, A.S., Carroll, N.C., Delp, S.L. Length changes of the hamstrings and adductors resulting from derotational osteotomies of the femur. Journal of Orthopaedic Research, vol. 17, pp. 279-285, 1999. (Download PDF file)

Delp, S.L., Hess, W. E., Hungerford, D.S., Jones, L.C. Variation of rotational moment arms with hip flexion. Journal of Biomechanics, vol. 23, pp. 493-501, 1999. (Download PDF file)

Delp. S.L., Loan, J. P., Robinson, C. B., Stulberg, S.D., Wong, A. Y. Computer Assisted Surgical Method US patent No. 5,871,018, 1999. (Download PDF file)

Herrmann, A., Delp, S.L. Moment arms and force-generating capacity of the extensor carpi ulnaris after transfer to the extensor carpi radialis brevis. Journal of Hand Surgery, vol. 24A, pp. 1083-1090, 1999. (Download PDF file)

1998 (top)

Delp, S.L., Arnold, A.S., Piazza, S.J. Graphics-based modeling and analysis of gait abnormalities. Biomedical Materials and Engineering, vol. 8, pp. 227-240,1998. (Download PDF file)

Delp, S.L., Stulberg, S.D., Davies, B., Picard, F., Leitner, F. Computer assisted knee replacement. Clinical Orthopaedics and Related Research, vol. 354, pp. 49-56, 1998. (Download PDF file)

Piazza, S.J., Delp, S.L., Stulberg, S.D., Stern, S.H. Posterior tilting of the tibial component decreases femoral rollback in posterior-substituting knee replacement. Journal of Orthopaedic Research, vol. 16, pp. 264-270, 1998. (Download PDF file)

Buchanan, T.S., Delp, S.L., Solbeck, J.A. Muscular resistance to varus and valgus loads at the elbow. ASME Journal of Biomechanical Engineering, vol. 120, pp. 634-639, 1998. (Download PDF file)

Medical Image Computing and Computer-Assisted Intervention, Lecture Notes in Computer Science, Springer-Verlag, New York, Edited by W. M. Wells, A. Colchester, S. Delp, (1256 pages), 1998. (Go to web site)

Vasavada, A.V., Li, S., Delp, S.L. Influence of muscle morphometry and moment arms on the moment-generating capacity of human neck muscles. Spine, vol. 23, pp. 412-422, 1998. (Download PDF file)

1997 (top)

Keshner, E.A., Statler, K.D., Delp, S.L. Kinematics of the freely moving head and neck in the cat. Experimental Brain Research, vol. 115, pp. 257-366, 1997. (Download PDF file)

Delp, S.L., Loan, J.P., Basdogan, C., Rosen, J.M. Surgical simulation: an emerging technology for emergency medical training. Presence: Teleoperators and Virtual Environments, vol. 6, pp. 147-159, 1997. (Download PDF file)

Gonzalez, R.V., Buchanan, T.S., Delp, S.L. How muscle architecture and moment arms affect wrist flexion-extension moments. Journal of Biomechanics, vol. 30, pp. 705-712, 1997. (Download PDF file)

Arnold, A.S., Komattu, A.V., Delp, S.L. Internal rotation gait: A compensatory mechanism to restore abduction capacity decreased by bone deformity? Developmental Medicine and Child Neurology, vol. 39, pp. 40-44, 1997. (Download PDF file)

Riewald, S.A., Delp, S.L. The action of the rectus femoris muscle following distal tendon transfer: Does it generate a knee flexion moment? Developmental Medicine and Child Neurology, vol. 39, pp. 99-105, 1997. (Download PDF file)

Delp. S.L., Loan, J. P., Robinson, C. B., Stulberg, S.D., Wong, A. Y. Computer Assisted Surgical System US patent No. 5,682,886, 1997. (Download PDF file)

1996 (top)

Delp, S.L., Wixson, R.L., Kocmond, J.H, Komattu, A.V. How superior placement of the joint center in total hip arthroplasty affects the abductor muscles. Clinical Orthopaedics and Related Research, vol. 328, pp. 137-146, 1996. (Download PDF file)

Delp, S.L., Grierson, A.E., Buchanan, T.S. Maximum Isometric moments generated by the wrist muscles in flexion-extension and radial-ulnar deviation. Journal of Biomechanics, vol. 29, pp. 1371-1376, 1996. (Download PDF file)

Free, S.A., Delp, S.L. Effects of trochanteric transfer on the moment arms, lengths, and force-generating capacities of the hip abductors, Journal of Orthopaedic Research, vol. 14, pp. 245-250, 1996. (Download PDF file)

Piazza, S.J., Delp S.L. Influence of muscles on knee flexion during the swing phase of normal gait. Journal of Biomechanics, vol. 29, pp. 723-733, 1996. (Download PDF file)

Delp, S.L., Arnold, A.S., Speers, R.A., Moore, C. Hamstrings and psoas lengths during normal and crouch gait: implications for muscle-tendon surgery. Journal of Orthopaedic Research, vol. 14, pp. 144-151,1996. (Download PDF file)

1995 (top)

Delp, S.L., Kocmond, J.H., Stern, S.H. Trade-offs between motion and stability in posterior substituting knee arthroplasty design. Journal of Biomechanics, vol. 28, pp. 1155-1166, 1995. (Download PDF file)

Delp, S.L., Statler, K., Carroll, N.C. Preserving plantarflexion strength after surgical treatment for contracture of the triceps surae: a computer simulation study. Journal of Orthopaedic Research, vol. 13, pp. 96-104, 1995. (Download PDF file)

Delp, S.L., Loan, J.P. A software system to develop and analyze models of musculoskeletal structures. Computers in Biology and Medicine, vol. 25, pp. 21-34, 1995. (Download PDF file)

Kocmond, J.H., Delp, S.L., Stern, S.H. Stability and range of motion of Insall-Burstein condylar prostheses: a computer simulation study. Journal of Arthroplasty, vol. 10, pp. 383-388, 1995. (Download PDF file)

Murray, W.A., Delp, S.L., Buchanan, T.S. Variation of muscle moment arms with elbow and forearm position. Journal of Biomechanics, vol. 28, pp. 513-525, 1995. (Download PDF file)

1994 (top)

Delp, S.L., Komattu, A.V., Wixson, R.L. Superior displacement of the hip in total joint replacement: effects of prosthetic neck length, neck-stem angle, and anteversion angle on the moment-generating capacity of the muscles. Journal of Orthopaedic Research, vol. 12, pp. 860-870, 1994. (Download PDF file)

Delp, S.L., Ringwelski, D., Carroll, N.C. Transfer of the rectus femoris: effects of transfer site on moment arms about the knee and hip. Journal of Biomechanics, vol. 27, pp. 1201-1211, 1994. (Download PDF file)

Vasavada, A.N., Delp, S.L., Maloney, W.J., Schurman, D.J., Zajac, F.E. Compensating for changes in muscle length in total hip arthroplasty: effects on the moment-generating capacity of the muscles. Clinical Orthopaedics and Related Research, vol. 302, pp. 121-133, 1994. (Download PDF file)

1993 (top)

Delp, S.L., Maloney, W. J. Effects of hip center location on the moment-generating capacity of muscles. Journal of Biomechanics, vol. 26, pp. 485-499, 1993. (Download PDF file)

1992 (top)

Delp, S.L., Zajac, F.E. Force- and moment-generating capacity of lower-limb muscles before and after tendon lengthening. Clinical Orthopaedics and Related Research, vol. 284, pp. 247-259, 1992. (Download PDF file)

1990 (top)

Delp, S.L., Bleck E.E., Zajac, F.E., Bollini, G. Biomechanical analysis of the Chiari pelvic osteotomy: preserving hip abductor strength. Clinical Orthopaedics and Related Research, vol. 254, pp. 189-198, 1990. (Download PDF file)

Delp, S.L., Loan, J.P., Hoy, M.G., Zajac, F.E., Topp E.L., Rosen, J.M. An interactive graphics-based model of the lower extremity to study orthopaedic surgical procedures. IEEE Transactions on Biomedical Engineering, vol. 37, pp. 757-767, 1990. (Download PDF file)

Delp. S.L. Surgery simulation: A computer-graphics system to analyze and design musculoskeletal reconstructions of the lower limb. Stanford University, Ph.D. Thesis, 1990. (Download PDF file)

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