Research Interests
I am interested in understanding how humans use muscles in walking. How do muscles function during normal walking? How do these functions change during abnormal walking (e.g., walking after a stroke or with cerebral palsy)? Do these functions differ between individual patients? A better understanding of how muscles influence gait deviations may help clinicians select appropriate treatments for these patients.

Degrees
Ph.D. in Mechanical Engineering, Stanford University, 2009
M.S. in Biomedical Engineering, Northwestern University, 2001
B.S. in Biomedical Engineering, Case Western Reserve University, 1998

Honors and Awards
Young Investigator Award, Gait and Clinical Movement Analysis Society, 2005

Pre-doctoral Associated Health Rehabilitation Research Fellowship, Department of Veterans Affairs

Whitaker Foundation Graduate Fellowship

Representative Publications
Liu, M.Q., Anderson, F.C., Pandy, M.G., and Delp, S.L. (in press) Muscles that support the body also modulate forward progression during
walking. Journal of Biomechanics.

Arnold, A.S., Liu, M.Q., Schartz, M.H., Ounpuu, S., Dias, L.S., and Delp, S.L. (in press) Do the hamstrings operate at increased muscle-tendon lengths and velocities after surgical lengthening? Journal of Biomechanics.

Arnold, A.S., Liu, M.Q., Schartz, M.H., Ounpuu, S., and Delp, S.L. (in press) The role of estimating muscle-tendon lengths and velocities of the hamstrings in the evaluation and treatment of crouch gait. Gait and Posture.

Liu, M.Q., Arnold, A.S., Goldberg, S.R., Anderson, F.C., Thelen, D.G, Ounpuu, S., Delp, S.L. (2005) Quadriceps force in stance limits knee flexion in swing: Insight from a subject-specific simulation of stiff-knee gait. Proceedings of the 10th Annual Meeting of the Gait and Clinical Movement Analysis Society. Portland, OR. April 6-9.

Hobbies
Hiking, Backpacking, Singing

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