Scott L. Delp, Ph.D.
Departments of Biomedical Engineering and Physical Medicine and Rehabilitation, Northwestern University, Sensory Motor Performance Program, Rehabilitation Institute of Chicago.
The "Muscle_input_file" includes:
(1) a dimensionless force-length curve for tendon,
(2) dimensionless force-length curves for muscle,
(3) a dimensionless force-velocity curve for muscle,
(4) definitions of forty-three lower limb muscles. The definition of each muscle contains a list of coordinates that describe its line of action and the parameters (peak isometric force, optimal fiber length, tendon slack length, and pennation angle) needed to compute isometric muscle force. A more readable summary of musculotendon parameters is given in a separate table.
The "Joint_kinematic_file" includes kinematic descriptions of the hip, knee, ankle, subtalar, and metatarsophalangeal joints.
The "bones directory" includes approximate surface geometry for the bones of the lower limb. The format of these files is described in a file called "bone file format." You can download surface geometry for the pelvis, femur, patella, tibia, fibula, talus, foot, and toes. The patella, tibia, fibula, and bones of the foot were provided by Don Stredney of the Ohio State University.
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.
Delp, S.L.: Surgery simulation: a computer graphics system to analyze and design musculoskeletal reconstructions of the lower extremity, Ph.D. Dissertation, Stanford University, 1990.
If you would like a copy of the dissertation please contact Scott Delp, Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Room 1406, 345 East Superior Street, Chicago, IL 60611, USA (email@example.com).
Arnold, A.A., Komattu, A.V., Delp, S.L.: Internal rotation gait: A compensatory mechanism to restore abduction ca pacity decreased by bone deformity? Developmental Medicine and Child Neurology, vol. 39, pp. 40-44, 1997.
Debski, R.E., Wong, E.K., Warner, J.J.P., Fu, F.H., Woo, S.L-Y.: Transactions of the capsuloligamentous restraints during translation of the glenohumeral joint. Transactions of the 42nd Annual Meeting, Orthopaedic Research So ciety, p. 230, 1996.
Delp, S.L. and Loan, J.P.: A software system to develop and analyze models of musculoskeletal structures, Com puters in Biology and Medicine, vol. 25, pp. 21-34, 1995.
Delp, S.L. and Maloney, W.J.: Effects of hip center location on the moment-generating capacity of muscles. Journal of Biomechanics. vol. 26, pp. 485-499, 1993.
Delp, S.L. and 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.
Delp, S.L., Arnold A.A., 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.
Delp, S.L., Komattu, A.V., Wixson, R.L.: Superior displacement of the hip in total joint replacement: effects of pros thetic 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.
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.
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.
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.
Free, S.A. and Delp, S.L.: Effects of trochanteric transfer on the moment arms, lengths, and force-generating ca pacities of the hip abductors. Journal of Orthopaedic Research, vol. 14, pp. 245-250, 1996.
Gonzalez, R.V., Buchanan, T.S., Delp, S.L.: How muscle architecture and moment arms affect wrist flexion-exten sion moments. Journal of Biomechanics, vol. 30, pp. 705-712, 1997.
Keshner, E.A., Statler, K.D., Delp, S.L.: Kinematics of the freely moving head and neck in the alert cat, Experimental Brain Research, vol. 115, pp. 257-266, 1997.
Kim, A.W., Rosen, A.M., Brander, V.A., Buchanan, T.S.: Selective muscle activation following electrical stimulation of the collateral ligaments of the human knee, Archives Physical Medicine and Rehabilitation, vol. 76, pp. 750-757, 1995.
Lloyd, D.G. and Buchanan, T.S.: A model of load sharing between muscles and soft tissues at the human knee dur ing static tasks, Journal of Biomechanical Engineering, vol. 118, pp. 367-376, 1996.
Murray, W.A., Delp, S.L., Buchanan, T.S.: Variation of muscle moment arms with elbow and forearm position, Jour nal of Biomechanics, vol. 28, pp. 513-525, 1995.
Piazza, S.J. and 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.
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.
Yamaguchi, G.T., Moran, D.W., Si, J.: A computationally efficient method for solving the redundant problem in bio mechanics, Journal of Biomechanics, vol. 28, pp. 999-1005, 1995.