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Modeling the Posture of a Cerebral Palsy Patient with Hamstring Syndrome after Surgical Correction by the Zhuravlev Procedure / Kruchinin P.A., Nikitina O.V. // Vestnik Moskovskogo Universiteta. Seriya 1. Matematika. Mekhanika. 2010. № 2. P. 18-23 [Moscow Univ. Mech. Bulletin. Vol. 65, No 2, 2010. P. 25-30]. Cerebral palsy patients with hamstring syndrome are characterized by an increased tension in the posterior two-joint muscles of the thigh. The upright posture of such patients takes the Z-shaped form. The operations according to the procedure proposed by Eggers and the tendon plastic operations proposed by Zhuravlev help the limbs to straighten. In this paper a mathematical model of the patient posture after a Zhuravlev operation is proposed. The numerical results obtained show that a patient underwent such an operation can maintain a relatively upright posture even with an increased tonus of the rectus muscle of the thigh. This is impossible for a patient after an Eggers operation.
Key words: railway wheelset dynamics, critical speed.
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