In patients with drop foot, the sequence changed in such that only extension and flexion are observed. The first extension can be seen increase in the gait cycle, such that knee hyperextension may be observed. The hyperextension of the knee puts stress on the structure of the joint at the point of heel contact, and increase knee flexor torque due to hamstrings work actively to extend the thigh at the same time.
In normal gait swing phase, the raised leg is propelled forward. The forward motion of…
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