KP221 Lecture Notes - Lecture 35: Tibial Nerve, Tibialis Posterior Muscle, Triceps Surae Muscle

• School: WLU
• Department: Kinesiology & Physical Education
• Course: KP221
• Professor: Michael Cinelli

Document Summary

Kp221 lecture topic 35: origin: posterior surface of femur (proximal to medial and lateral condyles) Triceps surae: insertion point of soleus and two heads of gastrocnemius: all these muscles are most active when walking on flat surface during phase when use proportional force (choosing direction, good mechanical advantage to propel body forward. Insertion: anterior surface of calcaneal tendon: action: plantar flexor of foot (and can plantar flex foot with bent knee, during stance = prevents dorsiflexion. Plantaris: origin: lateral epicondyle of femur above lateral gastrocnemius. Insertion: calcaneus (anteriomedial to calcaneal tendon: action: flexion of leg at knee and (weak) plantar flexion of foot, could(cid:374)(cid:859)t propel (cid:271)od(cid:455) forward without gastro(cid:272)(cid:374)e(cid:373)ius a(cid:374)d soleus, would(cid:374)(cid:859)t (cid:271)e a(cid:271)le to keep dorsifle(cid:454)io(cid:374) i(cid:374) (cid:272)he(cid:272)k. Popliteus: unlocks knee (hinge joint) in extended position to initiate knee flexion and get us into the swing phase, when enter weight acceptance knee locks to prevent buckling, origin: lateral condyle of femur in knee joint capsule.