Pes anserinus
– Discussion: – pes arserinus is final common tendinous insertion of sartorius, gracilis, & semitendinosus along proximal medial aspect to tibia; – these muscles serve as flexors & internal rotators, & help protect knee … Read more
Muscles Tendons
Pes Cavus
– Discussion: – cavus deformity of the foot (elevated longitudinal arch) due to fixed plantar flexion of the forefoot; – frequency: The anatomy of cavus foot deformity – main type is the cavovarus; – associated with spinal cerebellar degenerative dz; – associated deformities: – claw toes – differential dx: (commonly associatted with neurologic disorders) – … Read more
Pes Cavus / Cavovarus: Charcot Marie Tooth
– See: – Charcot Marie Tooth: Perineal Muscular Atrophy: – General Discussion of Pes Cavus: – Discussion: – muscle weakness primarily affects peroneus brevis muscle and tibialis anterior, w/ relative sparing of peroneus longus (and tibialis posterior); – results in planatar flexion of … Read more
Peroneus Brevis
– Anatomy: – origin: distal 2/3 of the lateral surface of the body of fibula and the adjacent intermuscular septa; – insertion: tuberosity on lateral side of proximal end of 5th metatarsal; – action: – plantar flexion and eversion of the foot … Read more
Peroneus Longus
– Anatomy: – lateral compartment – plantar muscles of the foot: – origin: – lateral condyle of tibia, head and proximal 2/3 of lateral surface of fibula, intermuscular septa and adjacent fascia; – course: – peroneus longus … Read more
Peroneus Tertius
– See: – Lateral Compartment – Anatomy: – origin: distal 1/3 of the anterior surface of the fibula and adjacent intermuscular septum; – insertion: dorsal surface of the base of the 5th metatarsal; – action: dorsiflexes and everts the foot at the ankle; – nerve supply: peroneal, L4, L5, S1 (see innervation) – synergist: extensor … Read more
Peripheral Neuropathies
– See: neuropathic disorders and neuropathic ulceration – Discussion: – neuropathies may be either acute or chronic; – acute: – Guillain Barre syndrome: best known acute neuropathy; – vasculitic neuropathy: – random involvement of … Read more
Peroneal Artery
– Discussion: – largest branch of the posterior tibial artery is peroneal artery arising high in leg and coursing downward in posterior compartment lateral to and deeper than the posterior tibial artery; – lies in the deep posterior compartment, just medial to fibula, just posterior to tibialis posterior, and just anterior … Read more
Peroneal Nerve
– See: – Innerv. Musc. Lower Limb – Innervation of the Leg and Foot: – Anatomy: – common peroneal nerve is derived from (L4, L5, S1, S2) as a part of the sciatic nerve; – posterior component, supplies short head of biceps femoris in thigh, crosses posterior to lateral head of gastrocnemius, and becomes subQ behind … Read more
Peroneal Nerve Palsy in TKR
– See: TKR Menu: – Peroneal Nerve and Peroneal Nerve Palsy – Nerve Injury from THR – Discussion: – peroneal nerve palsy following TKR usually presents acutely but in some cases there will be a delayed presentation; – risk factors: – use of epidural anesthesia; … Read more