Lower Extremity Flashcards

Question

Semimembranosus

Answer 1

O: Ischial tuberosity I: Posterior surface of medial tibial condyle (some slips into oblique popliteal ligament inserting on lateral condyle) A: Flex and IR flexed knee, extend and assist IR of hip, tilt the pelvic posteriorly N: Sciatic nerve (tibial branch) (L5, S1, S2)

Answer 2

O: Lateral condyle of tibia; proximal, lateral surface of tibia and interosseous membrane I: Medial and inferior surfaces of medial cuneiform and adjacent surfaces on base of 1st metatarsal A: Dorsiflexion of foot at the ankle joint; inversion of foot; dynamic support of the medial arch of foot N: Deep (peroneal) fibular nerve (L4, L5)

Answer 3

O: Middle one-half of medial surface of fibula and adjacent surface of interosseous membrane I: Dorsal surface of base of distal phalanx of great toe A: Extension of the great toe; dorsiflexion of foot at the ankle; invert the foot N: Deep fibular (peroneal) nerve (L5, S1)

Answer 4

O: Proximal one-half of medial surface of fibula, interosseous membrane and lateral tibial condyle I: Bases of distal and middle phalanges of lateral four toes via dorsal digital expansion A: extension of lateral four toes and dorsiflexion of foot (with some eversion) N: Deep fibular (peroneal) nerve (L5, S1)

Answer 5

O: Superolateral surface of the calcaneous I: Base of proximal phalanx of great toe and lateral sides of the tendons of extensor digitorum longus of 2nd to 4th toes A: Extension of metatarsophalangeal and IP joints of great toe and extension of at 2nd to 4th toes N: Deep fibular (peroneal) (L4, L5, S1)

Answer 6

O: Medial head – posterior surface of distal femur just superior to medial condyle Lateral head – upper posterolateral surface of lateral femoral condyle I: Posterior surface of calcaneous via calcaneal tendon A: Plantarflexion at the ankle and flexion at the knee N: Tibial nerve (S1, S2)

Answer 7

O: Soleal line and medial border of the tibia; proximal, posterior aspect of the fibula head and adjacent surfaces of neck and proximal shaft; tendinous arch between tibial and fibular attachment I: Posterior surface of calcaneous via calcaneal tendon A: Plantarflexion at the ankle N: tibial nerve (S1, S2)

Answer 8

O: Inferior part of lateral supracondylar line of femur and oblique popliteal ligament of knee I: Posterior surface of calcaneous via calcaneal tendon A: weak plantar flexion of ankle, weak flexion of the knee N: Tibial nerve (S1, S2)

Answer 9

O: Lateral surface of the lateral femoral condyle and lateral meniscus I: Posterior surface of proximal tibial, superior to soleal line A: stabilizes knee joint (resists lateral rotation of tibia on femur); unlocks knee joint (laterally rotates femur on fixed tibia or medially rotates the tibia on a fixed femur), weak knee flexion N: Tibial nerve (L4, L5, S1)

Answer 10

O: Middle half of the posterior surface of fibula and adjacent interosseous membrane I: Plantar surface of distal phalanx of great toe A: flexion of great toe (at MTP and IP joints); Weak plantar flexion of ankle; Invert the foot N: tibial nerve (S2, S3)

Answer 11

O: Middle portion of the medial side of posterior surface of the tibia I: Plantar surfaces of bases of distal phalanges of the lateral four toes A: flexion of lateral four toes at MTP and IP joints; Weak plantar flexion of the ankle; invert the foot N: Tibial nerve (S2, S3)

Answer 12

O: Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula, inferior to the soleal line I: Primarily to tuberosity of navicular and adjacent region of medial cuneiform; some tendinous attachment to the MT bases 2-4 and other tarsal bones A: Inversion and plantarflexion of the foot at TCJ; support medial arch of foot during walking N: Tibial nerve (L4, L5)

Answer 13

O: Proximal two-thirds of the lateral surface of the fibula, head of fibula I: Base of the first metatarsal and medial cuneiform A: Eversion of foot, weak plantarflexion; support arches of foot N: Superficial fibular nerve (L5, S1, S2)

Answer 14

O: Distal two-thirds of the lateral surface of shaft of fibula I: Tuberosity at the 5th metatarsal A: Eversion of the foot and weak plantarflexion of the ankle N: Superficial fibular nerve (L5, S1, S2)

Answer 15

O: Distal part of medial surface of fibula I: Dorsomedial surface of base of 5th metatarsal A: dorsiflexion and eversion of the foot N: deep fibular nerve (L5, S1)

Answer 16

O:Medial process of calcaneus and plantar aponeurosis I: Proximal phalanax of the first toe (medial surface) and medial sesamoid bone A: Abduct the first toe (MTP joint) and assist to flex the first toe N: Medial plantar nerve from the tibial nerve (S2, S3)

Answer 17

O: Medial process of calcaneal tuberosity and plantar aponeurosis I: Sides of plantar surface of middle phalanges of 2nd to 5th toes A: Flexion of lateral four toes at proximal interphalangeal joint N: medial plantar nerve from the tibial nerve (S2, S3)

Answer 18

O: lateral and medial process of calcaneal tuberosity and plantar aponeurosis I: Lateral side of base of proximal phalanx of little toe A: Abduction and flexion of the 5th toe at the metatarsophalangeal joint N: Lateral plantar nerve from the tibial nerve (S2, S3)

Answer 19

O: Medial surface of calcaneus and lateral process of calcaneal tuberosity I: Lateral side of tendon of flexor digitorum longus A: Assist flexor digitorum longus in flexing 2nd to 5th toes, changing the angle of force application to be more linear N: Lateral plantar nerve from tibial nerve (S2, S3)

Answer 20

O: Tendons of flexor digitorum longus I: Medial slips into extensor hoods of 2nd to 5th toes A: Flexion of metatarsophalangeal joint and extension of interphalangeal joints of toes 2-5 N: 1st lumbrical – medial plantar nerve from the tibial nerve (S2, S3) 2nd to 4th lumbrical - lateral plantar nerve from the tibial nerve (S2, S3)

Answer 21

O: Plantar surface of the cuboid, and lateral cuneiforms; tendon of the tibialis posterior I: Lateral and medial sides of base of proximal phalanx of the great toe via sesamoids A: Flexion of the metatarsophalangeal joint of the great toe N: Medial plantar nerve from tibial nerve (S2, S3)

Answer 22

O: Transverse head – ligaments associated with metatarsophalangeal joints of lateral three toes Oblique head – bases of 2nd to 4th metatarsals I: Lateral side of base of proximal phalanx of great toe A: Adduction of the great toe at metatarsophalangeal joint and maintain transverse arch, weak flexion N: lateral plantar nerve from tibial nerve (S2, S3)

Answer 23

O: Base of the 5th metatarsal and related sheath of fibularis longus tendon I: Lateral side of base of proximal phalanx of little toe A: Flexion of little toe at the metatarsophalangeal joint N: Lateral plantar nerve from tibial nerve (S2, S3)

Answer 24

O: Sides of adjacent metatarsals I: Extensor hoods and bases of proximal phalanges of 2nd to 4th toes First: Medial surface of proximal phalanx of 2nd toe Second-fourth: Lateral surfaces of proximal phalanx of 2nd-4th toes A: Open Chain: Abduction of 2nd to 4th toes at metatarsophalangeal joint; flexion of the metatarsalphalangeal joint and extension of the interphalangeal joint Closed Chain: resists extension of metatarsophalangeal joints and resist flexion of interphalangeal joint N: Lateral plantar nerve from tibial nerve (S2, S3) 1st and 2nd interossei may also have dual innervation by deep fibular nerve

Answer 25

O: Medial sides of metatarsals of 3rd to 5th toes I: extensor hoods and bases of proximal phalanges of 3rd to 5th toes on medial side A: Open Chain: Adduction of 3rd to 5th toes at metatarsophalangeal joint; flexion of the metatarsalphalangeal joint and extension of the interphalangeal joint Closed Chain: resists extension of metatarsophalangeal joints and resist flexion of interphalangeal joint N: lateral plantar nerve from tibial nerve (S2, S3)

Lower Extremity Flashcards

(49 cards)