LL Muscles Flashcards
(39 cards)
Adductor brevis
O: inferior ramus of pubis
I: linea aspera and pectineal line
INN: obturator nerve (L2-4)
A: hip adduction, flexion (anat position), extension (90° hip fx)
Adductor longus
O: pubis
I: linea aspera
INN: obturator nerve (L2-4)
A: hip adduction, flexion (anat position), extension (90° hip fx)
Adductor magnus
O: ischiopubic ramus and ischial tuberosity
I: linea aspera, medial supracondylar ridge adductor tubercle
INN: obturator nerve (L2-4)
A: hip adduction and extension
Biceps femoris - long head
O: ischial tuberosity
I: head of fibula
INN: tibial nerve (L4-S1)
A: hip extension, knee flexion, tibial lateral rotation (in knee fx)
Biceps femoris - short head
O: linea aspera
I: head of fibula
INN: common fibula nerve (L5-S1)
A: knee flexion, tibial lateral rotation (in knee fx)
Extensor digitorum longus
O: lateral condyle of tibia, anterior fibula
I: distal phalanges 2-5
INN: deep fibular nerve (L4-S1)
A: toe 2-5 extension, dorsiflexion
Extensor hallucis longus
O: anterior fibula
I: distal phalanx 1
INN: deep fibular nerve (L4-S1)
A: toe 1 extension, dorsiflexion
Fibularis brevis
O: midlateral fibula
I: base of MT5
INN: superficial fibular nerve (L5-S2)
A: eversion, weak plantarflexion
Fibularis longus
O: head and proximal fibula, lateral condyle of tibia
I: base of MT 1 and medial cuneiform
INN: superficial fibular nerve (L5-S2)
A: eversion, weak plantarflexion
Fibularis tertius
O: anterior distal fibula
I: base of MT 5
INN: deep fibular nerve (L5-S1)
A: dorsiflexion, weak eversion
Flexor digitorum longus
O: posteromedial tibia
I: distal phalanges 2-5
INN: tibial nerve (L5-S1)
A: plantarflexion, MP+PIP+DIP 2-5 flexion
Flexor hallucis longus
O: posterior inferior fibula
I: distal phalanx 1
INN: tibial nerve (L5-S1)
A: plantarflexion, MP+IP 1 flexion
Gastrocnemius
O: lateral and medial condyles of femur
I: calcaneus
INN: tibial nerve (L4-S1)
A: knee flexion, plantarflexion
Gluteus maximus
O: iliac crest, sacrum and coccyx
I: iliotibial band, linea aspera and gluteal tuberosity
INN: inferior gluteal nerve (L5-S2)
A: hip extension, abduction (upper segments). adduction (lower segments)
Gluteus medius
O: iliac crest, lateral surface bw pos and ant gluteal lines
I: greater trochanter
INN: superior gluteal nerve (L4-S1)
A: hip abduction and internal rotation (all in hip fx, anterior portion in hip ex)
Gluteus minimus
O: lateral ilium bw inf and ant gluteal lines
I: greater trochanter
INN: superior gluteal nerve (L4-S1)
A: hip abduction and internal rotation (all in hip fx, anterior portion in hip ex)
Gracilis
O: inferior ramus and body of pubis
I: upper medial tibia
INN: obturator nerve (L2-4)
A: hip adduction and flexion, knee flexion, tibial medial rotation (in knee fx)
Iliacus
O: iliac fossa
I: lesser trochanter and anterior capsule of hip
INN: femoral nerve (L2-3)
A: hip flexion, external rotation
Inferior gemellus
O: ischial tuberosity
I: greater trochanter
INN: nerve to quadratus femoris (L5-S1)
A: hip external rotation
Obturator externus
O: obturator foramen
I: trochanteric fossa
INN: obturator nerve (L3-4)
A: hip external rotation
Obturator internus
O: obturator foramen
I: greater trochanter
INN: nerve to obturator internus (L5-S2)
A: hip external rotation
Pectineus
O: superior ramus of pubis
I: pectineal line
INN: femoral or obturator nerves
A: hip adduction and flexion
Piriformis
O: anterolateral sacrum (greater sciatic foramen)
I: greater trochanter
INN: L5-S2 ventral rami
A: hip external rotation (hip ex), internal rotation (hip fx)
Plantaris
O: lateral supracondylar ridge of femur
I: posterior calcaneus
INN: tibial nerve (L4-S1)
A: weak knee flexion, weak plantarflexion
