Lower Extremity Muscles Flashcards
gluteus maximus
inn: inferior gluteal n. (L5-S2)
-posterior gluteal line
-sacrum
-greater trochanter
-IT Band
Action: hip extension, lateral rotation
gluteus maximus
inn: superior gluteal n. (L4-S1)
-external iliac surface
-greater trochanter
Action: hip abduction, medial rotation
gluteus minimus
inn: superior gluteal n. (L4-S1)
-external iliac surface
-greater trochanter
Action: hip abduction, medial rotation
piriformis
inn: n. to piriformis (S1-2)
-lateral sacrum
-greater trochanter
Action: hip abduction, lateral rotation
superior gemellus
inn: sacral plexus (L5-2)
-spine of ischium
-greater trochanter
Action: lateral rotation
obturator internus
inn: n. to obturator internus (L5-S2)
-ischium
-greater trochanter
Action: lateral rotation
inferior gemellus
inn: sacral plexus (L4-S1)
-inferior ischial spine
-greater trochanter
Action: lateral rotation
quadratus femoris
inn: n. to quadratus femoris (L4-S1)
-ischial tuberosity
-quadrate tubercle
Action: lateral rotation
sartorius
inn: femoral n. (L2-4)
-anterior superior iliac spine
-medial tibia
Action: hip flexion, abduction, lateral rotation,
Knee flexion
rectus femoris
inn: femoral n. (L2-4)
-anterior inferior iliac spine
-base of patella
Action: hip flexion, Knee extension
tensor fasciae latae
inn: superior gluteal n. (L4-S1)
-anterior superior iliac spine
-IT band
Action: hip flexion, medial rotation, abduction
vastus lateralis
inn: femoral n. (L2-4)
-intertrochanteric line
-greater trochanter
-linea aspera
-lateral patella
Action: knee extension
vastus intermedius
inn: femoral n. (L2-4)
-anterior 2/3 femur
-patella
Action: knee extension
vastus medialis
inn: femoral n. (L2-4)
-intertrochanteric line
-linea aspera
-spiral line
-medial supracondylar line
-medial patella
Action: knee extension
iliacus
inn: femoral n. (L2-4)
-iliac crest
-lesser trochanter
Action: hip flexion
psoas major
inn: ventral rami of lumbar plexus (L1-4)
-anterior TPs of vertebrae
-lesser trochanter
Action: hip flexion
pectineus
inn: obturator and femoral nn. (L2-4)
-superior pubic ramus
-pectineal line
Action: hip adduction, flexion
adductor brevis
inn: obturator n. (L2-4)
-inferior pubic ramus
-pectineal line
-medial lip of linea aspera
Action: hip adduction, flexion
adductor longus
inn: obturator n. (L2-4)
-pubic crest
-linea aspera
Action: hip adduction, flexion
adductor magnus
inn: obturator n. (L2-4), tibial div. of sciatic n. (L4-S1)
-inferior pubic ramus
-linea aspera
-supracondylar line
-gluteal tuberosity
Action: hip flexion, adduction, extension
gracilis
inn: obturator n. (L2-4)
-inferior pubic ramus
-medial tibia
Action: hip adduction, knee extension, medial rotation
obturator externus
inn: obturator n. (L3-4)
-pubic ramus
-obturator membrane
-trochanteric fossa
Action: lateral rotation
biceps femoris long head
inn: tibial division of sciatic n. (L5-3)
-ischial tuberosity
-lateral fibular head
Action: hip extension, knee flexion, knee lateral rotation
biceps femoris short head
inn: fibular division of sciatic n. (L5-2)
-lateral linea aspera
-lateral supracondylar line
-lateral fibular head
Action: knee flexion, lateral rotation
semitendinosis
inn: tibial division of sciatic n. (L4-S2)
-ischial tuberosity
-medial tibia
Action: hip extension, knee flexion, medial rotation
semimembranosis
inn: tibial division of sciatic n. (L4-S2)
-ischial tuberosity
-medial condyle of femur
Action: knee flexion, medial rotation, hip extension
tibialis anterior
inn: deep fibular n. (L4-S1)
-lateral condyle of femur
-medial cuneiform
-1st metatarsal
Action: dorsiflexion, inversion
extensor hallucis longus
inn: deep fibular n. (L4-S1)
-middle 1/2 fibula
-distal phalynx 1
Action: dorsiflexion, extend digit 1 (MP&IP)
extensor digitorum longus
inn: deep fibular n. (L4-S1)
-lateral condyle of tibia
-dorsal digital expansions 2-5
Action: dorsiflexion, extend digits 2-5 (MP&IP)
fibularis tertius
inn: deep fibular n. (L4-S1)
- distal fibula
- 5th metatarsal
action: dorsiflexion, eversion
fibularis longus
inn: superficial fibular n. (L4-S1)
- proximal 2/3 fibula
- medial cuneiform
- lateral 1st metatarsal
action: plantar flexion, eversion
fibularis brevis
inn: superficial fibular n. (L4-S1)
- distal 2/3 fibula
- base of 5th metarsal
action: plantar flexion, eversion
gastrocnemius
inn: tibial n. (S1-2)
- posterior femoral condyles
- calcaneus
action: knee flexion, plantar flexion
soleus
inn: tibial n. (L5-S2)
- proximal 1/3 fibula
- soleal line of tibia
- calcaneus
action: plantar flexion
plantaris
inn: tibial n. (L4-S1)
-lateral supracondylar line
-calcaneus
Action: knee flexion, plantar flexion
popliteus
inn: tibial n. (L4-S1)
- lateral femoral condyle
- soleal line of tibia
action: medial and lateral rotation of knee
flexor digitorum longus
inn: tibial n. (L5-S2)
- posterior tibia
- plantar base of distal phalanges 2-5
action: plantar flexion, flex digits 2-5 (MP&IP)
tibialis posterior
inn: tibial n. (L4-S1)
- lateral fibula, medial tibia
- navicular
- medial and intermediate cuneiforms
- base of MT 2-4
action: plantar flexion, inversion
flexor hallucis longus
inn: tibial n. (L5-S2)
- distal 2/3 fibula
- distal phalynx 1
action: plantar flexion, flex digit 1 (MP&IP)
extensor hallucis brevis
inn: deep fibular n. (L4-S1)
- extensor digitorum brevis
- proximal phalynx 1
action: extend digit 1 (MP)
extensor digitorum brevis
inn: deep fibular n. (L4-S1)
- anterolateral calcaneus
- extensor digitorum longus tendons 2-4
action: extend digits 2-5 (MP&IP)
abductor hallucis
inn: medial plantar n. (L4-S1)
-calcaneal tuberosity
-medial proximal phalynx 1
Action: abduct, flex digit 1
flexor digitorum brevis
inn: medial plantar n. (L4-S1)
- calcaneal tuberosity
- intermediate phalynx 2-5
action: flex digits 2-5 (IP)
abductor digiti minimi
inn: lateral plantar n. (S1-2)
- calcaneal tuberosity
- lateral proximal phalynx 5
action: abduct digit 5
quadratus plantae
inn: lateral plantar n. (S1-2)
- extensor digitorum longus tendons
- calcaneal tuberosity
action: assist FDL
lumbricals
inn: medial plantar n. (1) lateral plantar n. (2-4)
-FDL tendons
-medial dorsal digital expandsions
Actions: flex MP, extends IP
flexor hallucis brevis
inn: medial plantar n. (L4-S1)
-cuboid
-proximal phalynx 1
Action: flex digit 1 (MP)
adductor hallucis (oblique head, transverse head)
inn: lateral plantar n. (S1-2)
- base of metatarsals 2-4
- distal metatarsals 3-5
action: adducts digit 1
flexor digiti minimi brevis
inn: lateral plantar n. (S1-2)
-base of 5th metatarsal
-proximal phalynx 5
Action: flex digit 5 (MP)
plantar interossei (3)
inn: lateral plantar n. (S1-2)
- base of MT
- dorsal digital expansions 3-5
action: adduct & flex MP digits 3-5
dorsal interossei (4)
inn: lateral plantar n. (S1-2)
-MT shafts
-prox phalynx and dorsal digital expansions 2-4)
Action: abducts and flexes MP digits 2-4
