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Muscles of the Lower Extremity
Muscles of the Lower Extremity
152
Anatomy
Undergraduate 3
09/27/2008

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Term
Psoas Major origin
Definition
5 lowest vertebrae
Term
Psoas Major insertion
Definition
lesser trochanter
Term
Psoas Major action
Definition
hip flexion
Term
Psoas Major innervation
Definition
femoral nerve
Term
Iliacus origin
Definition
ilium, iliac fossa
Term
Iliacus insertion
Definition
lesser trochanter
Term
Iliacus action
Definition
hip flexion
Term
Iliacus innervation
Definition
Femoral nerve
Term
Gluteus Maximus origin
Definition
posterior ilium, sacral coxex
Term
Gluteus Maximus insertion
Definition
gluteal tuberosity, ilial tibial tract
Term
Gluteus Maximus action
Definition
hip extension
Term
Gluteus Maximus innervation
Definition
inferior gluteal nerve
Term
Gluteus Medius origin
Definition
outer ilium, iliac crest
Term
Gluteus Medius insertion
Definition
greater trochanter
Term
Gluteus Medius action
Definition
hip abduction
Term
Gluteus Medius innervation
Definition
superior gluteal nerve
Term
Gluteus Minimus origin
Definition
outer ilium
Term
Gluteus Minimus insertion
Definition
greater trochanter
Term
Gluteus Minimus action
Definition
hip abduction
Term
Gluteus Minimus innervation
Definition
superior gluteal nerve
Term
Tensor Fasciae Latae origin
Definition
iliac crest
Term
Tensor Fasciae Latae insertion
Definition
ilial tibial tract
Term
Tensor Fasciae Latae action
Definition
hip abduction, hip flexion
Term
Tensor Fasciae Latae innervation
Definition
superior gluteal nerve
Term
Piriformis origin
Definition
anterior sacrum
Term
Piriformis insertion
Definition
greater trochanter
Term
Piriformis action
Definition
hip abduction, hip external rotation
Term
Piriformis innervation
Definition
nerve to the piriformis
Term
Obturator Internus and Externus origin
Definition
obturator membrane
Term
Obturator Internus and Externus insertion
Definition
greater trochanter
Term
Obturator Internus and Externus action
Definition
hip external rotation
Term
Obturator Internus and Externus innervation
Definition
Obturator nerve
Term
Superior and Inferior Gemelli origin
Definition
ischial spine and tubersoity
Term
Superior and Inferior Gemelli insertion
Definition
greater trochanter
Term
Superior and Inferior Gemelli action
Definition
hip external rotation
Term
Superior and Inferior Gemelli innervation
Definition
nerve to the piriformis
Term
Quadratis Femoris origin
Definition
ischial tuberosity
Term
Quadratis femoris insertion
Definition
femur - intertrochanteric crest
Term
Quadratis femoris action
Definition
hip external rotation
Term
Quadratis femoris innervation
Definition
nerve to the quadratis femoris
Term
Sartorius origin
Definition
Anterior Superior Iliac Spine
Term
Sartorius insertion
Definition
medial tibial condyle
Term
Sartorius action
Definition
hip and knee flexion
Term
Sartorius innervation
Definition
femoral nerve
Term
Rectus femoris origin
Definition
Anterior inferior iliac spine
Term
Rectus Femoris insertion
Definition
patellar tendon, tibial tuberosity
Term
Rectus femoris action
Definition
hip flexion, knee extension
Term
Rectus femoris innervation
Definition
femoral nerve
Term
Vastus lateralis origin
Definition
linea aspera (lateral)
Term
Vastus lateralis insertion
Definition
patellar tendon, tibial tuberosity
Term
Vastus lateralis insertion
Definition
patellar tendon, tibial tuberosity
Term
Vastus lateralis action
Definition
knee extension
Term
Vastus lateralis innervation
Definition
femoral nerve
Term
Vastus medialis origin
Definition
linea aspera (medial)
Term
Vastus medialis insertion
Definition
patellar tendon, tibial tuberosity
Term
Vastus medialis action
Definition
knee extension
Term
Vastus medialis innervation
Definition
femoral nerve
Term
Vastus intermedius origin
Definition
anterior surface of the femur
Term
Vastus intermedius insertion
Definition
patellar tendon, tibial tuberosity
Term
Vastus intermedius action
Definition
knee extension
Term
Vastus intermedius innervation
Definition
femoral nerve
Term
Pectineus origin
Definition
pubis
Term
Pectineus insertion
Definition
femur
Term
Pectineus action
Definition
hip adduction
Term
Pectineus innervation
Definition
femoral and obturator nerve
Term
Gracilis origin
Definition
pubis
Term
Gracilis insertion
Definition
medial tibial condyle
Term
Gracilis action
Definition
hip adduction, knee flexion
Term
Gracilis innervation
Definition
obturator nerve
Term
Adductor longus origin
Definition
pubis
Term
Adductor longus insertion
Definition
medial femur, linea aspera
Term
Adductor longus action
Definition
hip adduction
Term
Adductor longus innervation
Definition
obturator nerve
Term
Adductor brevis origin
Definition
pubis
Term
Adductor brevis insertion
Definition
femur, linea aspera
Term
Adductor brevis action
Definition
hip adduction
Term
Adductor brevis innervation
Definition
obturator nerve
Term
Adductor brevis innervation
Definition
obturator nerve
Term
Adductor magnus origin
Definition
ischial tuberosity
Term
Adductor magnus insertion
Definition
linea aspera, adductor tubercle
Term
Adductor magnus action
Definition
hip adduction
Term
Adductor magnus innervation
Definition
obturator nerve
Term
Biceps femoris origin
Definition
(long) = ischial tuberosity
(short) = linea aspera
Term
Biceps femoris insertion
Definition
head of fibula
Term
Biceps femoris
Definition
hip extension, knee flexion
Term
Biceps femoris innervation
Definition
(long) = tibial nerve
(short) = common peroneal nerve
Term
Semitendinosus origin
Definition
ischial tuberosity
Term
Semitendinosis insertion
Definition
anterior medial tibial condyle
Term
Semitendinosus action
Definition
hip extension, knee flexion
Term
Semitendinosus action
Definition
hip extension, knee flexion
Term
Semitendinosis innervation
Definition
tibial nerve
Term
Semimebranosus origin
Definition
ischial tuberosity
Term
Semimembranosus insertion
Definition
posterior medial tibial condyle
Term
Tibialis Anterior position
Definition
immediately lateral to tibia
Term
Tibialis Anterior action
Definition
dorsiflexion, foot inversion
Term
Tibialis anterior innervation
Definition
deep peroneal nerve
Term
Extensor digitorum longus position
Definition
lateral to tibialis anterior
Term
Extensor digitorum longus action
Definition
dorsiflexion, eversion, extends digits
Term
Extensor digitorum longus innervation
Definition
deep peroneal nerve
Term
Extensor hallucis longus position
Definition
deep to TA and EDL (between them as it crosses ankle)
Term
Extensor hallucis longus action
Definition
dorsiflexion, inversion, hallux extension
Term
Extensor hallucis longus innervation
Definition
deep peroneal nerve
Term
Peroneus longus origin
Definition
head and upper third of fibula
Term
Peroneus longus insertion
Definition
base of 5th metatarsal
Term
Peroneus longus action
Definition
plantarflexion, eversion
Term
Peroneus longus innervation
Definition
superficial peroneal nerve
Term
Peroneus brevis origin
Definition
lower third of fibula
Term
Peroneus brevis insertion
Definition
base of 5th metatarsal
Term
Peroneus brevis action
Definition
plantarflexion, eversion
Term
Peroneus brevis innervation
Definition
superficial peroneal nerve
Term
Peroneus tertius origin
Definition
extensor retnaculum
Term
Peroneus tertius insertion
Definition
5th metatarsal
Term
Peroneus tertius action
Definition
eversion
Term
Peroneus tertius innervation
Definition
deep peroneal nerve
Term
Gastrocnemius origin
Definition
femoral condyles
Term
Gastrocnemius insertion
Definition
calcaneal bump
Term
Gastrocnemius action
Definition
plantarflexion, knee flexion
Term
Gastrocnemius innervation
Definition
tibial nerve
Term
Soleus origin
Definition
proximal ends of tibia and fibula
Term
Soleus insertion
Definition
calcaneal tendon
Term
Soleus action
Definition
plantarflexion
Term
Soleus innervation
Definition
tibial nerve
Term
Plantaris origin
Definition
lateral femoral condyle
Term
Plantaris insertion
Definition
calcaneal tendon
Term
Plantaris action
Definition
knee flexion
Term
Plantaris innervation
Definition
tibial nerve
Term
Popliteus origin
Definition
lateral femoral condyle
Term
Popliteus insertion
Definition
medially around tibia
Term
Popliteus action
Definition
knee flexion
Term
Popliteus innervation
Definition
tibial nerve
Term
Popliteus innervation
Definition
tibial nerve
Term
Flexor digitorum longus position
Definition
most medial, loops around medial malleolus and splits into 4
Term
Flexor digitorum longus action
Definition
digit flexion, plantarflexion
Term
Flexor digitorum longus innervation
Definition
tibial nerve
Term
Flexor hallucis longus position
Definition
most lateral
Term
Flexor hallucis longus action
Definition
hallux flexion, plantarflexion
Term
Flexor hallucis longus innervation
Definition
tibial nerve
Term
Tibialis posterior position
Definition
inserts into tarsals
Term
Tibialis posterior action
Definition
plantarflexion, inversion
Term
Tibialis posterior innervation
Definition
tibial nerve
Term
Abductor hallucis position
Definition
hallux
Term
Abductor hallucis action
Definition
hallux abduction
Term
Abductor hallucis innervation
Definition
medial plantar nerve
Term
Flexor digitorum brevis position
Definition
inserts across digits 2-5
Term
Flexor digitorum brevis action
Definition
digit flexion 2-5
Term
Flexor digitorum brevis innervation
Definition
medial plantar nerve
Term
Abductor digiti minimi position
Definition
most lateral
Term
Abductor digiti minimi action
Definition
little toe abduction
Term
Abductor digiti minimi innervation
Definition
lateral plantar nerve
Term
Dorsal interossei action
Definition
1-2 = abduction of digit 2
3 = abduction of digit 3
4 = abduction of digit 4
Term
Plantar Interossei action
Definition
1 = adduction of digit 3
2 = adduction of digit 4
3 = adduction of digit 5
Term
Interossei innervation
Definition
lateral plantar nerve
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