Unit 1 Exam Muscles

epimysium

covers entire muscles

perimysium

covers muscle fascicle

endomysium

covers individual muscle fibers

origin of psoas major

L1-L4

insertion of psoas major

lesser trochanter

action of psoas major

flexion

innervation of psoas major

femoral nerve

origin of iliacus

iliac fossa

insertion of iliacus

lesser trochanter

action of iliacus

flexion

innervation of iliacus

femoral nerve

origin of gluteus maximus

posterior sacrum/coccyx/ilium

insertion of gluteus maximus

gluteal tuberosity/IT band

action of gluteus maximus

extension/external rotation

innervation of gluteus maximus

inferior gluteal nerve

origin of gluteus medius

iliac crest/outer ilium

insertion of gluteus medius

greater trochanter

action of gluteus medius

abduction

innervation of gluteus medius

superior gluteal nerve

origin of gluteus minimus

outer ilium

insertion of gluteus minimus

greater trochanter

action of gluteus minimus

abduction

innervation of gluteus minimus

superior gluteal nerve

origin of tensor fascia latae

anterior iliac crest

insertion of tensor fascia latae

IT band

innervation of tensor fascia latae

superior gluteal nerve

action of tensor fascia latae

flexion/abduction

origin of piriformis

anterior sacrum

insertion of piriformis

greater trochanter

action of piriformis

abduction/external rotation

innervation of piriformis

nerve to the piriformis

origin of obturator internus/externus

obterator foramen

insertion of obturator internus/externus

greater trochanter

action of obturator internus/externus

external rotation

innervation of obturator internus/externus

obturator

origin of gemelli

ischial spine/ischial tuberosity

insertion of gemelli

greater trochanter

action of gemelli

external rotation

innervation of gemelli

nerve to quadratus femoris

origin of quadratus femoris

ischial tuberosity

insertion of quadratus femoris

intertrochanteric crest

action of quadratus femoris

external rotation

innervation of quadratus femoris

nerve to quadratus femoris

origin of sartorius

anterior superior iliac spine

insertion of sartorius

medial tibial condyle

action of sartorius

hip flexion/knee flexion

innervation of sartorius

femoral nerve

origin of rectus femoris

anterior inferior iliac spine

insertion of quadriceps femoris group

patella/tibial tuberosity

action of rectus femoris

hip flexion/knee extension

innervation of quadriceps femoris group

femoral nerve

origin of vastus lateralis

lateral linea aspera

action of vastus lateralis

knee extension

origin of vastus medialis

medial linea aspera

action of vastus medialis

knee extension

origin of vastus intermedius

anterior femur

action of vastus intermedius

knee extension

origin of pectineus

superior ramus of pubis

insertion of pectineus

femur

action of pectineus

adduction/internal rotation

innervation of pectineus

femoral nerve

origin of gracilis

inferior ramus of pubis

insertion of gracilis

medial tibial condyle

action of gracilis

adduction/internal rotation/knee flexion

innervation of gracilis

obturator nerve

origin of adductor longus

inferior ramus of pubis

insertion of adductor longus

linea aspera

action of adductor longus

adduction/internal rotation

innervation of adductor longus

obturator nerve

origin of adductor brevis

inferior ramus of pubis

insertion of adductor brevis

linea aspera

action of adductor brevis

adduction/internal rotation

innervation of adductor brevis

obturator nerve

origin of adductor magnus

inferior ramus of pubis

insertion of adductor magnus

linea aspera/adductor tubercle

action of adductor magnus

adduction

innervation of adductor magnus

obturator nerve

origin of semimembranosus

ischial tuberosity

insertion of semimembranosus

medial tibial condyle

action of semimembranosus

hip extension/knee flexion

innervation of semimembranosus

tibial nerve

origin of semitendinosus

ischial tuberosity

insertion of semitendinosus

anterior medial tibial condyle

action of semitendinosus

hip extension/knee flexion

innervation of semitendinosus

tibial nerve

origin of biceps femoris

long head: ischial tuberosity
short head: linea aspera

insertion of biceps femoris

fibular head

action of biceps femoris

hip extension/knee flexion

innervation of biceps femoris

long head: tibial nerve
short head: common fibular nerve

position of tibialis anterior

most medial

action of tibialis anterior

dorsiflexion/inversion

innervation of tibialis anterior

deep fibular nerve

position of extensor digitorum longus

most lateral

action of extensor digitorum longus

dorsiflexion/eversion/extension of digits 2-5

innervation of extensor digitorum longus

deep fibular nerve

position of extensor hallucis longus

middle

action of extensor hallucis longus

extension of hallux/dorsiflexion/inversion

innervation of extensor hallucis longus

deep fibular nerve

origin of fibularis longus

head and upper portion of fibula

insertion of fibularis longus

base of 1st metatarsal