Lab 13: Muscle Charts (Part 1)

extends, laterally rotates, and abducts the hip

gluteus maximus

action

iliotibial tract (to Gerdy’s tubercle); gluteal tuberosity of femur

gluteus maximus

insertion

inferior gluteal nerve

gluteus maximus

innervation

abducts and medially rotates hip

gluteus medius & gluteus minimus

action

greater trochanter of femur

gluteus medius & gluteus minimus

insertion

superior gluteal nerve

gluteus medius & gluteus minimus

innervation

laterally rotate hip

piriformis

action

extends hip

biceps femoris long head

action

ischial tuberosity

biceps femoris long head

origin

head of fibula

biceps femoris long head

insertion

tibial division of sciatic nerve

biceps femoris long head

innervation

flexes & laterally rotates knee

biceps femoris short head

action

linea aspera

biceps femoris short head

origin

head of fibula

biceps femoris short head

insertion

common fibular division of sciatic nerve

biceps femoris short head

innervation

extends hip & flexes knee; medially rotates knee

semimembranosus & semitendinosus

action

ischial tuberosity

semimembranosus & semitendinosus

origin

pes anserine insertion

semitendinosus

insertion

tibial division of sciatic nerve

semimembranosus & semitendinosus

innervation

flexes knee & plantar flexes ankle

gastrocnemius

action

calcaneus (via calcaneal tendon)

gastrocnemius & soleus

origin/insertion

tibial nerve

gastrocnemius, soleus, plantaris

innervation

plantar flexes ankle

soleus

action

weak knee flexor & weak ankle plantar flexor

plantaris

action

plantar flexes & weakly inverts ankle; flexes MTP, PIP, & DIP of toes 2-5

flexor digitorum longus

action

plantar flexes & weakly inverts ankle; flexes MTP & IP of great toe

flexor hallucis longus

action

plantar flexes & inverts ankle

tibialis posterior

action

flexes knee; medially rotates tibia to unlock knee

popliteus

action

tibial nerve

flexor digitorum longus, flexor hallucis longus, tibialis posterior, popliteus

innervation