BIOL 319 Lab Practical 2 Muscle AOI's

Muscle AOI's

anterior and medial hip muscle group

iliopsoas (iliacus and psoas major), sartorius

AOI of iliopsoas (iliacus and psoas major)

A: flexion of thigh and medial rotation of femur

O: iliac fossa, ala of sacrum and vertebrae (T12-L5)

I: lesser trochanter (femur)

both human and cat

AOI of sartorius

A: flexion of thigh and lateral rotation of femur

O: anterior superior iliac spine

I: proximal shaft of tibia

both human and cat

medial thigh muscle group

adductor magnus, adductor longus and brevis, pectineus, gracilis

AOI of adductor magnus

A: adduction and extension of thigh

O: pubis and ischium

I: gluteal tuberosity and linea aspera (femur)

both human and cat

AOI of adductor longus and brevis

A: adduction of thigh

O: body and inferior ramus (pubis)

I: linea aspera

both human and cat

AOI of pectineus

A: adducts, flexes, and medially rotates thigh

O: body and superior ramus (pubis)

I: proximal shaft of femur

both human and cat

AOI of gracilis

A: adduction of thigh; flexion of leg

O: body and superior ramus (pubis)

I: proximal shaft of tibia

both human and cat

anterior thigh muscle group

rectus femoris (quadriceps), vastus lateralis (quadriceps), vastus medialis (quadriceps), vastus intermedius (quadriceps), tensor fasciae latae

AOI of rectus femoris (quadriceps)

A: extension of leg; flexion of thigh

O: anterior inferior iliac spine

I: patella and tibial tuberosity

both human and cat

AOI of vastus lateralis (quadriceps)

A: extension of leg

O: greater trochanter (femur)

I: patella and tibial tuberosity

both human and cat

AOI of vastus medialis (quadriceps)

A: extension of leg

O: intertrochanteric line and linea aspera (femur)

I: patella and tibial tuberosity

both human and cat

AOI of vastus intermedius (quadriceps)

A: extension of leg

O: anterolateral shaft of femur

I: patella and tibial tuberosity

both human and cat

AOI of tensor fasciae latae

A: flexion, abduction, and medial rotation of thigh

O: anterior superior iliac spine

I: iliotibial tract

both human and cat

anterior lower leg muscle group

tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius

AOI of tibialis anterior

A: dorsiflexes and inverts foot

O: lateral condyle shaft (tibia); interosseus membrane

I: metatarsal I; medial cuneiform

both human and cat

AOI of extensor digitorum longus

A: extension of toes; dorsiflexion and eversion of foot

O: lateral condyle shaft (tibia); interosseus membrane

I: distal phalanges II-V

both human and cat

AOI of extensor hallucis longus

A: extension of toes; dorsiflexion and inversion of foot

O: fibula; interosseus membrane

I: distal phalynx of the great toe

human only

AOI of fibularis tertius

A: dorsiflexion and eversion of the foot

O: fibula; interosseus membrane

I: metatarsal V

both human and cat

lateral lower leg muscle group

fibularis brevis, fibularis longus

AOI of fibularis brevis

A: plantar flexion and eversion of foot

O: distal shaft of fibula

I: metatarsal V

both human and cat

AOI of fibularis longus

A: plantar flexion and eversion of foot

O: proximal shaft of fibula

I: metatarsal I; medial cuneiform

both human and cat

posterior superficial lower leg muscle group

gastrocnemius (medial and lateral head), plantaris, soleus

AOI of gastrocnemius

A: plantar flexion of foot; flexion of leg

O: medial and lateral condyles (femur)

I: calcaneus

both human and cat

AOI of plantaris

A: plantar flexion of foot; flexion of leg

O: distal shaft of femur

I: calcaneus

both human and cat

AOI of soleus

A: plantar flexion of foot

O: proximal shafts of tibia and fibula

I: calcaneus

both human and cat

posterior deep lower leg muscle group

flexor digitorum longus, flexor hallucis longus

AOI of flexor digitorum longus

A: plantar flexion and inversion of foot; flexion of toes II-V

O: mid-shaft of tibia

I: distal phalanges II-V

both human and cat

AOI of flexor hallucis longus

A: plantar flexion and inversion of foot; flexion of great toe

O: posterior shaft of fibula; interosseus membrane

I: distal phalange of great toe

human only

gluteal muscles muscle group

gluteus medius, gluteus maximus

AOI of gluteus medius

A: abduction of thigh

O: ala (ilium)

I: greater trochanter (femur)

both human and cat

AOI of gluteus maximus

A: extension, lateral rotation, and abduction of thigh

O: ala (ilium), sacrum; coccyx

I: gluteal tuberosity (femur)

both human and cat

posterior thigh muscle group

biceps femoris (hamstrings), semitendinosus, semimembranosus

AOI of biceps femoris (hamstrings)

A: flexion of leg; extension of thigh

O: ischial tuberosity

I: head of fibula

both human and cat

AOI of semitendinosus

A: flexion of leg; extension of thigh

O: ischial tuberosity

I: proximal shaft of tibia

both human and cat

AOI of semimembranosus

A: flexion of leg; extension of thigh

O: ischial tuberosity

I: medial condyle (tibia)

both human and cat