A&P Lab Exam 1 Functions (Muscles)

gluteus maximus

extension of thigh at hip , lateral rotation of thigh at hip

gluteus medius and gluteus minimus

abduction and medial rotation of thigh at hip

piriformis, obturator internus (tendon), gemelli

lateral rotation of extended thigh at hip, abduction of flexed thigh at the hip

quadratus femoris

laterally rotates thigh at hip, adduction of thigh

semitendinosus and semimembranosus

extension of thigh at hip, flexion of leg at knee and rotates medially

biceps femoris (long/short head)

flexion of leg at knee and rotates it laterally, extension of thigh at hip

tensor fasciate latae

abduction of thigh at hip, medial rotation of thigh at hip

sartorius

abduction of thigh at hip, flexion of thigh at hip; lateral rotation of thigh at hip joint and flexion of knee joint (crisscross applesauce motion)

rectus femoris

extension of leg at knee joint and flexion of thigh at hip

vastus lateralis, vastus medialis, vastus intermedius

extension of leg at knee joint

pectineus

adduction of thigh at hip, flexion of thigh at hip

adductor longus

adduction of thigh at hip; external/lateral rotation and flexion of thigh at hip

adductor brevis

adduction of thigh at hip; extension of thigh at hip

adductor magnus

adduction of thigh at hip; flexion of thigh at hip

gracilis

adduction of thigh at hip; flexion of leg at knee; assists in medial rotation

quadriceps

extension of knee, flexion of hip

illiopsoas

flexion of hip joint, external rotation of femur; flexor of thigh and trunk

gastrocnemius

plantarflexion, flexion of leg at knee joint

soleus

plantarflexion of foot at ankle, steadies leg on foot

plantaris

plantarflexion, flexion of knee

popliteus

flexion of leg at knee; unlocks knee

flexor hallucis longus

flexion of great toe, plantarflexion

flexor digitorum longus

flexion of lateral 4 digits, plantarflexion

tibialis posterior

plantarflexion, inversion of foot

tibialis anterior

dorsiflexion of foot, inversion of foot

extensor hallucis longus

extends great toe, dorsiflexion

extensor digitorum longus

extends lateral four digits, dorsiflexion

fibularis tertius

dorsiflexion, eversion of foot

fibularis longus and fibularis brevis

eversion of foot, plantarflexion

extensor digitorum brevis

extension of toes 2-4

extensor hallucis brevis

extension of great toe

flexor digitorum brevis

flexes lateral four digits at interphalangeal joints

Abductor Hallucis

abducts and flexes great toe

Abductor Digiti Minimi

abducts and flexes little toe

Flexor Digiti Minimi Brevis

flexes proximal phalanx of little toe

Quadratus Plantae

assists flexor digitorum longus in flexing lateral four digits

Adductor hallucis (transverse/oblique head)

adducts great toe; assists in maintaining transverse arch of the foot

Lumbricals

flexion of proximal phalanges; extension of middle and distal phalanges of lateral four digits