Pelvic Girdle Origin, Insertion, and Action: UMW Anatomy

gluteus maximus

origin: iliac crest, illium, sacrum, and coccyx. insertion gluteal tuberosity of femur. action: extenstion and lateral rotation at the hip, helps stablilize the extended knee, abduction at the hip

gluteus medius

origin: iliac crest. insertion: Greater trochanter. action: abduction and rotation of the hip

gluteus minimus

origin: illium. insertion: greater trochanter. action: abduction and medial rotation of the hip.

tensor fasciae (iliotibial tract)

origin: anterior superior iliac spine. Insertion: lateral tibia. action: extension of the leg, medial rotation of the thigh

piriformes

origin: sacrum. insertion: greater trochanter. action: abduction and lateral rotation

superior gemellus

origin: ischial spine. Insertion: greater trochanter. action: abduction and lateral rotation of the hip

inferior gemellus

origin: ischial tubercle. insertion: greater trochanter. action: abduction and lateral rotation of the hip

quadratus femoris

origin: ischial tuberosity. insertion: intertrochanteric line. action: lateral rotation

obturators internus

origin: obturator foramen. Insertion: greater trochanter. action: abduction and lateral rotation

obturators externus

origin: obturator foramen. Insertion: trochanter fossa. action: abduction and lateral rotation.

adductor brevis

origin: inferior pubic ramus. insertion: linea aspera. action: adduction and flexion

adductor longus

origin: superior pubic ramus. insertion: linea aspera. action: adduction and flexion

adductor mangus

origin: inferior pubic ramus. insertion: linea aspera. action adduction, flexion, and medial rotation

pectineus

origin: superior pubic ramus. Insertion: femur. action: hip flexion and extension

gracilis

origin:inferior pubic ramus. Insertion: medial tibia. action: flexion and medial rotation of the knee, adduction and rotation of the hip

biceps femoris

origin: ischeal tuberosity (long head) and linea aspera of the femur (short head). Insertion: head of fibula, lateral condyle of tibia. action: flexion at the knee, extension and lateral rotation at the hip

semimembranous

origin: ischeal tuberosity. insertion: medial condyle of the tibia. action: flexion at the knee, extension and medial rotation of the hip

Semitendinosus

Origin: ischial tuberosity. Insertion: the tibia. Action: flexion at the knee, extension and medial rotation of the hip

psoas minor

Origin: bodies and discs of T12 and L1. Insertion: Iliopubic eminence. Action: flexor of the lumbar vertebral column

iliacus

Origin: iliac fossa. Insertion: lesser trochanter. Action: flexion at the hip and when working with the psoas major, flexes the intervertebral joints

psoas major

Origin: T12- L4 bodies. Insertion: lesser trochanter. Action: flexion at the hip and or lumbar intervertebral joints

sartorius

Origin: superior, anterior iliac spine. Insertion: medial tibia. Action: flexion at the knee, abduction, flexion, and lateral rotation at the hip

articularis genus

Origin: distal femur. Insertion: suprapatellar bursa. Action: pulls the suprapatellar bursa and synovial membrane upward during knee extension

rectus femoris

Origin: anterior inferior iliac spine. Insertion: patella and tibial tuberosity. Action: extension at the knee, flexion at hip

vastus intermedius

Origin: femur and linea aspera. Insertion: tibial tuberosity and patella. Action: extension at the knee

vastus lateralis

Origin: femur and linea aspera. Insertion: tibial tuberosity and patella. Action: extension at the knee

vastus medialis

Origin: linea aspera. Insertion: tibial tuberosity and patella. Action: extension at the knee

gastrocnemius

Origin: femoral condyles. Insertion: calcaneus. Action: plantar flexion at ankle, flexion at knee

soleus

Origin: fibula and tibia. Insertion: calcaneus. Action: plantar flexion at ankle, postural muscle when standing

plantaris

Origin: lateral supracondylar ridge. Insertion: calcaneus. Action: plantar flexion at ankle, flexion at knee

tibialis posterior

Origin: interosseous membrane, tibia, fibula. Insertion: navicular, all three cuneiforms, cuboid, second, third, and fourth metatarsal bones. Action: inversion of foot, plantar flexion at ankle

popliteus

Origin: lateral condyle of femur. Insertion: tibia. Action: medial rotation of tibia (or lateral rotation of the femur) at the knee, flexion at the knee

tibialis anterior

Origin: lateral condyle of tibia. Insertion: first metatarsal and medial cuneiform. Action: dorsiflexion at the ankle, inversion of the foot.

fibularis tertius

Origin: fibula and interosseous membrane. Insertion: fifth metatarsal. Action: weak dorsiflexion, weak eversion at the subtalar joint

fibularis longus

Origin: fibula. Insertion: 5th metatarsal bone and medial cuneiform. Action: eversion of the foot and plantar flexion at the ankle

fibularis brevis

Origin: fibula. Insertion: 5th metatarsal. Action: eversion of the foot and plantar flexion at the ankle

flexor digitorum longus

Origin: tibia. Insertion: distal phalanges 2-5. Action: flex toes

flexor hallucis longus

Origin: fibula. Insertion: distal phalanx of hallux. Action: flex big toe

extensor digitorum longus

Origin: tibia and fibula. Insertion: distal phalanx toes 2-5. Action: extend toes

extensor hallucis longus

Origin: fibula. Insertion: distal phalanx of the hallux. Action: extend big toe.

extensor digitorum brevis

Origin: calcaneus. Insertion: toes 2-5. Action: extends the toes

extensor hallucis brevis

Origin: calcaneus. Insertion: dorsal hallux. Action: extend the big toe.

abductor hallucis

Origin: calcaneus. Insertion: medial side of hallux. Action: abduct the big toe

Flexor hallucis brevis

Origin: calcaneus and cuboid. Insertion: medial side of the hallux. Action: flex the big toe.

flexor digitorum brevis

Origin: dorsal calcaneus. Insertion: dorsal side of toes 2-5 Action: flex toes 2-5

lumbricales

Origin: tendons of the flexor digitorum longus. Insertion: insertions of extensor digitorum longus. Action: flexion at the metatarsophalengeal joints, extension at interphalangeal joints of toes 2-5

dorsal interosseus

Origin: side of metatarsal bones. Insertion: medial and lateral sides of toe 2, lateral sides of toes 3 and 4. Action: abduction at mateatarsophalangel joints of toes 3 and 4, flexion of metatarsophalengeal joints and extension of interphalengeal joints of toes 2-4.

plantar interosseus

Origin: bases and medial sides of metatarsal bones. Insertion: medial sides of toes 3-5. Action: adduction of metatarsophalangeal joints of toes 3-5, flexion of the metatarsophalangeal joints and extension of the interphalengeal joints