Gluteal and Thigh Muscle OIA

Iliacus Origin

iliac fossa; iliac crest; ala of sacrum

Iliacus Insertion

lesser trochanter; body of femur

Iliacus Action

flexes hip

Psoas Major Origin

lumbar transverse processes; bodies of T12-L5

Psoas Major Insertion

lesser trochanter

Psoas Major Action

flexes hip, laterally flexes lumbar spine, balance trunk in sitting position, flexes lumbar spine

Tensor Fasciae Latae Origin

anterior iliac spine; anterior iliac crest

Tensor Fasciae Latae Insertion

lateral condyle of tibia via iliotibial tract

Tensor Fasciae Latae Action

flexes hip, abducts hip, internally rotates hip

Sartorius Origin

anterior superior iliac spine and notch inferior

Sartorius Insertion

superior part of medial surface of tibia

Sartorius Action

flexes hip, abducts hip, externally rotates hip, flexes knee, internally rotates knee

Pectineus Origin

superior ramus of pubis

Pectineus Insertion

pectineal line of femur

Pectineus Action

flexes hip, adducts hip

Adductor Longus Origin

body of pubis inferior to pubic crest

Adductor Longus Insertion

middle of linea aspera

Adductor Longus Action

adducts hip

Gracilis Origin

pubic body and inferior ramus

Gracilis Insertion

superior part of medial surface of tibia

Gracilis Action

adducts hip, flexes knee, internally rotates knee

Adductor Brevis Origin

pubic body and inferior ramus

Adductor Brevis Insertion

pectineal line; proximal linea aspera

Adductor Brevis Action

adducts hip

Adductor Magnus Origin

ischiopubic ramus; ischial tuberosity

Adductor Magnus Insertion

gluteal tuberosity; linea aspera of femur; medial supracondylar line; adductor tubercle of femur

Adductor Magnus Action

flexes hip, adducts hip, extends hip

Rectus Femoris Origin

anterior inferior iliac spine; ilium superior to acetabulum

Rectus Femoris Insertion

tibial tuberosity via patellar ligament

Rectus Femoris Action

flexes hip, extends knee

Vastus Intermedius Origin

anterior and lateral surfaces of body of femur

Vastus Intermedius Insertion

tibial tuberosity via patellar ligament

Vastus Intermedius Action

extends knee

Vastus Lateralis Origin

greater trochanter; gluteal tuberosity; lateral lip of linae aspera

Vastus Lateralis Insertion

tibial tuberosity via patellar ligament

Vastus Lateralis Action

extends knee

Vastus Medialis Origin

intertrochanteric line; medial lip of linae aspera

Vastus Medialis Insertion

tibial tuberosity via patellar ligament

Vastus Medialis Action

extends knee

Gluteus Maximus Origin

ilium posterior to posterior gluteal line; dorsal sacrum; dorsal coccyx; sacrotuberous ligament

Gluteus Maximus Insertion

gluteal tuberosity of femur; lateral condyle of tibia via iliotibial tract

Gluteus Maximus Action

extends flexed hip, abducts hip, externally rotates hip

Gluteus Medius Origin

gluteal surface of ilium between anterior and posterior gluteal lines

Gluteus Medius Insertion

lateral surface of greater trochanter

Gluteus Medius Action

abducts hip, internally rotates hip, stabilizes pelvis during single leg stance

Gluteus Minimus Origin

gluteal surface of ilium between anterior and inferior gluteal lines

Gluteus Minimus Insertion

anterior surface of greater trochanter

Gluteus Minimus Action

abducts hip, internally rotates hip

Piriformis Origin

anterior surface of sacral segments 2-4

Piriformis Insertion

superior border of greater trochanter

Piriformis Action

externally rotates extended hip, abducts flexed hip

Superior Gemellus Origin

external surface of ischial spine

Superior Gamellus Insertion

medial surface of greater trochanter

Superior Gamellus Action

externally rotates extended hip, abducts flexed hip

Obturator Internus Origin

margins of obturator foramen; pelvis surface of obturator membrane

Obturator Internus Insertion

medial surface of greater trochanter

Obturator Internus Action

externally rotates extended hip, abducts flexed hips

Inferior Gemellus Origin

ischial tuberosity

Inferior Gemellus Insertion

medial surface of greater trochanter

Inferior Gemellus Action

externally rotates extended hip, abducts flexed hip

Quadratus Femoris Origin

ischial tuberosity

Quadratus Femoris Insertion

quadrate tubercle

Quadratus Femoris Action

externally rotates hip

Obturator Externus Origin

margins of obturator foramen; external surface of obturator membrane

Obturator Externus Insertion

trochanteric fossa

Obturator Externus Action

externally rotates hip

Biceps Femoris Origin

Long Head: ischial tuberosity

Short Head: linae aspera and lateral supracondylar line of femur

Biceps Femoris Insertion

lateral surface of head of fibula

Biceps Femoris Action

extends hip, flexes knee, internally rotates knee

Semitendinosus Origin

ischial tuberosity

Semitendinosus Insertion

superior part of medial surface of tibia

Semitendinosus Action

extends hip, flexes knee, internally rotates knee

Semimembranosus Origin

ischial tuberosity

Semimembranosis Insertion

posterior of medial condyle of tibia

Semimembranosus Action

extends hip, flexes knee, internally rotates knee