2026 mm of gluteal region and post thigh

origin of gluteus maximus

external surface of ilium posterior to the posterior gluteal line, dorsal surface of sacrum and coccyx, and sacrotuberous ligament

insertion of gluteus maximus

iliotibial tract to lateral condyle of tibia, and gluteal tuberosity of femur

action of gluteus maximus

extends hip, assists in lateral rotation of hip

innervation of gluteus maximus

inferior gluteal n L5-S2

origin of gluteus medius

external surface of ilium between anterior and posterior gluteal lines

insertion of gluteus medius

lateral surface of greater trochanter of femur

action of gluteus medius

abducts and medially rotates hip

innervation of gluteus medius

superior gluteal n L4-S1

origin of gluteus minimus

external surface of ilium between anterior and inferior gluteal lines

insertion of gluteus minimus

anterior surface of greater trochanter of femur

action of gluteus minimus

abducts and medially rotates hip

innervation of gluteus minimus

superior gluteal n L4-S1

origin of tensor fascia lata (TFL)

anterior superior iliac spint (ASIS) and anterior part of iliac crest

insertion of tensor fascia lata (TFL)

iliotibial tract to lateral condyle of tibia

action of tensor fascia lata (TFL)

abducts and medially rotates hip, assists w hip flexion, assists w knee extension

innervation of tensor fascia lata (TFL)

superior gluteal n L4-S1

origin of piriformis

anterior surface of sacrum and sacrotuberous ligament

insertion of piriformis

superior border of greater trochanter of femur

action of piriformis

laterally rotates extended hip, horizontally abducts flexed hip

innervation of piriformis

ventral rami of S1-2

origin of obturator internus

margins of obturator foramen (deep surface) and obturator membrane

insertion of obturator internus (posterior)

medial surface of greater trochanter of femur (trochanteric fossa)

action of obturator internus

laterally rotates extended hip, horizontally abducts flexed hip

innervation of obturator internus

N. to obturator internus L5-S1

origin of superior gemellus

ischial spine

insertion of superior gemellus

medial surface of greater trochanter of femur (trochanteric fossa)

action of superior gemellus

laterally rotates extended hip, horizontally abducts flexed hip

innervation of superior gemellus

N. to obturator L5-S1

origin of inferior gemellus

ischial tuberosity

insertion of inferior gemellus

medial surface of greater trochanter of femur (trochanteric fossa)

action of inferior gemellus

laterally rotates extended hip, horizontally abducts flexed hip

innervation of inferior gemellus

N. to quadratus femoris L5-S1

origin of quadratus femoris

lateral border of the ischial tuberosity

insertion of quadratus femoris

intertrochanteric crest of femur

action of quadratus femoris

laterally rotates extended hip

innervation of quadratus femoris

N. to quadratus femoris L5-S1

origin of semitendinosus

ischial tuberosity

insertion of semitendinosus

superior part of medial surface of tibia (pes anserine)

action of semitendinosus

extends hip, flexes knee, medially rotates knee when flexed

innervation of semitendinosus

tibial division of sciatic n. L5-S2

origin of semimembranosus

ischial tuberosity

insertion of semimembranosus

posterior part of medial tibial condyle

action of semimembranosus

extends hip, flexes knee, medially rotates knee when flexed

innervation of semimembranosus

tibial division of sciatic n. L5-S2

origin of biceps femoris-long head

ischial tuberosity

insertion of biceps femoris-long head

lateral side of head of fibula

action of biceps femoris-long head

extends hip, flexes knee, laterally rotates when knee is flexed

innervation of biceps femoris-long head

tibial division of sciatic n. L5-S2

origin of biceps femoris- short head

linea aspera and lateral supracondylar line of femur

insertion of biceps femoris- short head

lateral side of head of fibula (merged tendon w long head)

action of biceps femoris-short head

flexes knee, laterally rotates knee when flexed

innervation of biceps femoris-short head

common peroneal division of sciatic n. L5-S2