Week 7 Muscles - Gluteal Region

Gluteus Maximus origin

posterior iliac crest, edge of sacrum, cocccyx, sacrotuberous and sacroiliac ligament

Gluteus Maximus insertion

IT band and gluteal tuberosity

Gluteus Maximus innervation

inferior gluteal nerve (L5-S2)

Gluteus Maximus blood supply

superior and inferior gluteal arteries

Gluteus Maximus action

hip extension and external rotation

Gluteus Maximus purposeful activity

ballroom dancing, gymnastics

Gluteus Medius origin

external ilium between anterior and posterior gluteal lines

Gluteus Medius insertion

lateral surface of greater trochanter of femur

Gluteus Medius innervation

superior gluteal nerve (L4-S1)

Gluteus Medius blood supply

superior gluteal artery

Gluteus Medius action

hip abduction, pelvic stabilization(unilateral stance), anterior fibers:flex/internal rotation posterior fibers:extend/external rotation

Gluteus Medius purposeful activity

walking, single-leg stance, yoga

Gluteus Minimus origin

external ilium between anterior and inferior gluteal lines

Gluteus Minimus insertion

anterior surface of greater trochanter of femur

Gluteus Minimus innervation

superior gluteal nerve (L4-S1)

Gluteus Minimus blood supply

superior gluteal artery

Gluteus Minimus action

hip abduction, medial rotation, pelvic stabilization(unilateral stance)

Gluteus Minimus purposeful activity

ice skating, taichi

Tensor Fascia Lata origin

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

Tensor Fascia Lata insertion

IT band(iliotibial tract) which attaches to lateral condyle of tibia(Gerdy's Tubercle)

Tensor Fascia Lata innervation

superior gluteal nerve (L4-S1)

Tensor Fascia Lata blood supply

superior gluteal artery

Tensor Fascia Lata action

hip flexion, abduction, and medial rotation

Tensor Fascia Lata purposeful activity

running, cycling

Piriformis origin

anterior surface of 2-4th sacral segments, superior margin of greater sciatic notch and sacrotuberous ligament

Piriformis insertion

superior border of greater trochanter of femur

Piriformis innervation

anterior rami (S1-S2)

Piriformis blood supply

superior gluteal artery

Piriformis purposeful activity

getting out of a car

Most insertions of gluteal region is

greater trochanter of femur