Muscles of the Gluteal Region Flashcards
O/I of psoas major
Origin- transverse processes of all lumbar vertebrae + T12
Insert- lesser trochanter of the femur, medial to the insertion of the iliacus
innervation of psoas major
lumbar plexus L2-L3
function of psoas major
flexor at the hip
flexor of the lumbar spine
O/I of psoas minor
(inconstant muscle found on the anterior surface of the psoas major)
Origin- T12 and L1 vertebrae
insertion- iliac fascia
innervation of psoas minor
first lumbar nerve
function of psoas minor
flexion of lumbar spine
O/I of iliacus
origin- upper 2/3 of iliac fossa; iliac crest reachin ASIS and AIIS, superolateral portion of sacrum and from the anterior sacroiliac and iliolumbar ligaments
insertion- lesser trochanter of the femur
what structures attach to the lesser trochanter of the femur?
psoas major- more medial
iliacus
(together, it is the iliopsoas)
innervation of the iliacus
femoral nerve
action of the iliacus
flexion at the hip
O/I of gluteus maximus
origin- posterior gluteal line of the ilium and the bone superior and posterior to it; sacrotuberous ligament; aponeurosis of the sacrospinalis muscle
inserts- gluteal tuberosity (deep fibers) and IT band (proximal and superficial fibers)
innervation of gluteus maximus
inferior gluteal nerve (L5-S2)
function of gluteus maximus
extend, laterally rotates and abducts the thigh at the hip
O/I gluteus medius
origin- in between the posterior gluteal line and the anterior gluteal line
insertion- oblique bony ridge on the lateral surface of the greater trochanter
innervation of gluteus medius
superior gluteal nerve
function of gluteus medius
abductor of thigh
medially rotates an extended hip
stabilizes pelvis during locomotion
what lies in between the gluteus medius and minimus?
superior gluteal nerve
and the deep branches of the superior gluteal artery and veins
O/I of gluteus minimus
origin- in btwn the anterior and ifnerior gluteal lines and from the edge of the greater sciatic notch
insertion- anterior border of greater trochanter