gluteal and thigh OIA Flashcards
Iliacus (iliopsoas) origin
superior 2/3 of iliac fossa, iliac
crest, ala of sacrum, anterior sacroiliac
ligaments
Iliacus (iliopsoas) insertion
Lesser trochanter and
shaft inferior, psoas
major tendon
Iliacus (iliopsoas) action
flexes thigh at hip and
stabilizes hip joint
Psoas Major
(iliospoas) origin
Transverse processes of lumbar
vertebrae, sides of bodies of T12-
L5, intervertebral discs
Psoas Major
(iliospoas) insertion
lesser trochanter
Psoas Major
(iliospoas) action
Flexes hip, flexes vertebral column laterally, blanace trunk in sitting position, flexes trunk
Psoas Minor origin
Vertebral margins T12-L1,
corresponding vertebral discs
Psoas Minor insertion
Pectineal line,
iliopectineal
eminence
Psoas Minor action
Flexes pelvis on
vertebral column
Gluteus maximus origin
ilium posterior to posterior gluteal line,
dorsal surface of sacrum and
coccyx,
sacrotuberous ligament
Gluteus maximus insertion
Most: iliotibial tract
to lateral condyle of
tibia Some: gluteal
tuberosity of femur
Gluteus maximus action
Extends flexed thigh,
assists in lateral
rotation, and abducts
the thigh
Gluteus Medius origin
lateral surface of the ilium between
anterior and posterior gluteal lines
Gluteus Medius insertion
lateral surface of
greater trochanter
Gluteus Medius action
abducts and medially rotates thigh at hip, steadies pelvis on leg when opposition leg is raised
Gluteus Minimus origin
Lateral surface of ilium between
anterior and inferior gluteal lines
Gluteus Minimus insertion
Anterior surface of
greater trochanter
Gluteus Minimus action
abducts and medially rotates thigh at hip, steadies pelvis on leg when opposition leg is raised
Piriformis origin
Anterior surface of sacral segments
2-4
Piriformis insertion
superior border of
greater trochanter
Piriformis action
laterally rotates
extended thigh,
abducts flexed thigh at
hip
Superior gemellus origin
outer surface of ischial spine
Superior gemellus insertion
medial surface of
greater trochanter
Superior gemellus action
laterally rotates
extended thigh at the
hip
obturator internus origin
pelvic surface of obturator
membrane and surrounding bone
obturator internus insertion
medial surface of
greater trochanter
obturator internus action
laterally rotates
extended thigh,
abducts flexed thigh at
hip
inferior gemellus origin
ischial tuberosity
inferior gemellus insertion
medial surface of
greater trochanter
inferior gemellus action
laterally rotates
extended thigh at hip
Quadratus femoris origin
lateral margin of ischial tuberosity
Quadratus femoris insertion
quadrate tubercle on
intertrochanter crest