Gluteal region Flashcards
the greater sciatic foramen is communication between what
main pelvic cavity and gluteal region
the lesser sciatic foramen is communication between what
gluteal region and perineum
where does the iliotibial tract run from?
tubercle of iliac crest to lateral condyle of tibia
what does a + Trrendelenburg’s sign tell you?
paralysis of gluteus medius and/or minimus
the pelvis is sink to the unsupported side when walking
how does the piriformis exit the pelvis
greater sciatic foramen
what is the only muscle that enters or passes through the lesser sciatic foramen
obturator internus muscle
what makes up the sciatic nerve (ie what roots)?
ventral rami of L4, L5, S1- S3
what does the sciatic nerve enter the gluteal region through?
GREATER sciatic foramen
Origin of gluteus maximus
Outer surface of ilium, posterior surface of sacrum + coccyx, sacrotuberous ligament
insertion of gluteus maximus
iliotibial tract or gluteal tuberosity of femur
innervation of gluteus maximus
inferior gluteal nerve
action of gluteus maximus
extension and laterla rotation of thigh at hip
extension of trunk
origin of gluteus minimus
outer surface of ilium
insertion of gluteus minimus
anterior surface of greater trochanter
action of gluteus minimus
abduction + medial rotation of thigh at hip
Helps steady pelvis of supporting limb during walking
innervation of gluteus minimus
superior gluteal nerve
origin of gluteus medius
outer surface of ilium
insertion of gluteus medius
lateral surface of greater trochanter
action of gluteus medius
abduction + medial rotation of thigh at hip
Helps steady pelvis of supporting limb during walking
innervation of gluteus medius
superior gluteal nerve
origin of piriformis
2nd, 3rd, and 4th sacral vertebrae in the pelvis
insertion of piriformis
upper border of greater trochanter
action of piriformis
lateral rotation of thigh at hip
innervation of piriformis
ventral rami of s1 and s2
origin of obturator internus
pelvic surface of obturator membrane
insertion of obturator internus
medial surface of greater trochanter
action of obturator internus
lateral rotation of thigh at hip
innervation of obturator internus
nerve to obturator internus
origin of superior gemellus
ischial spine
insertion of the superior gemellus
w/ obturator internus into medial surface of greater trochanter
action of the superior gemellus
lateral rotation of thigh at hip
innervation of the superior gemellus
nerve to obturator internus
origin of the inferior gemellus
ischial tuberosity
insertion of the inferior gemellus
w/ obturator internus into medial surface of greater trochanter
action of the inferior gemellus
lateral rotation of thigh at hip
innervation of the inferior gemellus
nerve to quadratus femoris
origin of the quadratus femoris
lateral border of ischial tuberosity
insertion of the quadratus femoris
quadrate tubercle
action of the quadratus femoris
lateral rotation of thigh at hip
innervation of the quadratus femoris
nerve to quadratus femoris
what divisions make up the tibial part of the sciatic nerve
anterior divisions of L4-S3 ventral rami
what divisions make up the common fibular part of the sciatic nerve
posterior divisions of L4-S2 ventral rami
what divisions make up the posterior cutaneous nerve of the thigh
anterior divisions of S2 and S3 ventral rami
posterior divisions of S1 and S2 ventral rami
what are the branches of the posterior cutaneous nerve of the thigh
gluteal branches
perineal branches
cutaneous branches
All nerves of the gluteal regions pass through greater sciatic foramen except which two also pass through lesser?
nerve to obturator internus
pudendal nerve
what are the two main arteries of the gluteal region?
internal pudendal artery
superior and inferior gluteal
