Gluteal region Flashcards
Attachments of gluteus maximus
ilium posterior to gluteal line, dorsal sacrum and coccyx, sacrotuberus ligament
iliotibial tract to the lateral codyle of tibia, gluteal tuberosity of femur
Attachments of gluteus medius
Ilium between ant/post gluteal lines
lat greater trochanter of femur
Attachments of gluteus minimus
Ilium between ant/post gluteal lines
ant greater trochanter of femur
Nerve supply of gluteus maximus
inferior gluteal (L5-S2)
Nerve supply of gluteus medius
Superior gluteal (L4-S1)
Nerve supply of gluteus minimus
Superior gluteal (L4-S1)
Action of Gluteus maximus
Extends thigh
assists in lateral rotation
steadies during rising from sitting
some extension of knee through iliotibial tract
Action of Gluteus medius
Abduction of thigh
Medial rotation of thigh
Action of Gluteus minimus
Abduction of thigh
Medial rotation of thigh
What is the iliotibial tract
Aponeurosis of tensor fasciae latae and gluteus maximus
from iliac tubercle to anterolateral tibial tubercle
allows TFL to act as abductor, medial rotator, flex of thigh
TFL and GM can support extension of knee
What are the attachments of piriformis
Ant S2-4, superior greater sciatic notch, sacrotuberous ligament
passes through greater sciatic foramen
superior border of greater trochanter of femur
Where is it safe to perform IM injections to avoid damage to sciatic nerve
Superolateral quadrant
What leaves through greater sciatic foramen superior to piriformis?
Superior gluteal nerves/ vessels
What leaves through the greater sciatic foramen inferior to piriformis
Post cutaneous nerve of thigh Inferior gluteal nerve/ vessels Nerve to quadratus femoris (L5-S1) Pudendal nerve Internal pudendal vessels Nerve to obturator internus (L5-S1) Sciatic nerve
What structures pass through the lesser sciatic foramen?
Pudendal nerve (leaves gluteal region) internal pudendal vessels obturator internus nerve to obturator internus
What are the attachments of obturator internus
Pelvic surface of ilium and ischium, obturator membrane
through lesser sciatic foramen
medial greater trochanter of head of femur
What are the actions of obturator internus?
lateral rotation of extended thigh
abduction of flexed thigh
hold femoral head in acetabulum
What are the attachments of the gemelli?
Superior- ischial spine
inferior- iscial tuberosity
medial greater trochanter of head of femur
What are the actions of the gemelli?
lateral rotation of extended thigh
abduction of flexed thigh
hold femoral head in acetabulum
What are the attachments of quadratus femoris?
lateral border of ischial tuberosity
quadrate tubercle on intertrochantric crest
What is the nerve supply to the gemelli?
Superior- nerve to obturator internus, L5/S1
inferior- nerve to quadratus femoris, L5/S1
What are the actions of quadratus femoris?
lateral rotation of thigh
steadies head of femur in acetabulum
