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Gluteal and Hip
Muscles
39
Anatomy
Professional
11/05/2011

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Term
What is the origin of the Gluteus Maximus Muscle?
Definition
outer surface of ilium at posterior gluteal line, posterior surface of the sacrum and coccyx and from the sacrotuberous ligament
Term
What is the insertion of the gluteus maximus muscle?
Definition
iliotibial tract and some deep fibers at the gluteal tuberosity of femur
Term
What is the nerve supply of the gluteus maximus muscle?
Definition
inferior gluteal nerve (L5, S1-2)
Term
What is the blood supply of gluteus maximus muscle?
Definition
inferior gluteal artery
Term
What is the action of the gluteus maximus muscle?
Definition
extends and laterally rotates the thigh and assists in rising from a sitting position
Term
What is the origin of the gluteus medius muscle?
Definition
outer surface of the ilium, below the iliac crest, between the posterior gluteal and anterior gluteal lines
Term
What is the insertion of the gluteus medius muscle?
Definition
lateral surface of greater trochanter
Term
What is the nerve supply of the gluteus medius muscle?
Definition
superior gluteal nerve (L4-5, S1)
Term
What is the action of the gluteus medius muscle?
Definition
ABDUCTS the thigh, and medially rotates thigh (anterior fibers) and with gluteus minimus muscle it is important in walking and running and keeping a level pelvis
Term
What is the blood supply of the gluteus medius muscle?
Definition
superior gluteal artery
Term
What is the origin of the gluteus minimus muscle?
Definition
outer surface of the ilium between anterior and inferior gluteal lines
Term
What is the insertion of the gluteus minimus muscle?
Definition
anterior surface of the greater trochanter
Term
What is the nerve supply of the gluteus minimus muscle?
Definition
superior gluteal nerve (L4-5, S1)
Term
What is the action of the gluteus minimus muscle?
Definition
abducts the thigh and anterior fibers medially rotate the thigh and helps to maintain a level pelvis
Term
What is the origin of the tensor fasciae latae?
Definition
outer edge of iliac crest and between ASIS and iliac tubercle
Term
What is the insertion of the tensor fasciae latae muscle?
Definition
iliotibial tract
Term
What is the nerve supply of the tensor fasciae latae?
Definition
superior gluteal nerve (L4-5, S1)
Term
What is the action of the tensor fasciae latae?
Definition
assists the gluteus maximus muscle in extending the knee joint and keeping the knee extended (can also flex and medially rotate the thigh)
Term
Where does the piriformis muscle pass through?
Definition
greater sciatic foramen
Term
What is the origin of the piriformis muscle?
Definition
anterior surface of 2nd, 3rd, and 4th sacral vertebrae within the pelvis
Term
What is the insertion of the piriformis muscle?
Definition
upper border of greater trochanter
Term
What is the nerve supply of the piriformis muscle?
Definition
ventral rami of S1-2 spinal nerves
Term
What is the action of the piriformis muscle?
Definition
laterally rotates the thigh at the hip joint
Term
What is the origin of the superior gemellus muscle?
Definition
ischial spine
Term
What is the insertion of the superior gemellus muscle?
Definition
obturator internus tendon, which inserts into the upper border of greater trochanter
Term
What is the nerve supply to the superior gemellus muscle?
Definition
nerve to the obturator internus (L5, S1-2)
Term
What is the action of the superior gemellus?
Definition
laterally rotates the thigh at the hip joint
Term
What is the origin of the inferior gemellus?
Definition
upper margin of the ischial tuberosity
Term
What is the insertion of the inferor gemellus?
Definition
obturator internus tendon, then to greater trochanter with superior gemellus muscle
Term
What is the nerve supply of the inferior gemellus?
Definition
nerve to the quadratus femoris (L4-5, S1)
Term
What is the action of the inferior gemellus?
Definition
laterally rotator of the thigh at the hip joint
Term
What is the origin of the obturator internus muscle?
Definition
pelvic surface of the obturator membrane and surrounding bones
Term
What is the insertion of the obturator internus?
Definition
upper border of greater trochanter with inferior and superior gemellus muscles
Term
What is the nerve supply of the obturator internus?
Definition
nerve to obturator internus muscle (L5, S1-2)
Term
What is the action of the obturator internus?
Definition
laterally rotates the thigh at the hip joint
Term
What is the origin of the quadratus femoris?
Definition
lalteral border of ischial tuberosity
Term
What is the insertion of the quadratus femoris?
Definition
intertrochanteric crest of the femur
Term
What is the nerve supply of the quadratus femoris?
Definition
nerve to quadratus femoris muscle (L4-5, S1)
Term
What is the action of the quadratus femoris?
Definition
laterally rotates the thigh at the hip joint
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