1. TENSOR FASCIA LATA Origin:
anterior aspect of iliac crest
anterior superior iliac spine (ASIS)
Insertion: anterior aspect of IT band, below greater trochanter
Action:
hip flexion
medially rotate & abduct a flexed thigh
tenses IT tract to support femur on the tibia during standing
Blood:
superior gluteal artery
lateral femoral circumflex artery
Nerve: superior gluteal nerve, L4,5,S1

2. TENSOR FASCIA LATA (cont’d)

3. GLUTEUS MAXIMUS Origin: Insertion: Action: Blood:
outer rim of ilium (medial aspect)
dorsal surface of sacrum and coccyx
sacrotuberous ligament
Insertion:
IT band (primary insertion)
gluteal tuberosity of femur
Action:
powerful extensor of hip
laterally rotates thigh
upper fibers aid in abduction of thigh
fibers of IT band stabilize a fully extended knee
Blood:
inferior gluteal artery (primary)
superior gluteal artery
Nerve: inferior gluteal nerve, L5,S1,2

4. GLUTEUS MAXIMUS (cont’d)

5. GLUTEUS MEDIUS Origin:
outer aspect of ilium (between iliac crest and anterior and posterior gluteal lines)
upper fascia (AKA gluteal aponeurosis)
Insertion: superior aspect of greater trochanter
Action:
anterior and lateral fibers abduct and medially rotate the thigh
posterior fibers may laterally rotate thigh
stabilizes the pelvis and prevents free limb from sagging during gait
Blood: superior gluteal artery
Nerve: superior gluteal nerve, L4,5,S1

6. GLUTEUS MEDIUS (cont’d)

7. GLUTEUS MINIMUS
Origin: outer aspect of ilium (between anterior and inferior gluteal lines)
Insertion:
greater trochanter (anterior to medius)
articular capsule of hip joint
Action:
abduct and medially rotate the thigh
stabilizes the pelvis and prevents free limb from sagging during gait
Blood: superior gluteal artery
Nerve: superior gluteal nerve, L4,5,S1

8. GLUTEUS MINIMUS (cont’d)

9. GLUTEAL MUSCLES

10. PIRIFORMIS Origin: pelvic surface of sacrum (anterior portion)
Insertion: medial surface of greater trochanter (through greater sciatic foramen)
Action:
lateral rotation of extended thigh
abducts a flexed thigh
Blood:
superior gluteal artery
inferior gluteal artery
Nerve: nerve to piriformis, S1,2

11. PIRIFORMIS (cont’d)