KP221 Lecture Notes - Lecture 31: Superior Gluteal Nerve, Tensor Fasciae Latae Muscle, Internal Obturator Muscle

• School: WLU
• Department: Kinesiology & Physical Education
• Course: KP221
• Professor: Michael Cinelli

Document Summary

Sacral plexus (yellow = posterior, green = anterior) Gluteus maximus gluteal (l4-s2: largest of gluteal muscles, most superficial, muscles fibers stretch when flex, powerful extensor at hip joint, origin: sacrum, dorsal sacroiliac ligaments, small area of ilium and sacrotuberous ligament. Intermediate in size (between max. and min. : origin: major part of upper lateral surface of wing of ilium and covering fascia. Insertion: greater trochanter: action: strong abductor of thigh, (anterior fibers) flex and medial rotation of thigh, (posterior fibers) extend and laterally rotate thigh, prevents trunk from falling over, pushes it toward swing limb (with min. ) Gluteus minimus: smallest of gluteal muscles, inferior to gluteus maximus and medius, similar components to g. medius, origin: lower part of lateral wing of ilium. Insertion: greater trochanter: action: strong abductor of thigh, medially rotate thigh, (flexion of thigh, fibers do(cid:374)"t exte(cid:374)d as far as (cid:373)edius. **all gluteal muscles contribute to initiate movement (move from standing position)