Everyday Muscle.

Gluteus Medius

Hip & Pelvis
The 'Trendelenburg muscle' — if it's weak, your hip drops when you walk.
Function
Abducts and medially rotates hip, stabilizes pelvis during walking
Origin
External surface of ilium between anterior and posterior gluteal lines
Insertion
Lateral surface of greater trochanter
Innervation
Superior gluteal nerve (L4-S1)
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Iliopsoas Psoas Minor Gluteus Maximus Gluteus Minimus Piriformis Obturator Externus Obturator Internus Superior Gemellus Inferior Gemellus Quadratus Femoris