Anatomy
Origin:
Upper part of the ischial tuberosity, immediately below the groove for the obturator internus tendon.
Insertion:
Blends with the more posterior fibres of the tendon of the obturator internus and attaches with the tendon to the medial surface of the greater trochanter of the femur.
Key Relations:
Lies inferior to the obturator internus muscle.
Functions
Working with gemellus superior and obturator internus, laterally rotates the extended thigh and abducts the flexed thigh at the hip joint.
Supply
Nerve Supply:
Nerve to quadratus femoris (L5, S1).
Blood Supply:
-Branches of the internal iliac arteries including the superior and inferior gluteal arteries
-Internal pudenal artery.
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