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Scatter: Comparative Anatomy - Cat - Muscles - Thigh - Deep Pelvic

Obturator internus

Origin - Ramus of ischium. Insertion - Tendon of obturator internus. Action - Abducts thigh.

Piriformis

Origin - Sacral and caudal vertebrae. Insertion - Greater trochanter of femur. Action - Abducts thigh.

Gemellus superior

Origin - ilium and ischium. Insertion - Greater trochanter of femur. Action - Rotates and abducts thigh.

Gemellus inferior

Origin - Lateral surface of the ischium. Insertion - Tendon of obturator internus. Action - Abducts thigh.

Obturator externus

Origin - Ramus of pubis and ischium. Insertion - Trochanteric fossa of femur. Action - Rotates and flexes thigh.

Quadratus femoris

Origin - Tuberosity of ischium. Insertion - Greater and lesser trochanter. Action - Extends and rotates thigh.

Gluteus minimus

Origin - Ventral half of ilium. Insertion - Greater trochanter of femur. Action - Rotates thigh.

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Gemellus inferior	Origin - Lateral surface of the ischium. Insertion - Tendon of obturator internus. Action - Abducts thigh.
Gemellus superior	Origin - ilium and ischium. Insertion - Greater trochanter of femur. Action - Rotates and abducts thigh.
Gluteus minimus	Origin - Ventral half of ilium. Insertion - Greater trochanter of femur. Action - Rotates thigh.
Obturator externus	Origin - Ramus of pubis and ischium. Insertion - Trochanteric fossa of femur. Action - Rotates and flexes thigh.
Obturator internus	Origin - Ramus of ischium. Insertion - Tendon of obturator internus. Action - Abducts thigh.
Piriformis	Origin - Sacral and caudal vertebrae. Insertion - Greater trochanter of femur. Action - Abducts thigh.
Quadratus femoris	Origin - Tuberosity of ischium. Insertion - Greater and lesser trochanter. Action - Extends and rotates thigh.

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