Quizlet Comparative Anatomy - Cat - Muscles - Thigh - Deep Pelvic

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