Principles of Functional Exercise

PECTINEuS

Joint Action performed by the Hip

1.Adduction

2. Horizontal Adduction


3. Flexion (initial)

Origin: Pubis – upper border

Insertion: Femur – below trochanter

HIP ExTERNAL ROTATORS

I. Piriformis

II. Gemellus Superior

III. Obturator Internus

IV. Gemellus Inferior

V. Obturator Externus

VI. Quadratus Femoris

Joint Action performed by the Hip

1. External Rotation (I,II,III,IV,V,VI)


2. Horizontal abduction (I,V)

Origin: 1. Sacrum – A. Anterior (I) B. Sacrotuberous ligament (I)

2. Ischium – Posterior portions – A. Ischial spine (II) B. Ischial tuberosity C. Posterior
   portion (IV) D. External border (VI) E. Obturator foramen (V,VI)


3. Ischium and pubis – inside surface and obturator membrane (III)

Insertion: Femur – Greater Trochanter – A. Medial surface (II,III,IV) B. Superior/medial spine (I)
C. Posterior surface D. Quadrate tubercle (VI) E. Trochanteric fossa (V)

Common distortions due to tightness include restricted internal rotation of the hip, winging of
the foot (toe-out) during gait, and may cause sciatic nerve impingement