Hip Joint Complex Muscles Only

Question 1

Hip Flexion

Answer 1

90 degrees when knee is extended- limited by passive insufficiency of hamstrings

Primary: Iliopsoas
Secondary: Rectus Femoris, Tensor Fascia Latae, Sartorius
Dependent on Hip Position: Pectineus, Adductor longus, Adductor magnus, Gracilis, Gluteus Minimus (anterior fiber)

Question 2

Hip Extension

Answer 2

Primary: Gluteus Maximus
Secondary: (Hamstrings) Semitendinosus, Semimembranosus, Long Head of Biceps Femoris
Dependent on Hip Position: Gluteus medius (posterior fibers), Adductor magnus (posterior fibers), piriformis

Question 3

Abduction

Answer 3

Limited by gracilis
Primary: Gluteus medius
Secondary: Gluteus minimus, Tensor fascia latae
Dependent on Hip Position: Piriformis (when Hip is flexed), Sartorius, Rectus Femoris, Superior Fibers of Gluteus Maximus

Question 4

Adduction

Answer 4

Limited by Tensor Fascia Latae (and associated IT band)
Primary: Adductor magnus
Secondary: Pectineus, Adductor Longus, Adductor Brevis, Gracilis, Obturator Externus

Question 5

Lateral Rotation

Answer 5

Primary: Gluteus maximus, piriformis
Secondary: Quadratus femoris, obturator internus and externus, Gemellus superior and inferior, sartorius
Depending on hip position: Gluteus medius (posterior fibers); long head of biceps femoris

Question 6

Medial Rotation

Answer 6

NO MUSCLE HAS A PRIMARY ROLE OF MEDIAL ROTATION
Secondary: Tensor Fascia Latae, Gluteus minimus, Gluteus medius (anterior fibers)
Dependent on Hip position: Pectineus, Adductor longus and brevis, adductor magnus (posterior fibers), semimembranosus, semitendinosus