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Muscles of the Hip
action and nerve supply
23
Science
Graduate
09/27/2010

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Term
Psoas Major
Definition
Lumbar plexus L2-4

Hip flexion (origin fixed)
Trunk flexion (insertion fixed)
Assist lateral trunk flexion (unilateral)
May assist hip ER and ABD
Term
Psoas Minor
Definition
L1 spinal nerve

Flexion of trunk and lumbar spine
Term
Iliacus
Definition
Femoral nerve L2-L3

Hip flexion
Flexes pelvis on femur
Term
Pectineus
Definition
Femoral nerve L2-L3
Obturator nerve, Accessory branch (L3)

Hip adduction
Assist hip flexion
Term
Iliacus
Definition
Femoral nerve L2-L3

Hip flexion
Flexes pelvis on femur
Term
Gracilis
Definition
Obturator nerve (L2-L3)

Hip adduction
Knee flexion
Medial rotation of knee
Term
Adductor Longus
Definition
Obturator nerve (L2-L4)

Hip adduction
Assist hip flexion
Term
Adductor Brevis
Definition
Obturator nerve (L2-L4)

Hip adduction
Hip flexion
Term
Adductor Magnus
Definition
Obturator nerve (L2-L4)
Sciatic nerve (L2-L4)

Hip adduction
May assist with hip extension and flexion
Role depends of thigh position
Term
Gluteus Maximus
Definition
Interior gluteal nerve L5-S2

Hip extension
Hip ER
Lower fibers assist hip ADD
Upper fibers assist hip ABD
Thru IT band stabilizes knee
Term
Gluteus Medius
Definition
Superior gluteal nerve L4-S1

Hip ABD
Hip ER (posterior fibers)
Hip IR (anterior fibers)
Anterior fibers may assist flexion
Posterior fibers may assist extension
Term
Gluteus Mimimus
Definition
Superior gluteal nerve L4-S1

Hip ABD
Hip IR
Term
Tensor fasciae latae
Definition
Superior gluteal nerve L4-S1

Hip flexion
Hip IR
Hip ABD
Term
Piriformis
Definition
Nerve to piriformis/Spinal nerves S1-S2

Hip ER
Assist hip ABD when hip is flexed
Hip IR past 90
Term
Obturator Internus
Definition
Nerve to obturator internus off the lumbosacral plexus L5-S1

Hip ER
Assist hip ABD when hip is flexed
Term
Obturator Externus
Definition
Obturator nerve L3-L4

Hip ER
Assist hip ADD
Term
Gemellus Superior
Definition
Nerve to obturator internus off the lumbosacral plexus L5-S1
Term
Gemellus Interior
Definition
Nerve to quadratus femoris off the lumbosacral plexus L5-S1

Hip ER
Assist hip ABD when hip is flexed
Term
Quadratus Femoris
Definition
Nerve to quadratus femoris off the lumbosacral plexus L5-S1

Hip ER
Term
Biceps Femoris
Definition
Long head: Sciatic nerve tibial division L5-S2

Short head: Sciatic nerve (peroneal division L5-S2

Knee Flexion
Knee ER
Hip extension (long head only)
Assist Hip ER (long head only)
Term
Semitendinosus
Definition
Sciatic nerve (tibial division) L5-S2

Knee flexion
Knee IR
Hip extension
Assist Hip IR
Term
Semimembranosus
Definition
Sciatic nerve (tibial division) L5-S2

Knee flexion
Knee IR
Hip extension
Assist Hip IR
Term
Sartorius
Definition
Femoral nerve L2-L3

Hip ER
Hip ABD
Hip flexion
Knee flexion
Knee IR
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