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Obturator Externus

Region

Origin & Insertion

['Origin: Internal surface of obturator membrane and surrounding bones', 'Insertion: Medial surface of greater trochanter']

Synergistic Muscles

['Gemellus muscles', 'Quadratus femoris']

Joints

['Hip']

Primary Actions

['External rotation of hip']

Nerve & Spinal Segment

Obturator nerve

Lumbar plexus; L3–L4

Interesting

Forms part of the lateral wall of the pelvis. [Gray’s]

Reversal of Action

Brace pelvis while hip rotates out

Common Dysfunctions

Hip instability, groin pain

How to Stretch

Deep external rotator stretch (seated IR).

Trigger Points

How to Strengthen

Resisted hip ER.

Concentric Action

Externally rotate thigh

Applications:

Targeted for balance and lateral hip stability in aging adults

Eccentric Action

Control return from external rotation

Isotonic Action

Seated ER with foot drop-in control

Related Conditions

['Deep gluteal syndrome', 'Piriformis mimic']

Isometric Action

Hold neutral hip rotation under tension

Exercise Ideas

['Band ER press', 'Rotational clams', 'Pelvic bridge with rotation']

Related Blogs

Images

Videos

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