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Quadratus Femoris

Region

Origin & Insertion

['Origin: Ischial tuberosity', 'Insertion: Intertrochanteric crest of femur']

Synergistic Muscles

['Gemelli', 'Obturator externus']

Joints

['Hip']

Primary Actions

['Hip external rotation']

Nerve & Spinal Segment

Nerve to quadratus femoris

Sacral plexus; L4–S1

Interesting

Most inferior of deep lateral rotators. [Clinically Oriented Anatomy]

Reversal of Action

Stabilize pelvis as hip rotates out

Common Dysfunctions

Deep hip pain, impingement symptoms

How to Stretch

Hip IR with adduction and flexion.

Trigger Points

How to Strengthen

Seated banded ER.

Concentric Action

Hip external rotation

Applications:

Supports femoral head positioning and hip joint congruency

Eccentric Action

Resist hip internal rotation

Isotonic Action

Seated ER with band resistance

Related Conditions

['Ischiofemoral impingement', 'Piriformis mimic']

Isometric Action

Hold ER in standing

Exercise Ideas

['Bridge with band ER', 'Seated clamshell', 'Lateral hip rotation']

Related Blogs

Images

Videos

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