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Anterior Branch of Obturator Nerve
Nervous System

Anterior Branch of Obturator Nerve

Ramus anterior nervi obturatorii

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Quick Facts

Origin: Obturator nerve.

Course: Descends on the anterior surface of adductor brevis, posterior to pectineus and adductor longus muscles.

Branches: Cutaneous and muscular branches.

Supply: Motor innervation to adductor longus, gracilis, adductor brevis, and pectineus muscles; Sensory innervation to skin on the medial side of thigh and hip joint.

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Origin

The anterior branch originates inside the obturator canal as one of two main divisions of the obturator nerve. The other branch is the posterior branch of the obturator nerve.

Course

The obturator nerve travels across the lateral wall of the pelvic cavity to reach the obturator canal. Here it divides into anterior and posterior branches. Through the obturator canal, the anterior branch of the obturator nerve gains access to the medial compartment of the thigh. It then descends on the anterior surface of adductor brevis, posterior to pectineus and adductor longus muscles.

Branches

The anterior branch gives off muscular branches to the adductor longus (L2-L4), gracilis (L2-L3), adductor brevis (L2-L3), and pectineus (L2-L3) muscles. Cutaneous branches provide sensory innervation to skin on the medial side of the thigh. In addition, articular branches are also given off to the hip joint.

Supplied Structures

The anterior branch of the obturator nerve provides motor innervation to adductor longus (L2-L4), gracilis (L2-L3), adductor brevis (L2-L3), and pectineus (L2-L3) muscles. It also supplies sensory innervation to the skin on the medial side of the thigh and to the hip joint.

Learn more about this topic from other Elsevier products

Obturator Nerve

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Destruction of the obturator nerve also is useful in the palliation of hip adductor spasm after spinal cord injury or stroke that limits the ability to provide perineal care or perform urinary catheterization, and inhibits sexual intercourse.

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