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   » » Wiki: Obturator Nerve
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The obturator nerve in arises from the divisions of the second, third, and fourth in the ; the branch from the third is the largest, while that from the second is often very small.


Structure
The obturator nerve originates from the anterior divisions of the , , and spinal nerve roots. It descends through the fibers of the , and emerges from its medial border near the brim of the pelvis. It then passes behind the common iliac arteries, and on the lateral side of the internal iliac artery and vein, and runs along the lateral wall of the , above and in front of the obturator vessels, to the upper part of the obturator foramen.

Here it enters the thigh, through the , and divides into an anterior and a posterior branch, which are separated at first by some of the fibers of the obturator externus, and lower down by the .

An accessory obturator nerve may be present in approximately 8% to 29% of the general population.


Branches
  • Anterior branch of obturator nerve
  • Posterior branch of obturator nerve
  • Cutaneous branch of the obturator nerve


Function
The obturator nerve is responsible for the sensory innervation of the skin of the medial aspect of the .

The nerve is also responsible for the motor innervation of the adductor muscles of the (external obturator,Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 336. , , , ) and the (inconstant). It is, notably, not responsible for the innervation of the obturator internus, despite the similarity in name.Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 345.


Clinical significance
An obturator may be used during and surgery in combination with other .

==Additional images==


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