ANATOMY
PELVIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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L5-S2
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For 4-hour
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For 4-s
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S2-S4
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Detailed explanation-1: -The nerve to obturator internus arises from the anterior divisions of the sacral plexus. It is formed from the L5-S2 nerve roots and exits the pelvis via the greater sciatic foramen inferior to the piriformis muscle and typically between the posterior cutaneous nerve of the thigh and the pudendal nerve.
Detailed explanation-2: -The obturator nerve divides into anterior and posterior divisions of the obturator nerve. These divisions both provide skeletal musculature innervation, and the anterior division terminates as the cutaneous branch of the obturator nerve.
Detailed explanation-3: -The anterior roots of spinal nerves L2, L3 and L4 unite near the iliac crest, forming the obturator nerve.
Detailed explanation-4: -The obturator nerve arises from L2, L3, and L4 spinal nerves. It provides the primary motor supply to the medial (adductor) muscle compartment of the thigh. These muscles include external obturator, adductor longus, adductor brevis, adductor magnus, gracilis, and pectineus.