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The accessory obturator nerve (AON) is a relatively uncommon anatomical variation of the lumbar plexus, typically arising from the L3 and L4 spinal nerves. Though it is present in a minority of the population, the AON plays a significant role in the motor and sensory innervation of the hip joint and surrounding structures. This article aims to explore the anatomy, prevalence, and variations of the AON, as well as its clinical significance in hip joint function. The role of the AON in the hip joint’s stability, particularly its involvement in adduction and flexion movements, will be examined. Additionally, the implications of AON variations for surgical procedures, nerve injuries, and diagnostic assessments related to hip function are discussed.
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