Cutaneous branch of the obturator nerve

Cutaneous branch of the obturator nerve

The cutaneous branch of the obturator nerve is a peripheral nerve that provides sensory innervation to the skin of the medial aspect of the thigh. It is a branch of the obturator nerve, which is one of the major nerves of the lower limb.

Anatomy

The obturator nerve arises from the lumbar plexus, specifically from the ventral rami of the second, third, and fourth lumbar spinal nerves (L2-L4). It descends through the psoas major muscle and enters the pelvis through the obturator canal. Within the pelvis, the obturator nerve divides into an anterior and a posterior branch.

The cutaneous branch of the obturator nerve arises from the anterior division of the obturator nerve. It emerges from the obturator canal and passes through the obturator externus muscle. It then continues its course along the medial aspect of the thigh, providing sensory innervation to the skin in this region.

Function

The main function of the cutaneous branch of the obturator nerve is to provide sensory innervation to the medial aspect of the thigh. This includes the skin over the adductor muscles, the medial aspect of the knee, and the upper part of the medial leg.

The sensory information carried by the cutaneous branch of the obturator nerve includes touch, temperature, and pain. It allows for the perception of sensations in the medial thigh region and contributes to the overall sensory feedback from the lower limb.

Clinical Significance

Injury or compression of the cutaneous branch of the obturator nerve can result in sensory disturbances in the medial thigh region. This can manifest as numbness, tingling, or a loss of sensation in the affected area. The exact symptoms and severity of the sensory disturbances depend on the extent and location of the nerve injury.

Common causes of injury to the cutaneous branch of the obturator nerve include trauma, surgical procedures in the pelvic region, and compression due to anatomical variations or external pressure. In some cases, the symptoms may resolve spontaneously over time, while in others, medical intervention may be required to alleviate the symptoms.

Related Anatomy

The cutaneous branch of the obturator nerve is closely related to other structures in the medial thigh region. It runs parallel to the adductor longus muscle and is located deep to the sartorius muscle. It also lies superficial to the adductor magnus muscle.

The obturator nerve as a whole is closely associated with the obturator vessels, which are responsible for the blood supply to the medial thigh region. Additionally, the obturator nerve is in close proximity to the femoral nerve, which provides sensory and motor innervation to the anterior thigh muscles.

References

1. Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

2. Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

See Also

• Obturator nerve
• Lumbar plexus
• Lower limb anatomy

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  Gray's Anatomy illustration of the cutaneous branch of the obturator nerve