What is the nerve root of the obturator nerve?

The obturator nerve arises from the lumbar plexus and is primarily formed by the nerve roots from the second, third, and fourth lumbar vertebrae, specifically L2, L3, and L4. This anatomical sourcing is crucial as it determines the nerve's function and the muscle innervations it provides, which include the adductor muscles of the thigh. The nerve's pathway also facilitates sensory innervation to parts of the skin over the medial thigh.

Understanding the specific nerve roots helps in clinical assessments and interventions related to lower limb function and sensation. In injuries or conditions affecting the pelvis or lumbar region, knowing that the obturator nerve is predominantly derivative of L2 to L4 assists healthcare providers in predicting potential neuromuscular deficits that a patient may exhibit.