The hip is innervated primarily from the L3 spinal level; hip joint irritation is usually felt along the L3 dermatome reference from the groin, down the front of the thigh to the knee.
Major Nerves Subject to Injury or Entrapment
Sciatic nerve. Entrapment may occur when the sciatic nerve passes deep to the piriformis muscle (occasionally it passes over or through the piriformis).
Obturator nerve. Isolated injury is rare, although uterine pressure and damage during labor may occur.
Femoral nerve. Injury may result from fractures of the upper femur or pelvis, during reduction of congenital dislocation of the hip, or from pressure during a forceps labor and delivery.
Common Sources of Referred Pain in the Hip and Buttock Region
If painful symptoms are referred to the hip and buttock region from other sources, primary treatment must be directed to the source of the irritation. Common sources of referred pain into the hip and buttock region include:
• Nerve roots or tissues derived from spinal segments L1, L2, L3, S1, and S2
• Lumbar intervertebral and sacroiliac joints
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