Inferior Gluteal Nerve Injury (L5-S2)
Overview
Plain-Language Overview
An Inferior Gluteal Nerve Injury (L5-S2) affects the nerve that controls the gluteus maximus muscle, which is important for movements like standing up, climbing stairs, and walking. This nerve injury impacts the muscular system and can cause weakness or difficulty in extending the hip. People with this condition may notice trouble with activities that require pushing the leg backward or rising from a seated position. The injury can result from trauma, surgery, or compression near the pelvis. It mainly affects the ability to perform hip extension and maintain postural stability during movement.
Clinical Definition
Inferior Gluteal Nerve Injury (L5-S2) is a neuropathy involving damage to the inferior gluteal nerve, which innervates the gluteus maximus muscle, the primary hip extensor. The injury commonly results from pelvic trauma, posterior hip dislocation, or iatrogenic causes such as surgical procedures in the gluteal region. This nerve injury leads to weakness in hip extension, impaired ability to climb stairs or rise from a chair, and a characteristic gait disturbance known as the gluteus maximus lurch. The condition is significant because it compromises postural control and functional mobility. Electrophysiological studies and clinical examination are essential for diagnosis. The injury may be isolated or part of a broader lumbosacral plexopathy.