Sacral plexus

Looks like

A triangle of nerve roots on the back wall of the pelvis, gathering into the sciatic nerve.

What it does

Supplies the buttock, back of the thigh, and almost everything below the knee.

Keeping it well

Avoid long pressure on the buttock. Pain down the leg with numbness in the groin is an emergency.

Its parts

• Anterior root of posterior femoral cutaneous nerve
• Nerve to piriformis muscle
• Nerve to quadratus femoris muscle
• Posterior femoral cutaneous nerve
• Posterior root of posterior femoral cutaneous nerve
• Superior gluteal nerve

Related conditions

• Amyloidosis (AL and ATTR)
• Bone metastases and spinal cord compression
• Botulism
• Chickenpox (varicella)
• Chronic neuropathic pain
• Chronic pain syndrome
• Fibromyalgia
• Guillain-Barré syndrome
• Lyme disease
• Myasthenia gravis
• Neurogenic bladder
• Peripheral neuropathy
• Rabies
• Restless legs syndrome
• Shingles (herpes zoster)
• Tetanus
• Vitamin B1, C and other deficiencies