Extensor retinaculum of wrist

Looks like

A strong band across the back of the wrist, dividing the tendons into six tunnels.

What it does

Holds the finger and wrist straightening tendons in place.

Keeping it well

Tendon rubbing under it can cause pain and swelling; rest usually helps.

Related conditions

• Carpal tunnel syndrome
• De Quervain's tenosynovitis
• Dupuytren's contracture & trigger finger
• Ganglion cyst
• Juvenile idiopathic arthritis
• Pseudogout (calcium pyrophosphate disease)
• Raynaud's phenomenon
• Repetitive strain & overuse injury
• Rheumatoid arthritis