Investing fascia of left wrist

Looks like

The tough connective tissue sleeve wrapping the wrist, thickened into bands that hold tendons down.

What it does

Keeps the tendons close to the bone so they pull efficiently.

Keeping it well

Tendons under it can become inflamed with overuse; rest and splinting usually help.

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