Mucous sheaths on back of wrist

Mucous Sheaths on the Back of the Wrist

Illustration of the mucous sheaths on the back of the wrist

The mucous sheaths on the back of the wrist are a part of the human anatomy that play a crucial role in the functioning of the hand. These sheaths, also known as synovial sheaths, are tubular structures that enclose certain tendons in the wrist and hand, providing them with a smooth surface that reduces friction during movement.

Structure

The mucous sheaths on the back of the wrist are composed of two layers: an outer fibrous layer and an inner synovial layer. The outer layer is tough and resilient, providing protection to the tendons within. The inner layer, on the other hand, is smooth and secretes a lubricating fluid known as synovial fluid, which allows the tendons to move freely without friction.

Function

The primary function of the mucous sheaths on the back of the wrist is to facilitate the smooth movement of the tendons. By providing a frictionless environment, these sheaths allow the tendons to glide easily, enabling efficient and pain-free movement of the hand and fingers.

Clinical Significance

In certain medical conditions, such as tenosynovitis, the mucous sheaths on the back of the wrist can become inflamed, leading to pain and restricted movement. This condition is often caused by overuse or injury, and is commonly seen in individuals who engage in repetitive hand or wrist movements.

See Also

• Tendon sheath
• Synovial joint
• Tenosynovitis