The wrist joint is innervated by branches of the median, radial, and ulnar nerves. These nerves provide both sensory and motor functions to the wrist and hand.
Nerves of the Wrist Joint
Here's a breakdown of the nerves that innervate the wrist joint:
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Median Nerve: The median nerve contributes to wrist innervation via its anterior interosseous branch.
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Radial Nerve: The radial nerve innervates the wrist joint through the posterior interosseous branch.
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Ulnar Nerve: The ulnar nerve directly innervates the wrist via its deep motor branches.
Summary Table of Wrist Joint Innervation
| Nerve | Branch | Function |
|---|---|---|
| Median Nerve | Anterior Interosseous Branch | Primarily motor, supplying muscles in the forearm. Contributes to proprioception in the wrist. |
| Radial Nerve | Posterior Interosseous Branch | Primarily motor, supplying muscles in the forearm. Contributes to sensory feedback from the wrist joint. |
| Ulnar Nerve | Deep Motor Branches | Primarily motor, controlling intrinsic hand muscles. Provides sensory information from the wrist. |
Clinical Significance
Understanding the innervation of the wrist joint is crucial in diagnosing and treating conditions such as:
- Carpal Tunnel Syndrome: Compression of the median nerve at the wrist.
- Wrist Fractures: Nerve damage can occur following a fracture.
- Arthritis: Nerve irritation due to joint inflammation.
