The subclavian nerve, also known as the nerve to the subclavius, is a crucial component of the brachial plexus that innervates the subclavius muscle.
Anatomy of the Subclavian Nerve
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Origin: The subclavian nerve branches from the upper trunk of the brachial plexus.
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Root Contribution: It contains axons from the C5 and C6 nerve roots. This means the signals that travel along this nerve originate from the fifth and sixth cervical spinal nerves.
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Target Muscle: The nerve's primary function is to provide motor innervation to the subclavius muscle.
Function of the Subclavius Muscle
The subclavius muscle, innervated by the subclavian nerve, plays a role in:
- Stabilizing the clavicle: It helps anchor and protect the clavicle, especially during arm movements.
- Depressing the shoulder: It assists in pulling the shoulder downwards.
Summary
| Feature | Description |
|---|---|
| Name | Subclavian Nerve (Nerve to Subclavius) |
| Origin | Upper Trunk of Brachial Plexus |
| Nerve Roots | C5, C6 |
| Target Muscle | Subclavius |
| Primary Function | Innervates and controls the subclavius muscle |
