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| | Peripheral nervous system - Wikipedia, the free encyclopedia |
 | | The 12 cranial nerves originate from the brainstem, and mainly control the functions of the anatomic structures of the head with some exceptions. |
 | | The radial nerve, which innervates the triceps brachii muscle, the brachioradialis muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis muscle), and the extensor and abductor muscles of the thumb. |
 | | The medial brachial cutaneous nerve, T1 The medial antebrachial cutaneous nerve, C8 and T1 The median nerve, partly. |
| en.wikipedia.org /wiki/Peripheral_nervous_system (999 words) |
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