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Mystery roots

Harold Lesser1/22/23 3:54 PM (CST)
Hey colleagues,

Most texts show that the median nerve is supplied by the C5-T1 roots, ulnar C8-T1, and radial C5-T1.

What does the C5 root supply to the median nerve (in a non-prefixed plexus)?

The ulnar head of the Flex Dig Prof is said to be C7-8, where does the C7 root supply come from?

What is the T1 supply to the radial nerve (in a standard plexus)?

It's been a puzzle and I've not come across a definitive answer.


Harold Lesser
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