Which nerve roots contribute to the radial nerve?

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Study for the Muscle Actions and Functions – Anatomy and Movement Test. Equip yourself with multiple choice questions, each with detailed explanations and hints. Prepare confidently for your exam!

Multiple Choice

Which nerve roots contribute to the radial nerve?

Explanation:
The radial nerve carries fibers from all five ventral rami that contribute to the brachial plexus: C5, C6, C7, C8, and T1. These roots come together to form the posterior cord, from which the radial nerve arises. That full range—C5 through T1—is why this option is correct. The other ranges miss one or more of the contributing roots or include a root (like C4) that doesn’t normally contribute to the radial nerve.

The radial nerve carries fibers from all five ventral rami that contribute to the brachial plexus: C5, C6, C7, C8, and T1. These roots come together to form the posterior cord, from which the radial nerve arises. That full range—C5 through T1—is why this option is correct. The other ranges miss one or more of the contributing roots or include a root (like C4) that doesn’t normally contribute to the radial nerve.

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