The lateral cord of the brachial plexus receives contributions from which spinal roots?

• A C8, T1
• B C5, C6
• C C5, C6, C7, C8
• D C5, C6, C7 ✓

Explanation

The lateral cord is formed by the anterior divisions of the upper trunk (C5, C6) and middle trunk (C7). It gives rise to the lateral pectoral nerve, musculocutaneous nerve, and the lateral root of the median nerve. The medial cord (C8, T1) gives the ulnar nerve, medial cutaneous nerves of the arm and forearm, and medial root of the median nerve. The posterior cord (C5–C8, T1 — all posterior divisions) gives the axillary and radial nerves.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

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Written and medically reviewed by the StethoPrep medical team.