Starting at the spinal cord, the subdivisions of the brachial plexus are (in order):
A) roots, trunks, divisions, and cords
B) roots, divisions, cords, and trunks
C) divisions, roots, trunks, and cords
D) trunks, divisions, cords, and roots

Question

Quizplus · Accepted Answer

The subdivisions of the brachial plexus start with the roots (ventral rami of spinal nerves C5-T1), which then come together to form trunks, these trunks then divide into divisions, and finally, the divisions give rise to cords. Therefore, the correct order is roots, trunks, divisions, and cords. Choice A correctly lists these subdivisions in order.

Starting at the Spinal Cord, the Subdivisions of the Brachial