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

Question

Quizplus · Accepted Answer

The brachial plexus is divided into five roots, which originate from the spinal cord at C5-T1. These roots then combine to form three trunks (upper, middle, and lower) which give rise to six divisions (anterior and posterior divisions of each trunk). Finally, these divisions combine to form three cords (lateral, medial, and posterior cords) which ultimately innervate the muscles and skin of the upper limb. Therefore, the order is roots, trunks, divisions, and cords.

Starting at the Spinal Cord,the Subdivisions of the Brachial Plexus