Question

multiple choice question
the ______ branch of a spinal nerve innervates the muscles and skin of the back.

○ anterior
○ lateral
○ posterior
○ visceral

Explanation:

Spinal nerves have branches. The posterior (dorsal) branch of a spinal nerve is responsible for innervating the muscles and skin of the back. The anterior branch innervates the anterior and lateral trunk and limbs, lateral is not the main branch for back innervation, and visceral branches relate to internal organs, not back muscles/skin.

Answer:

C. posterior