Preganglionic fibers serving head, neck and thorax emerge from spinal cord segments (blank-blank) ascend the sympathetic chain? fill in the blank?

Preganglionic fibers serving head, neck and thorax emerge from spinal cord segments (blank-blank) ascend the sympathetic chain? fill in the blank?

Preganglionic fibers serving head, neck and thorax emerge from spinal cord segments (blank-blank) ascend the sympathetic chain? fill in the blank?





A. C2-C8
B. T1-T6
C. C4-T2
D. C7-T6







Answer: B