(a) Describe the formation and composition of a spinal nerve. (b) Name the branches of a spinal nerve (other than the rami communicantes), and indicate their distribution. (a) Define plexus. (b)...

(a) Describe the formation and composition of a spinal nerve.

(b) Name the branches of a spinal nerve (other than the rami communicantes), and indicate their distribution.

(a) Define plexus.

(b) Indicate the spinal roots of origin of the four major nerve plexuses, and name the general body regions served by each.