GENERAL HISTOLOGY

NERVOUS SYSTEM SPECIAL SENSE

SPINALCORD

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many plexus groups branch off the spinal cord?
A
3
B
4
C
5
D
None of the above
Explanation: 

Detailed explanation-1: -There are two major groups of nerve plexus es: the spinal plexus and the autonomic plexus. There are five distinct plexuses in each.

Detailed explanation-2: -In total, there are 31 pairs of spinal nerves grouped regionally by spinal region. More specifically, there are eight cervical nerve pairs (C1-C8), twelve thoracic nerve pairs (T1-T12), five lumbar nerve pairs (L1-L5), 5 sacral (S1-S5), and a single coccygeal nerve pair.

Detailed explanation-3: -Nerve Junction Boxes: The Plexuses Four nerve plexuses are located in the trunk of the body: The cervical plexus provides nerve connections to the head, neck, and shoulder. The brachial plexus provides connections to the chest, shoulders, upper arms, forearms, and hands.

Detailed explanation-4: -The brachial plexus is divided, proximally to distally into rami/roots, trunks, divisions, cords, and terminal branches.

Detailed explanation-5: -Cervical plexus-serves the head, neck and shoulders. Brachial plexus-serves the chest, shoulders, arms and hands. Lumbosacral plexus. Lumbar plexus-serves the back, abdomen, groin, thighs, knees, and calves. Coccygeal plexus-serves a small region over the coccyx.

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