Question

The vagus nerve is the cranial nerve numbering

(a) 7

(b) 5

(c) 10

(d) 9.

Answer 1

Ans. (C) 10

Of the twelve pairs of cranial nerves, two pairs arise from neuron cell bodies located in the forebrain and ten pairs arise from the midbrain and hindbrain. The cranial nerves are designated by Roman numerals and by names. Most cranial nerves are classified as mixed nerves ( Both sensory and motor fibers). The vagus nerve is the cranial nerve of mixed type of nature.

The vagus nerve is the cranial nerve numbering ten, is the longest and origin at the lateral side of the medulla oblongata.

The function of vagus nerve: Vocal cord (sound production), lungs, respiratory reflexes, peristaltic movement, speech, swallowing, secretion of gastric glands, inhibition of heartbeat.