NEET PG DENTAL EXAM

BRAIN

CRANIAL NERVES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which nerve is motor & sensory and responsible for heart rate & respiration rate and organ sensation & taste?

A	vagus (X)
B	optic (II)
C	facial (VII)
D	hypoglossal (XII)

Explanation:

Detailed explanation-1: -The vagus nerve is responsible for the regulation of internal organ functions, such as digestion, heart rate, and respiratory rate, as well as vasomotor activity, and certain reflex actions, such as coughing, sneezing, swallowing, and vomiting (17).

Detailed explanation-2: -In the thorax and abdomen, the vagus nerve is the main parasympathetic outflow to the heart and gastro-intestinal organs. The Heart: Cardiac branches arise in the thorax, conveying parasympathetic innervation to the sino-atrial and atrio-ventricular nodes of the heart.

Detailed explanation-3: -The vagus nerve plays an important role in maintaining physiological homeostasis, which includes reflex pathways that regulate cardiac function. The link between vagus nerve activity and the high-frequency component of heart rate variability (HRV) has been well established, correlating with vagal tone.

There is 1 question to complete.