Question

Vagus nerve is a

• A. V${}^{th}$ cranial nerve
• B. VI${}^{th}$ cranial never
• C. IX${}^{th}$ cranial nerve
• D. X${}^{th}$ cranial nerve

Answer 1

The correct option is D X${}^{th}$ cranial nerve

The vagus nerve has the highest number of branches. It is the longest of all cranial nerves. It is also called X cranial nerve or 10${}^{th}$ cranial nerve. It extends from the brain stem to the abdomen via various organs including the heart, oesophagus and lungs. The vagus forms part of the involuntary nervous system and controls unconscious body procedures, such as keeping the heart rate constant and controlling food digestion. It contains motor and sensory fibers. Thus, the correct answer is option D.