Neural Control and Coordination Question 39
39. Which of the following cranial nerves can regulate heart beat?
(a) $X$
(b) IX
(c) VIII
(d) VII
Show Answer
Answer : a
Hints & Solutions
(a) Xth pair of cranial nerves (vagus nerves) has a motor branch called cardiac nerve which innervate cardiac muscles. Motor paralysis due to dysfunction of the tenth cranial nerve has the following clinical features: loss of reflex contraction of the palate seen in the gag reflex. Hoarseness of voice - this may occur in a unilateral recurrent laryngeal nerve lesion. A bovine cough may occur with a bilateral recurrent nerve lesion.
