Biology - Neural Control and Coordination Question with Solution | TestHub
A person suffered a head injury in a road accident, which resulted in damage to the hypoglossal nerve. What adverse effect will this have on his bodily functions?
Options:
Answer:
Solution:
The hypoglossal nerve is the twelfth cranial nerve (CN XII).
It is a purely motor nerve that supplies the intrinsic and extrinsic muscles of the tongue (except the palatoglossus muscle).
Damage to the hypoglossal nerve results in the loss of voluntary movements of the tongue, leading to difficulties in speech, chewing, and swallowing.
Impaired hearing and equilibrium are associated with the vestibulocochlear nerve (CN VIII).
Loss of control over eyeball movement is associated with the oculomotor (CN III), trochlear (CN IV), and abducens (CN VI) nerves.
Salivary secretion is controlled by the facial (CN VII) and glossopharyngeal (CN IX) nerves.
Answer: Loss of voluntary movements of the tongue.
