The third division of trigeminal nerve to text taste from the back of the tongue and detect changes in blood pressure
true or false
The correct answer and explanation is:
The statement is false.
The third division of the trigeminal nerve, also known as the mandibular nerve (V3), is primarily responsible for sensory functions, including the sensation of touch, pain, and temperature from the lower jaw, teeth, and parts of the tongue, as well as motor functions controlling the muscles of mastication (chewing). However, it does not have a role in taste perception or blood pressure regulation.
The taste sensation from the back of the tongue is actually mediated by the glossopharyngeal nerve (cranial nerve IX), specifically its lingual branch. This nerve is responsible for transmitting taste sensations from the posterior third of the tongue. In addition to taste, the glossopharyngeal nerve plays a significant role in the regulation of blood pressure. It monitors the pressure through its carotid sinus branch, which detects changes in blood pressure via baroreceptors and sends information to the brainstem to help regulate cardiovascular functions.
The trigeminal nerve (CN V) is divided into three branches: the ophthalmic nerve (V1), the maxillary nerve (V2), and the mandibular nerve (V3). While V1 and V2 are involved in sensory functions related to the forehead, eyes, nose, and upper jaw, V3 provides sensory input to the lower jaw and motor control for chewing.
In summary, the mandibular division (V3) of the trigeminal nerve does not transmit taste from the back of the tongue, nor is it involved in blood pressure detection. These functions are managed by other cranial nerves, specifically the glossopharyngeal nerve.