BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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concerned with vision
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governs sense of smell
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controls tongue movements, swallowing and gag reflex
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controls tongue movements
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Detailed explanation-1: -The Hypoglossal Nerve is the 12th Cranial Nerve (Cranial Nerve XII). It is mainly an efferent nerve for the tongue musculature. The nerve originates from the medulla and travels caudally and dorsally to the tongue.
Detailed explanation-2: -The hypoglossal nerve leaves the brainstem through the anterolateral sulcus of the medulla oblongata. Its dozen roots pass across the posterior cranial fossa laterally before merging into the unique trunk of the nerve in the hypoglossal canal.
Detailed explanation-3: -Disorders of the 12th cranial nerve (hypoglossal nerve) cause weakness or wasting (atrophy) of the tongue on the affected side. This nerve moves the tongue. Hypoglossal nerve disorders may be caused by tumors, strokes, infections, injuries, or amyotrophic lateral sclerosis.
Detailed explanation-4: -The hypoglossal nerve is of a general somatic efferent (GSE) type. These muscles are involved in moving and manipulating the tongue. The left and right genioglossus muscles in particular are responsible for protruding the tongue.