BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Facial (VII)
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Hypoglossal (XII)
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Accessory (XI)
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Vagus (X)
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Detailed explanation-1: -Genioglossus-Draw the tongue forward from the root. Hyoglossus-Retracts the tongue and depresses its side. Styloglossus-Draws the tongue upward. Intrinsic muscles (superior/inferior longitudinales, transversus, verticalis)-Changes the shape of the tongue such as shortening, narrowing, curving the tongue. [1]
Detailed explanation-2: -Each fold contains the aryepiglottic muscle, which plays an important role in the movements of the epiglottis. The upper end of the epiglottis is free and it projects posterosuperiorly from the stalk, passing anterior to the laryngeal inlet and behind the body of hyoid bone and the base of the tongue.
Detailed explanation-3: -The hypoglossal nerve (CN XII) provides motor innervation to all of the intrinsic and extrinsic muscles of the tongue except for the palatoglossus muscle, which is innervated by the vagus nerve (CN X).