BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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abducens
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accessory
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glossopharyngeal
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hypoglossal
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Detailed explanation-1: -Trapezius and sternocleidomastoid muscles have branchiomeric origin; the afferents that derive from these muscles reach the nucleus of the solitary tract. The trapezius muscle elevates, lowers, adduces and abducts, and externally rotates the scapula. It extends the head by rotating it to the opposite side.
Detailed explanation-2: -The spinal accessory nerve (cranial nerve XI) innervates the motor function of the trapezius. The function of the trapezius is to stabilize and move the scapula. The upper fibers can elevate and upwardly rotate the scapula and extend the neck. The middle fibers adduct (medially retract) the scapula.
Detailed explanation-3: -The LMNs of the spinal accessory nerve supply the sternocleidomastoid muscle and the upper two thirds of the trapezius muscle.