BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Facial
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Oculomotor
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Trochlear
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Trigeminal
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Detailed explanation-1: -Cranial nerves III (CNIII) (oculomotor ), IV (trochlear), and VI (abducens ) control the position of the eyeballs; CNIII influences the position of the eyelids and the size of the pupils.
Detailed explanation-2: -The trochlear nerve pair originates from a pair of symmetrical trochlear nuclei within the medial midbrain at the level of the inferior colliculus. The left and right nerves then travel dorsally surrounded by the periaqueductal gray matter, decussating before their exit in the dorsal midbrain.
Detailed explanation-3: -The trochlear nerve is one of 12 sets of cranial nerves. It enables movement in the eye’s superior oblique muscle. This makes it possible to look down. The nerve also enables you to move your eyes toward your nose or away from it.
Detailed explanation-4: -The trochlear nerve is the fourth cranial nerve (CN IV) and one of the ocular motor nerves that controls eye movement. The trochlear nerve, while the smallest of the cranial nerves, has the longest intracranial course as it is the only nerve to have a dorsal exit from the brainstem.