BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Cranial nerve 3 is both a somatic and visceral efferent motor nerve. This means it has two nuclei and carries two types of efferent fibers. As the name suggests, the oculomotor nerve is the chief motor nerve supplying the eye.
Detailed explanation-2: -Cranial nerves III, IV, and VI (oculomotor, trochlear, and abducens nerves, respectively) are general somatic efferent (GSE) nerves responsible for innervating the extraocular muscles within the orbit.
Detailed explanation-3: -GSE fibers carry motor signals to skeletal muscles derived from embryonic somites. GVA fibers carry general sensation from the viscera. GVE fibers provide motor (parasympathetic) innervation to the viscera.
Detailed explanation-4: -The functions of the cranial nerves are sensory, motor, or both. Sensory cranial nerves help a person see, smell, and hear. Conversely, motor cranial nerves help control muscle movements in the head and neck. Each nerve has a name that reflects its function and a number according to its location in the brain.