PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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spinal nerves
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cranial nerves
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peripheral nerves
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central nerves
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Detailed explanation-1: -Cranial nerves are the nerves that emerge directly from the brain (including the brainstem), in contrast to spinal nerves (which emerge from segments of the spinal cord). Cranial nerves relay information between the brain and parts of the body, primarily to and from regions of the head and neck.
Detailed explanation-2: -On the basis of origin of nerves are of two types i.e., cranial nerves and spinal nerves. The cranial nerves arise from the brain and are 12 pairs in number whereas the spinal nerves arise from the spinal cord and are 31 pairs in numbers.
Detailed explanation-3: -Cranial nerves I (olfactory), II (optic), and VIII (vestibulocochlear) are considered purely afferent. Cranial nerves III (oculomotor), IV (trochlear), VI (abducens), XI (spinal accessory), and XII (hypoglossal) are purely efferent.