MEDICAL
NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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central nervous system
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peripheral nervous system
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spinal cord
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cauda equina
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Detailed explanation-1: -Peripheral nervous system is divided into somatic and autonomic nervous systems. Somatic nervous system consists of cranial nerves and spinal nerves. There are 12 pairs of cranial nerves in the brain connecting head and upper body, while 31 pairs of spinal nerves connecting the rest of the body.
Detailed explanation-2: -There are 31 pairs of spinal nerves which arise from 31 segments of spinal cord and leave the cord in invertebratal spaces. Each spinal nerve is a combination of nerves from the dorsal root and the ventral root. Cranial nerves originate in the brain or brain stem and have 12 pairs.
Detailed explanation-3: -In total, there are 31 pairs of spinal nerves grouped regionally by spinal region. More specifically, there are eight cervical nerve pairs (C1-C8), twelve thoracic nerve pairs (T1-T12), five lumbar nerve pairs (L1-L5), 5 sacral (S1-S5), and a single coccygeal nerve pair.
Detailed explanation-4: -There are 12 pairs of cranial nerves and 31 pairs of spinal nerves which constitute the peripheral nervous system or PNS.