Question
Download Solution PDFHow many pairs of nerves arise from the spinal cord?
This question was previously asked in
45th BPSC Prelims (Held in 2002) Official paper
Answer (Detailed Solution Below)
Option 2 : 31
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Ancient History: Prehistoric Period
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Detailed Solution
Download Solution PDFThe correct answer is 31
Key Points
- The nerves arising directly from the spinal cord are called the spinal nerves. T
- There are 31 pairs of spinal nerves in humans: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.
- They are a part of the peripheral nervous system.
- Each pair connects the spinal cord with a specific region of the body.
- Near the spinal cord each spinal nerve branches into two roots.
- One, composed of sensory fibres, enters the spinal cord via the dorsal root; its cell bodies lie in a spinal ganglion that is outside the spinal cord.
- The other, composed of motor fibres, leaves the spinal cord via the ventral root; its cell bodies lie in specific areas of the spinal cord itself.
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