Peripheral and Autonomic Nervous System Flashcards

1
Q

What is the PNS functionally divided into?

A

sensory and motor divisions

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2
Q

How many pairs of spinal nerves are there?

A

31

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3
Q

Where do the spinal nerve fibers exit?

A

through the foramen

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4
Q

How many pairs of cervical nerves are there?

A

8 C1-C8

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5
Q

How many pairs of thoracic nerves are there?

A

12

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6
Q

How many pairs of lumbar nerves are there?

A

5

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7
Q

How many pairs of sacral nerves are there?

A

5

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8
Q

how many pairs of coccygeal nerves are there?

A

only 1

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9
Q

What ways to nerve fibers travel through spinal cords?

A

in through the dorsal and out through the ventral

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10
Q

What does the dorsal root contain?

A

sensory fibers with cell bodies located in hte dorsal root ganglia

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11
Q

What does the ventral root contain?

A

motor fibers arising from the anterior gray column

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12
Q

What are the dorsal and ventral rami?

A

where the roots combine into one, forming a spinal nerve

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13
Q

What happens to the spinal nerve as it exits the foramen?

A

it divides into dorsal and ventral rami

-each rami now contains sensory and motor fibers, arranged in a segmental pattern

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