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Flashcards in General Deck (14)
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1

What is the CNS?

brain and spinal cord

2

What is the PNS?

spinal nerve that branch of spinal cord that innervate the entire body

3

What does the spinal cord do?

passes info between brain and PNS
acts as major reflex center for body below the head

4

What is the spinal cord continuous with superiorly?

the brainstem through the Foramen magnum of the skull

5

What are the regions that the spinal cord is divided?

5 regions
Cervical
thoracic
lumbar
sacral
coccygeal

6

What are the spinal cord roots?

8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal

7

What carries info from the periphery toward the CNS to ascend the spinal cord to the brain?

Afferent neurons

8

What are the type of Afferent neurons?

first order afferent
second order afferent

9

What are first order afferent neurons?

peripheral sensory neurons whose body cell body lie in the dorsal root ganglia

10

What are second order afferent nerves?

cell bodies located in the gray matter within CNS

11

What are efferent Neurons?

carry info from brain to the periphery

12

What are the type of Efferent neurons?

lower motor neurons
upper motor neurons

13

What are lower motor efferent neurons?

cell bodied located in the ventral horn of gray matter and their axons terminate on effector organs of the periphery

14

What are upper motor efferent neurons?

efferent neurons tat descend the spinal cord to synapse on lower motor neurons