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Flashcards in nervous system Deck (12)
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1

what are the functions of the nervous system?

communication, regulating internal events, organising behaious(external), info storage, sensations, perceptions, emotions

2

what are glia?

more numerous than neurons, supportive and nutritive

3

what cells are involved in myelin formation in CNS & PNS?

PNS-schwann cells
CNS - oligodendrocytes

4

what constitutes PNS?

spinal and cranial nerves

5

what constitutes the CNS?

spinal cord and brain

6

what well defined part of the body do sensory axons(nerves) supply?

dermatomes- on body surface

7

what well defined part of the body do motor axons supply

myotomes-blocks of muscle

8

what are nerve plexuses?

peripheral nerves supply particular regions of the body, axons in spinal nerves form various peripheral nerves

9

what cranial nerve is distributed to the trunk?

vagus

10

what is the function on peripheral nerves?

carry info to and from CNS

11

what do afferent (sensory) nerves do?

carry info to CNS, associated with sensations/perceptions except from viscera

12

what do efferent (motor) nerves do?

carry info away from CNS, cause actions eg muscle contraction. somatic = voluntary muscle. visceral = ANS - SM and some glands