nervous system

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Description and Tags

Nursing

11th

33 Terms

1

function

communication/control

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2

CNS

brain/spinal cord

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3

PNS

cranial nerves/ spinal nerves

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4

ANS

Automatic nervous system

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5

cells (2 types)

neuron (carries transmission), neuroglia (glue)

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6

Myelin Sheath

allows electrical impulses to transmit quickly and efficiently along the nerve cells

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7

neurilemma

protects neuron and regenerates nerves

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8

3 neuron types

sensory, motor, interneurons

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9

receptors

exteroceptors, interoceptors, propriocepters

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10

Interorecptors

located in CNS, function: interpreters

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11

Motor neurons

efferent- function: somatic, visceral

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12

neuroglia

nerve glue

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13

nerve impulse

neurons are not connected

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14

synapse

neurotransmitter

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15

Brain

Encephalon

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16

4 major parts

cerebrum- aware, diencephalon- danger alert, brain stem, cerebellum

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17

cerebrum

largest part, fills upper skull, divided into 2 hemisphere by longitudinal fissure

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18

corpus callosum

contralateral control

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19

cerebral cortex

contains: GYRI- folds, sulci-grooves, divided into 4 lobes- FTOP

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20

diencephalon

thalamus

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21

hypothalamus (mid brain)

“master” of master gland

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22

3 sections

midbrain, pon, madulla oblongata

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23

brain stem

vital for life or (foramen magnum- location)

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24

cerebellum

coordination/balance

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25

ventricles/cerebral spinal fluid

ventricles has 4 rooms

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26

meninges: 3 layers

dura (hard), arachnoid (web), pia (small)

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27

circle of willis

blood supply to the brain, carotid arteries/vertebral arteries, combine to form

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28

spinal cord

2 main functions- conducts impulses to and from brain, reflex center

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29

central canal

contains CSF

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30

Autonomic nervous system:

involuntary system, 2 divisions- sympathetic (fight or flight), parasympathetic (relax)

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31

GYRI

folds

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32

Sulci

grooves

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33

divided into 2 hemisphere separated by longitudinal fissure

cerebrum

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