Week 1:1 Flashcards

1
Q

Divisions of the CNS

A
  • brain

- spinal cord

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2
Q

brain functions

A
  • receives and processes sensory information
  • initiates responses
  • stores memories
  • generates thoughts and emotions
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3
Q

spinal cord functions

A
  • conducts signals to and from the brain

- controls reflex activities

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4
Q

divisions of the PNS

A
  • motor neurons

- sensory neurons

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5
Q

motor neurons

A

CNS to muscles and glands

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6
Q

sensory neurons

A

sensory organs to CNS

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7
Q

divisions of motor neurons

A
  • somatic nervous system

- autonomic nervous system

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8
Q

somatic nervous system controls

A

voluntary movements

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9
Q

autonomic nervous system controls

A

involuntary responses

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10
Q

divisions of autonomic nervous system

A
  • sympathetic

- parasympathetic

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11
Q

sympathetic

A

fight or flight

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12
Q

parasympathetic

A

rest or digest

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13
Q

Good way to know if something’s part of the PNS

A

if it’s not encased in bone

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14
Q

soma

A

body

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15
Q

afferent

A

sensory, ascending, toward the brain

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16
Q

efferent

A

motor, descending, away from the brain

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17
Q

white matter

A
  • consists of myelinated axons

- conducts information

18
Q

gray matter

A
  • cell bodies

- information integrated

19
Q

dendrites

A

receive messages

20
Q

Where is information carried in a neuron?

A

down the axon via an action potential to the axon terminals

21
Q

Why are cell bodies important?

A

integration of information

22
Q

gray matter in the spinal cord

A

horns

23
Q

white matter in the spinal cord

A

columns

24
Q

sensory aspect of the spinal cord

A
  • enters the dorsal horn via dorsal root ganglia

- processed into motor command if necessary

25
Q

motor aspect of the spinal cord

A

exits ventral horn

26
Q

What are the protective components?

A
  • blood brain barrier
  • CSF
  • spinal column
  • meninges
27
Q

blood brain barrier

A

cells of the nervous system

28
Q

CSF made of

A
  • salts, sugars, water

- keeps osmotic balance

29
Q

Through which system does CSF flow?

A

ventricular system

30
Q

What helps the brain “float”?

A

CSF

31
Q

Why does the brain need to float?

A
  • shock absorption
  • prevents compression
  • gravity would exert major effect without it
32
Q

layers of the meninges

A
  • dura mater
  • arachnoid mater
  • subarachnoid space
  • pia mater
33
Q

mater =

A

mother

34
Q

What does the dura mater contain?

A
  • sinuses that help drain the brain

- has own blood supply

35
Q

What is the arachnoid mater?

A
  • weblike membrane

- helps keep brain suspended along with dura mater

36
Q

What does the pia mater do?

A
  • follows all brain’s contours

- encases the vessels

37
Q

subarachnoid space significance

A

CSF flows through here

38
Q

Which of the meninges is pain sensitive?

A

dura mater only

39
Q

What is present in the spinal meninges but not the cerebrum?

A

epidural space

40
Q

subdural space

A

no subdural space

41
Q

significance of meninges

A
  • inflammation can be deadly

- nervous system complications

42
Q

hematoma

A
  • blood supply to meninges is damaged or disrupted

- can have primary or secondary injuries