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Flashcards in basics 1 Deck (50)
1

What makes up the nervous system (7)

brain
12 pairs of cranial nerves + branches
spinal cord
31 pairs of spinal nerves + branches
ganglia
enteric plexus
sensory receptors

2

3 types of neurons based on their function

sensory (afferent)
interneuron
motor (efferent)

3

CNS made up of

brain
spinal cord

4

PNS made up of

cranial nerves
spinal nerves
ganglia
sensory nerves

5

sensory nerves also called

afferent

6

motor nerves also called

efferent

7

PNS is also then subdivided into...

somatic nervous system
autonomic NS
enteric NS

8

The SNS made up of/does what

1) neurons that conduct impulses from somatic and special sensory receptors to the CNS
2) motor neurons from from CNS to skeletal muscle

9

ANS consists of

sensory neurons from visceral organs, motor neurons from CNS to smooth, cardiac muscle & glands

10

ENS consists of

2 plexuses that control GI
(monitors sensory changes and controls operations)

11

resting membrane potential of neutron

- 70mV

12

what forms myelin sheaths

oligodendrocytes

13

what forms blood brain barrier

astrocytes

14

what has phagocytic functions in NS

microglia

15

autonomic NS innervates what

visceral structures (maintains homestasis)

16

grey matter is rich in

cell bodies

17

white matter is in

axons

18

cluster of cell bodies with similar functions are called?

nuclei

19

what word means "crosses over"

decussates

20

which germ layer gives rise to nervous system

ectoderm (also skin)

21

embryology progression to neural tube

ectoderm > neural plate > neural grove with neural fold > neural folds fuse to form neural tube

22

where do you find grey matter

centre of spinal cord and outer regions of brain (cerebral cortex)

23

forebrain called

prosencephalon

24

midbrain called

mesencephalon

25

hindbrain called

rhombencephalon

26

(embryology) the prosencephalon divides into

telencephalon and diencephalon

27

(embryology) rhombencephalon divides into

metencephalon and myelencephalon

28

forebrain also referred to as the

cerebrum

29

3 meningeal layers

dura mater
arachnoid mater
pia mater

30

2 sheets of cranial dura mater

falx cerebri
tentorium cerebelli

* these incompletely divide cranial cavity into compartments

31

what has channels for venous drainage of the brain

dural venous sinuses of the cranial dura mater

32

what is located below arachnid mater

subarachnoid space where CSF circulates

33

what supplies blood to brain

internal carotids and vertebral arteries (anastomose to form circle of willis)

34

what supplies blood to the spinal cord

vessels arising from vertebral arteries and radicular arteries derived from segmental vessels

35

meningeal layers from superficial to deep

dura > arachnoid > pia

36

subarachnoid space located where

between arachnoid and pia mater

37

most significant blood supply to intercranial meninges

middle meningeal artery

38

dorsal roots carry

afferent signals

39

ventral roots carry

efferent v'E'ntral

40

dorsal root cell bodies are located where

dorsal root ganglion

41

ventral root cell bodies are located where

in spinal grey matter

42

spinal nerves leave vertebral canal through

intervertebral foramina

43

at what level does spinal cord end

between L1 and L2

44

H shape in spinal cord called

central canal (with dorsal and ventral horns)

45

what occurs at dorsal horns

termination of afferent neurons and origin of ascending pathways

46

only where do you find the lateral horn

thoracic and upper lumbar cord

47

lateral horn is made up of?

cell bodies of preganglionic neutrons belonging to the sympathetic division of the autonomic NS

48

what is found in white matter

ascending and descending tracts

49

ascending tracts include

dorsal columns
spinocerebrellar tracts
spinothalmic tracts

50

descending tracts include

lateral corticospinal tracts