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Phase 1 - S4 Nervous System > Introduction > Flashcards

Flashcards in Introduction Deck (38)
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1

what are the components of the CNS

cerebral hemispheres, brainstem, cerebellum, spinal cord

2

what are the components of the PNS

dorsal and ventral roots, spinal nerves, peripheral nerves

3

is the cauda equina part of the CNS or PNS

PNS as its made up of dorsal and ventral roots

4

what is grey matter

area of the CNS composed of cell bodies and is highly vascular

5

why is grey matter highly vascular

as it is very metabolically active

6

what is white matter

area of the CNS made up of axons

7

why is white matter white

the axons are myelinated giving a white colour

8

what are ganglia

collections of cell bodies in the PNS

9

what is the equivalent of white matter in the PNS

peripheral nerves

10

at what level does the caudal equina start

L1

11

are dorsal nerves sensory or motor

sensory

12

are ventral nerves sensory or motor

motor

13

what isa funiculus

a segment of white matter which contains axons going up and down the spinal cord

14

what is a tract

an area of white matter containing axons traveling in one direction only to connect 2 areas of grey matter

15

what is a fasciculus

a part of a tract supplying a distinct region of the body

16

what is a nucleus in the CNS

a collection of cell bodies

17

what is the Cortex of the brain

a layer of grey matter on the brain surface

18

what are fibres which are found in white matter

axons which are myelinated and connect 2 regions of grey matter together

19

what are association fibres

fibres/axons which connect regions of grey matter in the same hemisphere

20

what are commissural fibres

fibres/axons which connect regions of grey matter from different hemispheres

21

what type of fibre is the corpus callosum

commissural fibre

22

what are projection fibres

fibres/axons which connect the brain to the spinal cord and the spinal cord to the brain

23

what are the general functions of the midbrain

eye movements and reflexes to vision and sound

24

what are the general functions of pons

feeding and sleeping

25

what are the general functions of the medulla

cardiovascular and respiratory control

26

what sulcus surrounds the primary visual cortex

calcarine sulcus

27

what is the uncus

part of the temporal lobe which may herniate to compress the midbrain.
important olfactory role

28

what is the parahippocampal gyrus

a region involved in memory

29

what is the thalamus

a region where sensory fibres pass through

30

what is the fornix

output pathway from the hippocampus