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Flashcards in CNS Deck (115)
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1

What two tissues does the CNS comprise of?

Grey and white matter

2

What does grey matter contain?

Nerve cell bodies, dendrites and synapses

3

What does white matter contain?

Axons of nerves

4

What are clusters of cell bodies in the CNS called?

nuclei

5

What causes the colour of white matter?

The fat in the myelin sheaths

6

How is white matter organised in the CNS?

organised into bunches called tracts

7

Where is the grey and white matter in the spinal cord?

grey matter is contained inside white matter on the periphery

8

Where is grey and white matter in the cerebral hemispheres?

Grey matter forms an outer cortex and white matter a central mass

9

Where and what is the basal nuclei?

In the deep part of the cerebral hemispheres and is interwoven grey and white matter

10

What is the basal nuclei also know as?

Corpus striatum

11

What is the CNS made up of?

Brain and spinal cord

12

What are ridges and furrows in the cerebral cortex called?

ridges- gyri
furrows- sulci

13

What are the two cerebral hemispheres separated by?

longitudinal fissure

14

How is the cerebrum and cerebellum separated?

Transverse fissure

15

What is the major sulcus which crosses longitudinal fissure called?

cruiciate sulcus

16

What are folds of the cerebellum called?

Folia

17

What is the major gyrus on the lateral aspect called?

sylvan gyrus

18

What is the cortex of the cerebellum made of?

Outer cortex is made up of grey matter with central nuclei

19

Where is the cerebellum found?

caudal to the cerebral hemispheres

20

What does the organises white matter look like?

resembles a tree

21

What is the white matter of the cerebellum often referred to as?

arbor vitae

22

How many lateral hemispheres does the cerebellum have?

2

23

What is the central part of the cerebellum called?

Vermis

24

How does the cerebellum connect to the brainstem?

by three peduncles

25

What fluid surrounds the brain and spinal cord?

Cerebrospinal fluid (CSF)

26

What does the CSF circulate round the brain in?

A series of ventricles

27

Describe the flow of CSF

Two lateral ventricles in the cerebral hemispheres communicate with a single third ventricle which surrounds the thalamus, the third communicates with the fourth ventral to the cerebellum and connects to the spinal cord

28

How can the cerebral hemispheres be divides according to bones of the skull?

Frontal, parietal, temporal, occipital

29

How can the cerebral cortex be divided according to function?

visual cortex in occipital lobe, motor cortex rostral to cruciate sulcus, somatosensory cortex next caudal sulcus and auditory in temporal

30

What is the function of the rhinencephalon?

Smell (olfaction)