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Flashcards in Neuroanatomy Deck (30)
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1

What are the 2 types of nervous cells

Neurons
Glial cells

2

What is a neuron?

Cell with multiple dendrites and one axon

3

How do neurons transmit action potentials?

Action potentials can travel in one direction from cell body to synaptic terminal

4

Where is the cell body of sensory neurons located?

Dorsal root ganglion

5

What is the function of myelin sheaths?

Increasing conduction speed in axons by saltatory conduction

6

What is multiple sclerosis?

Patchy loss/scarring of myelin sheath, resulting in abnormal nerve conduction across affected axons

7

What will be present on an MRI of multiple sclerosis?

Whitish plaques of demyelination

8

What are the different types of neurons?

Multipolar
Bipolar
Pseudopolar

9

How are neurons organised?

Axons are bundled together depending on what information they carry

10

What forms the grey matter inside the CNS?

Cell bodies and non myelinated axons
Nuclei

11

What forms the white matter inside the CNS?

Myelinated axons/ tracts of axons

12

What do cell bodies form in the periphery?

Ganglia

13

What do myelinated axons form in the periphery?

Nerves

14

What type of glial cells secrete myelin?

Ogliodendrocytes
Schwann

15

How is the neural tube formed?

Neural plate thickens and folds over

16

At what stage in development are vesicles formed?

Primary vesicles - week 4
2ry vesicles - week 5

17

What are the ventricles of the brain?

2 lateral vesicles
3rd ventricle
4th ventricle

18

What do the ventricles contain?

CSF

19

Where are the lateral ventricles located?

Cerebral hemispheres

20

Where is the 3rd ventricle located and what connects it to the lateral ventricles?

Diencephalon
Connected by the inter ventricular foramen

21

Where is the 4th ventricle located?

Hindbrain

22

Where is the cerebral aqueduct located?

Midbrain

23

What are the 3 coverings of the CNS?

Dura mater
Arachnoid mater
Pia mater

24

What are the 3 coverings of the CNS collectively known as?

Meninges

25

Where is CSF located?

Ventricles of the brain
Central canal of spinal cord
Between the pia mater and arachnoid mater

26

What is the CSF responsible for?

Maintaining intracranial pressure

27

How many dural folds are there?

4

28

What is the function of dural folds?

Keeps the various parts of the brain in place

29

What is the function of the blood brain barrier?

Helps maintain a stable environment for the brain
Prevents harmful amino acids and ions present in bloodstream entering the brain

30

What areas of the brain do not have a blood brain barrier?

Hypothalamus
Posterior pituitary