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Flashcards in Principles Nerves Deck (78)
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1

What do nerves do?

Sense things, move, make secretions, reflexes and emote, think , remember (higher functions)

2

What makes up the central nervous system?

Brain
Spinal cord

3

What makes up the peripheral nervous system?

Nerves or parts of nerves that are not located within the brain or spinal cord eg. cranial nerves, spinal nerves and autonomic nerves

4

What is a group of nerve cell bodies called in the CNS?

nucleus

5

What is a group of nerve cell bodies called in the PNS?

a ganglion

6

What is an axon?

A nerve fibre- an electrical cable conveying action potentials

7

When is the tern nerve used?

When refering to a peripheral nerve

8

What is a bundle of axons travelling in the CNS called?

tract

9

What is a bundle of axons travelling in the PNS called?

peripheral nerve

10

What is the myelin sheath?

Electrical insultor- myelinated nerves conduct action potentials faster

11

Give an example of a named nerve

Musculocutaneous nerve- supplies the biceps brachi

12

Which nerves are big enough to be seen?

Peripheral nerves and their branches can often be seen in dissection.

13

What is a synapse?

One neuron communicates with another neurone in a ganglion in the PNS or in the nucleus in the CNS

14

What happens at a synapse?

An electrical signal or action potential becomes a chemical signal (neurotransmitter) then an electrical signal (AP) again

15

What is a dendrite?

Extensions of the nerve cell

16

What are the main parts of the brain?

Cerebrum, cerebellum, brain stem and spinal cord

17

What is a gyrus?

One if the 'sausage' type fold in the brain- pleural = gyri

18

What is a sulcus?

The space in between the folds of the brain- pleural= sulci

19

What is the cerebral neocortex?

Outermost layer of the cerebral hemisphers consisting of all the gyri and sulci

20

How ae the four lobes of each cerebral hemisphere named?

According to the bone of the cranial vault they lie deep to ie. frontal, parietal, temporal and occipital

21

What separates the two cerebral hemispheres sagitally?

Sagittally through the longitudinal fissure.

22

Name the cranial nerves.

1. Olfactory
2. Optic
3. Oculomotor
4. Trochlear
5. Trigeminal
6. Abducent
7. Facial
8. Vestibulocochlear
9. Glossopharyngeal
10. Vagus
11. Spinal accessory
12. Hypoglossal

23

How does the cranial nerves pass between the brain and periphery?

Through foraminae/fissures/canal at the base of the skull

24

What are the foraminae for the cranial nerves?

Cribriform plate of the ethmoid bone
Optic canal
Superior orbital fissure
Foramen rotundum
Foramen ovale
Internal acoustic meatus
Jugular foramen
Hypoglassal canal
Foramen magnum

25

How does CN I pass through the base of the skull?

Cribriform plate of the ethmoid bone

26

Which cranial nerve pass through the optic canal?

CN II

27

Which cranial nerve passes through the foramen rotundum?

CN V2

28

Which cranial nerve passes through the foramen ovale?

CN V3

29

Which cranial nerves pass through the internal acoustic meatus?

CN VII, VIII

30

Which cranial nerves pass through the jugular foramen?

CN IX, X, XI