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Neuro > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

What does the CNS include

A

Brain and spinal cord

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2
Q

What are collections of cell bodies in the CNS called

A

Nuclei

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3
Q

What does the peripheral nervous system included

A

Anything that lies out side of the brain and spinal cord

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4
Q

How many pairs of cranial nerves are there

A

12

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5
Q

How many pairs of spinal nerves are there

A

31

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6
Q

What are collections of cell bodies in the PNS called

A

Ganglia

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7
Q

What part of the nervous system are the cranial nerves part of

A

PNS they are peripheral nerves

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8
Q

What do cranial nerves carry

A

Sensory, motor and autonomic information between the brain and the head neck region

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9
Q

What are the names of the cranial nerves in order

A

Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
Accessory
Hypoglossal

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10
Q

What fibres do the olfactory nerve carry

A

Sensory

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11
Q

What fibres do the optic nerve carry

A

Sensory

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12
Q

What fibres do the oculomotor nerves Carry

A

Motor

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13
Q

What fibres do the trochlear nerves carry

A

Motor

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14
Q

What fibres do the trigeminal nerve carry

A

Both sensory and motor

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15
Q

What fibres do the abducens nerves carry

A

Motor

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16
Q

What fibres do the facial nerves carry

A

Both sensory and motor

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17
Q

What fibres do the vestibulocochlear nerves carry

A

Sensory

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18
Q

What fibres do the glossopharyngeal nerves carry

A

Both sensory and motor

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19
Q

What fibres do the vagus nerves carry

A

Both sensory and motor

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20
Q

What fibres do the accessory nerves carry

A

Motor

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21
Q

What fibres do the hypoglossal nerves carry

A

Motor

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22
Q

What cranial nerves carry parasympathetic fibres

A

Oculomotor
Facial
Glossopharyngeal
Vagus

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23
Q

Where do cranial nerves III to XII originate

A

Brainstem- mid-brain, pons, medulla

24
Q

Where does cranial nerve I originate

A

Cranial nerve I the olfactory nerve is attached to the brain

25
Q

What is the function of cranial nerve 1

A

Smell

26
Q

Where does cranial nerve II originate

A

Cranial nerve II the optic nerve is attached to the brain

27
Q

What is the function of cranial nerve II

A

Vision

28
Q

What is the function of cranial nerves III, IV and VI

A

All carry motor fibres which help to control the extra ocular muscles of the eye

29
Q

What does cranial nerve III innnervate

A

Cranial nerve III is the oculomotor nerve and this innervates the medial rectus, superior rectus, inferior rectus, inferior oblique and Levator palpabrae superioris

30
Q

Where does cranial nerve III carry parasympathetic fibres to

A

The oculomotor nerve carry’s parasympathetic fibres into the orbit to constrict the eye

31
Q

Where is the nuclei of cranial nerve III located

A

Midbrain

32
Q

Where does cranial nerve III exit

A

The oculomotor nerves exit at the junction between the midbrain and the pons

33
Q

What does cranial nerve IV innervate

A

Cranial nerve IV the trochlear nerve innervates the superior oblique in the eye

34
Q

Where is the nuclei of the IV cranial nerve located

A

In the mid brain

35
Q

What does cranial nerve VI innervate

A

Cranial nerve VI is the abducens nerve which innervates the lateral rectus

36
Q

Where are the nuclei of the VI cranial nerve located

A

The pons

37
Q

Where is cranial nerve V attached to

A

The pons

38
Q

What are the 3 branches of cranial nerve V

A

V1- Ophthalmic
V2- Maxillary
V3- Mandibular

39
Q

Of the 3 branches of the V cranial nerve which one carries motor fibres

A

Mandibular branch

40
Q

What do the sensory fibres of cranial nerve V do

A

They carry general sensation

41
Q

Where is cranial nerve VII found

A

Cranial nerve VII is the facial nerve and this is attached to the brainstem at the pontomedullary junction

42
Q

What are the 2 roots of cranial nerve VII

A

Medial which gives off motor fibres
Lateral which gives off sensory and parasympathetic fibres

43
Q

What special sensory fibres do in cranial nerve VII

A

The special sensory fibres in the facial nerve transmit taste of the anterior 2/3 of the tongue

44
Q

Where do upper motor neurons synapse

A

They synapse within the cell bodies of lower motor neurons

45
Q

Where is cranial nerve IX located

A

Cranial nerve IX is the glossopharyngeal nerve which is attached to the medulla via nerve rootlets

46
Q

What are the functions of cranial nerve IX

A

Taste
General sensation
Afferents from the carotid sinus and carotid body

47
Q

Where is cranial nerve X located

A

Cranial nerve X is the vagus nerve and this is found attached to the medulla via small rootlets

48
Q

Where are the rootlets of cranial nerve XI found

A

The rootlets of the accessory nerves arise from the medulla

49
Q

How does cranial nerve XI leave the brain

A

The accessory nerve leaves the brain via the jugular foramen and join the vagus term

50
Q

What does cranial nerve XI innervate

A

Cranial nerve XI is the accessory nerve and this innervates the sternocleidomastoid and trapezius muscle

51
Q

What is cranial nerve XII

A

Hypoglossal nerve

52
Q

What type of fibres does the cranial nerve XII carry

A

Motor nerve fibres

53
Q

What does the hypoglossal nerve innervate

A

Muscles of the tongue

54
Q

Where does cranial nerve XII arise from

A

The medulla

55
Q

How does cranial nerve XII leave the brain

A

Through the hypoglossal canal

Neuro (17 decks)

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