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Principles > Nervous system > Flashcards

Nervous system Flashcards

1
Q

What is the CNS made up of?

A

brain and spinal cord

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2
Q

What is the PNS made up of?

A

spinal nerves, cranial nerves and autonomic nerves

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3
Q

what is a neuron

A

basic unit of nervous system

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4
Q

function of dendrites?

A

they increase surface area for reception

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5
Q

function of axon?

A

conduct info away from cell body

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6
Q

function of the myelin sheat?

A

increases speed of conduction

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7
Q

what makes the myelin sheath?

A

Schwan cells

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8
Q

What does efferent mean?

A

the motor neurons are efferent as the action potential travels towards body wall, body cavity or organ

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9
Q

What does afferent mean?

A

the sensory neurons are afferent which means the action potential travels towards the brain

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10
Q

What are named nerves?

A

larger nerves supplying body wall, body cavities and organs

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11
Q

What are the 6 ways nerves may conduct?

A

somatic sensory function, somatic motor function, special sensory function, visceral afferent function, sympathetic afferent function, parasympathetic function

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12
Q

What are the folds/bumps in the brain called?

A

gyrics/ a gyrus

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13
Q

What are the indents/grooves in the brain called?

A

Sulci/ a sulcus

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14
Q

CN I

A

olfactory nerve

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15
Q

What type of nerve is the olfactory nerve?

A

sensory (special)

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16
Q

CN II

A

Optic nerve

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17
Q

What type of nerve is the optic nerve?

A

Sensory (special)

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18
Q

CN III

A

oculomotor nerve

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19
Q

What type of nerve is the oculomotor nerve?

A

Motor nerve (somatic and parasympathetic)

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20
Q

CN IV

A

trochlear nerve

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21
Q

What type of nerve is the trochlear nerve?

A

motor nerve

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22
Q

CN V

A

Trigeminal nerve

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23
Q

What type of nerve is the trigeminal nerve?

A

both

24
Q

CN VI

A

Abducent nerve

25
Q

What type of nerve is the abducent nerve?

A

Motor nerve

26
Q

CN VII

A

Facial nerve

27
Q

What type of nerve is the facial nerve?

A

Both (special sensory, somatic motor & parasympathetic)

28
Q

CN VIII

A

Vestibulocochlear nerve

29
Q

What type of nerve is the Vestibulocochlear nerve?

A

Sensory (special)

30
Q

CN IX

A

Glossopharyngeal nerve

31
Q

What type of nerve is the glossopharyngeal nerve?

A

Both (special sensory, somatic motor and parasympathetic)

32
Q

CN X

A

Vagus nerve

33
Q

What type of nerve is the vagus nerve??

A

both (somatic sensory, somatic motor and parasympathetic)

34
Q

CN XI

A

spinal accessory nerve

35
Q

What type of nerve is the spinal accessory nerve?

A

motor

36
Q

CN XII

A

Hypoglossal nerve

37
Q

What type of nerve is the hypoglossal nerve?

A

Motor

38
Q

which nerves are located in the anterior cranial fossa?

A

CN I

39
Q

Which nerves are located in the middle cranial fossa?

A

CN II- CN VI

40
Q

What nerves are located in the posterior cranial fossa?

A

CN VII- CN XII

41
Q

Where does the spinal cord pass-through in the skull?

A

foramen magnum

42
Q

What is the spinal cord protected by?

A

the vertebral canal

43
Q

What are the four segments of the spinal cord?

A

cervical, thoracic, lumbar and sacral/coccygeal

44
Q

What are the enlargements of the spinal cord?

A

cervical and lumbosacral

45
Q

Why are there enlargements in the spinal cord?

A

as these are the places where there are a larger number of nerves that supply the limbs

46
Q

How many pairs of spinal nerves are there together

A

31 pairs

47
Q

How many cervical pairs are there?

A

8 (C1-C8)

48
Q

How many thoracic pairs are there?

A

12 (T1-T12)

49
Q

How many lumbar pairs are there?

A

5 (L1-L5)

50
Q

How many sacral pairs are there?

A

5 (s1-s5)

51
Q

How many coccygeal are there?

A

1

52
Q

How are spinal nerves named?

A

They are named the same as the vertebra above them apart from in the cervical region where they are named the ssame as the vertebra below

53
Q

What would the spinal nerve exiting between C7 and T1 vertebra be named?

A

C8 spinal nerve

54
Q

What would the spinal nerve exiting between L4 and L5 be named?

A

L4 spinal nerve

55
Q

where does the spinal nerve exit?

A

the intervetebral foramen

Principles (17 decks)

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