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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?

24
Q

CN VI

A

Abducent nerve

25
What type of nerve is the abducent nerve?
Motor nerve
26
CN VII
Facial nerve
27
What type of nerve is the facial nerve?
Both (special sensory, somatic motor & parasympathetic)
28
CN VIII
Vestibulocochlear nerve
29
What type of nerve is the Vestibulocochlear nerve?
Sensory (special)
30
CN IX
Glossopharyngeal nerve
31
What type of nerve is the glossopharyngeal nerve?
Both (special sensory, somatic motor and parasympathetic)
32
CN X
Vagus nerve
33
What type of nerve is the vagus nerve??
both (somatic sensory, somatic motor and parasympathetic)
34
CN XI
spinal accessory nerve
35
What type of nerve is the spinal accessory nerve?
motor
36
CN XII
Hypoglossal nerve
37
What type of nerve is the hypoglossal nerve?
Motor
38
which nerves are located in the anterior cranial fossa?
CN I
39
Which nerves are located in the middle cranial fossa?
CN II- CN VI
40
What nerves are located in the posterior cranial fossa?
CN VII- CN XII
41
Where does the spinal cord pass-through in the skull?
foramen magnum
42
What is the spinal cord protected by?
the vertebral canal
43
What are the four segments of the spinal cord?
cervical, thoracic, lumbar and sacral/coccygeal
44
What are the enlargements of the spinal cord?
cervical and lumbosacral
45
Why are there enlargements in the spinal cord?
as these are the places where there are a larger number of nerves that supply the limbs
46
How many pairs of spinal nerves are there together
31 pairs
47
How many cervical pairs are there?
8 (C1-C8)
48
How many thoracic pairs are there?
12 (T1-T12)
49
How many lumbar pairs are there?
5 (L1-L5)
50
How many sacral pairs are there?
5 (s1-s5)
51
How many coccygeal are there?
1
52
How are spinal nerves named?
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
What would the spinal nerve exiting between C7 and T1 vertebra be named?
C8 spinal nerve
54
What would the spinal nerve exiting between L4 and L5 be named?
L4 spinal nerve
55
where does the spinal nerve exit?
the intervetebral foramen

Principles (17 decks)

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