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Anatomy > The Nervous System > Flashcards

The Nervous System Flashcards

1
Q

What is the CNS composer of?

A

The Brain and Spinal Cord

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2
Q

What makes up the Peripheral nervous system?

A

All the nerve tissue not in the CNS
Spinal nerves
Cranial nerves
Autonomic nerves

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3
Q

What do dendrites do?

A

They increase the cell body area. They receive information from other neurons and bring them to the body for processing.

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4
Q

What is the Axon/Nerve Fibre?

A

Longest process from the body. Electrical wire that carries action potential from one Neurone to the next.

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5
Q

What are bundles of axons called?

A

Nerve (PNS)

Tract (CNS)

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6
Q

What is the myelin sheath?

A

It is an electrical insulator covering bundles of axons.

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7
Q

What does the brain consist of?

A

Gyri (folds) and Sulci (grooves)

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8
Q

What are the 4 lives of each cerebral hemisphere?

A

Occipital, Parietal, Temporal and Frontal Lobe

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9
Q

What is Cranial Nerve I?

A

The olfactory nerve.

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10
Q

What is Cranial Nerve II?

A

The optic nerve.

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11
Q

What is Cranial Nerve III?

A

Oculomotor Nerve.

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12
Q

What is Cranial Nerve IV?

A

Trochlear Nerve

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13
Q

What is Cranial Nerve V?

A

The Trigeminal Nerve

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14
Q

What is Cranial Nerve VI?

A

Abducent Nerve

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15
Q

What is Cranial Nerve VII?

A

Facial Nerve

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16
Q

What is Cranial Nerve VIII?

A

Vestibulocochlear nerve

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17
Q

What is Cranial Nerve IX?

A

Glossopharyngeal nerve

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18
Q

What is Cranial Nerve X?

A

Vagus Nerve

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19
Q

What is Cranial Nerve XI?

A

Spinal Accessory Nerve

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20
Q

What is Cranial Nerve XII?

A

Hypoglossal Nerve

21
Q

How are spinal nerves named?

A

According to the vertebrae below

22
Q

Where do the spinal cords come out to reach the body?

A

Intervertebral foraminae

23
Q

Where does the spinal cord pass through when leaving the brain?

A

Foramen Magnum

24
Q

What are the 4 segments of the spinal cord?

A

Cervical
Thoracic
Lumbar
Sacral/Coccygeal

25
Q

How many pairs of spinal nerves are there?

A

31

26
Q

At which vertebral level does the spinal cord end?

A

L1/L2

27
Q

What is the name of the end of the spinal cord?

A

Conus Medullaris

28
Q

What is the extension of the lumbar and sacral nerve roots of the spinal cord called?

A

Cauda Equina

29
Q

What do the spinal nerves supply?

A

The body wall

30
Q

Where are the spinal nerves located?

A

Only within the Intervertebral Foraminae.

31
Q

What do the spinal nerves connect with?

A

Structures of the Soma (via rami)

The spinal cord (via roots and rootlets)

32
Q

What is a Dermatome?

A

Strip of skin supplied by both the anterior and posterior rami of the spinal nerves.

33
Q

Where is the male nipple located?

A

T4 Dermatome

34
Q

Where is the umbilicus located?

A

T10 Dermatome

35
Q

What are plexuses?

A

Networks of intertwined anterior rami.

36
Q

What does the cervical plexus supply?

A

Posterior scalp
Neck wall
Diaphragm

37
Q

What does the brachial plexus supply?

A

The upper limb

38
Q

What does the lumbar plexus supply?

A

The lower limb

39
Q

What does the Sacral

Plexus supply?

A

The lower limb
Gluteal region
Perineum

40
Q

In the brachial plexus, what are the 5 names nerves which supply the upper limb?

A 
Axillary 
Median
Musculocutaneous 
Radial 
Ulnar
41
Q

Where do the sympathetic nerves exit the spinal cord?

A

T1-L2 spinal nerves

42
Q

What is the outflow of the parasympathetic axons?

A

Craniosacral

43
Q

What nervous system deals with the external environment?

A

Somatic nervous system

44
Q

What does the autonomic nervous system do?

A

Deals with the internal environment

45
Q

Where is the autonomic nervous system located?

A

Internal organs within body cavities and body wall organs

46
Q

What is Motor (efferent)?

A

Action potential towards the body wall, body cavity or organ

47
Q

What is Sensory (afferent)?

A

Action potentials towards the brain

48
Q

What is a nerve?

A

Bundles of axons (nerve fibres) wrapped in connective tissue

Anatomy (9 decks)

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