CNS organisation Flashcards

1
Q

What is the nervous system broken down into?

A
  • Peripheral nervous system

- Central nervous system

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2
Q

What is the peripheral nerve system broken down into?

A
  • Autonomic nervous system

- Somatic nervous system

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3
Q

What is the central nervous system composed of?

A
  • Brain

- Spinal cord

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4
Q

What is the brain composed of?

A
  • Forebrain
  • Midbrain
  • Hindbrain
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5
Q

Ipsilateral meaning

A

On the same side of the body/brain

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6
Q

Contralateral meaning

A

On the opposite side of the body/brain

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7
Q

Ventral meaning

A

Pointing towards the ground

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8
Q

Rostral meaning

A

Anterior

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9
Q

Caudal meaning

A

Posterior

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10
Q

How much blood flow does the brain receive from the heart?

A

20%

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11
Q

Why is continuous blood flow essential?

A

As the brain cannot store glucose / extract energy without oxygen.

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12
Q

What will a 1 second interruption in blood flow do?

A

Use up all of brain resources

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13
Q

What will a 6 second gap in blood flow do?

A

Produce unconsciousness

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14
Q

What are the two major arteries that serve the brain?

A
  • Vertebral arteries

- Internal carotid arteries

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15
Q

What portion of the brain do the vertebral arteries serve?

A

Caudal portion

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16
Q

What portion of the brain do the internal carotid arteries serve?

A

Rostral portion

17
Q

Where do the vertebral arteries enter?

A

At the base of the skull

18
Q

Where so the internal carotid arteries ascend?

A

The left and right sides of the neck

19
Q

What do the vertebral and internal carotid arteries join to form?

A

Basilar artery

20
Q

How is potential damaged minimised?

A

As there is overlap between arterial systems in case a vessel becomes blocked (stroke).

21
Q

What are the hemispheres of the brain separated by?

A

Longitudinal fissue

22
Q

What are the hemispheres covered by?

23
Q

What is a deep cleft referred to as?

24
Q

What is a shallow cleft called?

25
What is each ridge called in a telencephalon?
A gyrus
26
What is the cortex referred to as?
Grey matter
27
What are the axons covered by myelin sheath referred to as?
White matter
28
What is the surface of the hemispheres divided into?
- Frontal - Temporal - Parietal - Occipital
29
SLIDE
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