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Physiology > CNS organisation > Flashcards

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?

A

Cortex

23
Q

What is a deep cleft referred to as?

A

A fissure

24
Q

What is a shallow cleft called?

A

A sulcus

25
Q

What is each ridge called in a telencephalon?

A

A gyrus

26
Q

What is the cortex referred to as?

A

Grey matter

27
Q

What are the axons covered by myelin sheath referred to as?

A

White matter

28
Q

What is the surface of the hemispheres divided into?

A
  • Frontal
  • Temporal
  • Parietal
  • Occipital
29
Q

SLIDE

A

13

Physiology (28 decks)

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