Anatomical Organisation of the Nervous System Flashcards

1
Q

What is ectodermal tissue?

A

One of the first 3 layers of cells that are formed in the early embryo.

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2
Q

What are the first 3 layers of cells formed in the embryo?

A

Ectodermal, mesodermal and endodermal.

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3
Q

What is a neural tube?

A

A hollow structure that develops to form the brain and spinal tube.

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4
Q

What is CSF?

A

Cerebrospinal fluid.

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5
Q

What does CSF do?

A

Mechanically and immunologically protects the brain and spine.

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6
Q

What happens to the neural tube after 28 days?

A

It splits into three chambers.

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7
Q

Which three sections does the neural tube develop into?

A

The forebrain, midbrain and hindbrain.

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8
Q

What is the prosencephalon?

A

The forebrain

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9
Q

What is the mesencephalon?

A

The midbrain

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10
Q

What is the rhombencephalon?

A

The hindbrain.

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11
Q

How many ventricles are there in the ventricular system?

A

4

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12
Q

Which ventricles are in the prosencephalon/forebrain?

A

The left and right lateral ventricle.

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13
Q

Which ventricles are in the mesencephalon/midbrain?

A

Third ventricle

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14
Q

Which ventricles are in the rhombencephalon/hindbrain?

A

Fourth ventricle

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15
Q

What is the dura mater?

A

A bag of fibrous tissue that carries the central nervous system.

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16
Q

What is the choroid plexus?

A

Network of small blood vessels within the ventricles in the brain.

Choroid = blood-related

Plexus = branching network of vessels/nerves

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17
Q

What does the cerebral aqueduct do?

A

Connects the 3rd ventricle to the 4th ventricle.

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18
Q

What is apoptosis?

A

Programmed cell death

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19
Q

What is necrosis?

A

Unprogrammed cell death, caused by infection, injury, cancer or inflammation.

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20
Q

What do neurotrophic factors do?

A
  • Support the growth and survival of neurons.

- Decide and keep which neurons are the most useful.

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21
Q

What are the two sections of the forebrain?

A

Telencephalon and the diencephalon

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22
Q

Which part of the brain contains the telencephalon?

A

Forebrain

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23
Q

Which part of the brain contains the diencephalon?

A

Forebrain

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24
Q

What does the telencephalon contain?

A

Cerebral cortex, basal ganglia and the limbic system.

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25
Q

What does the diencephalon contain?

A

Thalamus and hypothalamus. (and 3rd ventricle)

26
Q

What is the basal ganglia involved in?

A

Movement and co-ordination

27
Q

What does the thalamus do?

A

Relays sensory information. (centre for pain perception)

28
Q

What does the hypothalamus do?

A

Controls the autonomic nervous system.

29
Q

What are the two sections in the midbrain?

A

Tectum and tegmentum.

30
Q

Which region of the brain contains the tectum?

A

Midbrain / mesencephalon

31
Q

Which region of the brain contains the tegmentum?

A

Midbrain / mesencephalon

32
Q

What does the tectum contain?

A

Superior colliculus and periaqueductal grey.

33
Q

What does the tegmentum contain?

A

Periaqueductal grey.

34
Q

What does the superior colliculus do?

A

Simple visual processing.

35
Q

What does the periaqueductal grey do?

A

Handles pain information

36
Q

Which 3 sections does the hind brain contain?

A

Cerebellum, pons and medulla.

37
Q

Which section of the brain is the cerebellum found?

A

Hindbrain

38
Q

Which section of the brain are the pons found?

A

Hindbrain

39
Q

Which section of the brain is the medulla found?

A

Hindbrain

40
Q

What is the function of the cerebellum?

A

Balance and movement

41
Q

What is the function of the pons?

A

Links the medulla and the thalamus.

42
Q

What is the function of the medulla?

A

Basic processes such as breathing and cardiac control.

43
Q

What is the median longitudinal fissure?

A

A deep groove that separates the two hemispheres in the brain.
(also called the cerebral fissure)

44
Q

What is the central sulcus?

A

A groove that separates the frontal and parietal lobes.

45
Q

What is the parieto-occipital fissure?

A

A groove that separates the parietal and occipital lobes.

46
Q

What is the lateral fissure?

A

A grove that separates the temporal and frontal lobes.

47
Q

What are the two main cortices in the frontal lobe?

A

Motor cortex and prefrontal cortex.

48
Q

What is the parietal lobe responsible for?

A

Touch

49
Q

What is the temporal lobe responsible for?

A

Hearing and the limbic system.

50
Q

What is the occipital lobe responsible for?

A

Vision

51
Q

What are the functions of the prefrontal cortex?

A
  • Executive functioning
  • Planning
  • Response inhibition
52
Q

What does the limbic system deal with?

A
  • Emotion

- Memory

53
Q

Which sections of the brain make up the limbic system?

A

Hippocampus, amygdala and hypothalamus.

54
Q

What does the CNS consist of?

A

The brain and spinal cord

55
Q

What does the PNS consist of?

A

Axons which run from the spine/brain to the body/head.

56
Q

What are viscera?

A

Your main internal organs

57
Q

What is the ANS?

A

Autonomic nervous system

58
Q

What is the ANS controlled by?

A

Limbic system, esp Hypothalamus

59
Q

What are the two divisions of the ANS?

A

Sympathetic and Parasympathetic

60
Q

What is the critical neurochemical of the sympathetic division of the ANS?

A

Noradrenalin (NA)

61
Q

What is the critical neurochemical of the parasympathetic division of the ANS?

A

Acetylcholine (Ach)