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SO-Nervous System > The CNS and PNS > Flashcards

The CNS and PNS Flashcards

1
Q

What portions does the PNS consist of?

A

Somatic and autonomic

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2
Q

What is the autonomic portion of the PNS concerned with?

A

Unconscious sensation and involuntary movement

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3
Q

What does the autonomic portion of the PNS consist of?

A
  • Sympathetics
  • Parasympathetics
  • Enteric system
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4
Q

What is the somatic portion of the PNS concerned with?

A

Conscious sensation and voluntary movements

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5
Q

What are the parts of the CNS?

A
  • Cerebrum
  • Cerebellum
  • Brainstem
  • Spinal cord
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6
Q

What is the cerebrum concered with?

A

Higher cognitive function, e.g. eye movements, primitive aspects of hearing and vision

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7
Q

What is the cerebrum concerned with?

A
  • Potential cognitive functions
  • Coordination
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8
Q

What are the parts of the brainstem?

A
  • Midbrain
  • Pons
  • Medulla
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9
Q

What are the functions of the midbrain?

A
  • Eye movements
  • Primitive aspects of hearing and vision \
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10
Q

What are the functions of the pons?

A
  • Cochlear and vestibular centres
  • Connecting the two halves of the cerebrum
  • Feeding
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11
Q

How is the pons involved in feeding?

A

It contains the pattern generator for chewing

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12
Q

What is the function of the medulla?

A
  • Autonomic functions - CVS regulatory centres, pattern generator for breathing
  • Connects brain to spinal cord
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13
Q

Can the CNS regenerate?

A

No, apart from certain regions

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14
Q

Give two examples of exceptions to the rule that the CNS cannot regenerate

A
  • Olfactory nerves
  • Pituitary stalk axons
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15
Q

Can the PNS regenerate?

A

Yes, but not always perfectly

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16
Q

How do the CNS and PNS differ in terms of sophistication?

A

The CNS is sophisticated, the PNS is not

17
Q

What kind of tumours can the CNS get?

A

Benign or malignant

18
Q

What tumours can the PNS get?

A

Tend to only get benign tumours, e.g. benign Schwannomas

19
Q

What myelinates CNS neurones?

A

Oligodendocytes

20
Q

What myelinates PNS neurones?

A

Schwann cells

21
Q

Describe the immune response of the CNS?

A

Attenuated, therefore infections are very serious

22
Q

Describe the immune system in the PNS?

A

Macrophages in PNS, and other immune cells can access

23
Q

Describe the lymphatic drainage of the CNS

A

The CNS has a glymphatic system, where drainage mostly occurs at night

24
Q

What is the result of glymphatic drainage mostly occuring at night?

A

Less sleep results in reduced removal of denatured proteins, so increased risk of Alzheimers

25
Q

Describe the lymphatic drainage of the PNS?

A

Normal lymphatic system

SO-Nervous System (18 decks)

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