Physiological Psychology Guest Lecture Flashcards

1
Q

Why do we sleep?

A

Important for:
- Immune system functioning.
- Neurological development.
- Memory processing.

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2
Q

What do we measure sleep with?

A

Electroencephalogram (EEG)

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3
Q

What is the gold standard measurement of sleep?

A

Polysomnography

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4
Q

NREM Stag 1 (N1)

A

Transition between wakefulness and sleep.
- Lightest stage of sleep.
- 2-5% of total sleep time.
- Hypnic jerks.
- Theta Activity

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5
Q

NREM Stage 2 (N2)

A

About half the night is spent in N2.
Experience:
- Slower heart rate, breathing, muscle activity, eye movements.
- Reduced body temperature.

Characterized by sleep spindles and K complexes

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6
Q

NREM Stage 3 (N3)

A

“Deep sleep” or “Slow wave sleep”
- Thought of as most restorative sleep stage–memory consolidation, waste clearance.

  • High amplitude delta waves.
  • thought to be most restorative sleep: memory consolidation and waste clearance
  • Predominates the first half of the night.
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7
Q

REM Sleep

A

Rapid Eye Movement Sleep
- Muscle paralysis.
- Dreams
- Easily awoken from this stage.

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8
Q

Sleep Cycles

A

Each cycle lasts approximately 90 minutes.

SWS predominates first half of the night.
REM predominates second half.

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9
Q

Rebound Phenomenon

A

Deficiency in REM sleep is made up later.

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10
Q

Lucid Dream

A

A state where one is physiologically asleep while at the same time aware that they are dreaming, able to intentionally perform diverse actions, and in som cases remember their waking life.

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11
Q

What is slow wave sleep involved in?

A

Memory consolidation.

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12
Q

Daylight Savings Impact on Sleep

A

In the days following daylight savings time there has been:
- 24% increase in myocardial infarction
- 6% increase in traffic accidents
- Increase mood disturbances and suicide.
- Volatility in stock markets.

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13
Q

Fatal Familial Insomnia

A

Progressive insomnia.
- Results in damage to portions of thalamus.
- Death after 12 months.

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