Sleep Physiology: Functions and Stages

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What is the characteristic of the EEG during stage 1 sleep?

The presence of spindle waves and K-complexes

A decrease in high-frequency activity (correct)

Delta wave oscillations

An increase in high-frequency activity

What is the function of the ocular muscles during REM sleep?

They are responsible for penile erection

They are inhibited, causing a lack of eye movement

They are responsible for regulating body temperature

They are not inhibited, allowing for eye movement (correct)

What is the characteristic of dreams during non-REM sleep?

Shorter, less visual, less emotional, and more conceptual (correct)

Longer, more visual, and more emotional

Relatively long, primarily visual, and somewhat emotional

Shorter, more visual, and less emotional

What is the duration of the sleep cycle from waking to REM sleep?

30 minutes Signup and view all the answers

What is the purpose of circadian rhythms?

To maximize the use of the day-night cycle Signup and view all the answers

What is the current view of sleep?

A highly organized state generated by the cooperative interplay of many behavioural and neural components Signup and view all the answers

What is the primary function of the EEG in sleep research?

To measure brain activity during sleep Signup and view all the answers

What is the characteristic of brain activity during wakefulness?

Low-voltage, high-frequency activity Signup and view all the answers

What is the purpose of the EMG in sleep research?

To measure muscle tone during sleep Signup and view all the answers

What is the primary reason for the reduction of sensory input during sleep?

To allow for the body to rest and recover Signup and view all the answers

What is the characteristic of brain activity during non-REM sleep?

High-voltage, low-frequency activity Signup and view all the answers

What is the purpose of the electrooculogram (EOG) in sleep research?

To measure eye movements Signup and view all the answers

What is the characteristic of stage 1 sleep?

A transition between waking and sleep Signup and view all the answers

What is the relationship between REM and non-REM periods in sleep?

REM and non-REM periods alternate throughout sleep Signup and view all the answers

What is the primary characteristic of spindle waves during stage 2 sleep?

7-15 Hz oscillations over 1-2 seconds Signup and view all the answers

During which stage of sleep does the body temperature begin to fall?

Stage 2 Signup and view all the answers

What is the typical frequency of delta wave oscillations during stage 3 sleep?

0.5-4 Hz Signup and view all the answers

What is the primary difference between REM and non-REM dreams?

All of the above Signup and view all the answers

What is the primary function of circadian rhythms?

To anticipate the rising and setting of the sun Signup and view all the answers