PSY 001 Lecture Notes - Lecture 16: Polysomnography, Falsifiability, Prefrontal Cortex

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Published on 13 Aug 2020
School
College of The Sequoias
Department
Psychology (PSY)
Course
PSY 001
Professor
Psych 1
David Nguyen
General Psych
Spring 2018
College of the Sequoias
REM and Non-REM Sleep
REM (Rapid Eye Movement sleep, paradoxical sleep): stage characterized by
rapid eye movement, high level of brain activity and deep relaxation of the
postural muscles
It is light because the brain is active and the body's heart rate,
breathing rate, and temperature fluctuate substantially
It is deep because the large muscles of the body that control
posture and locomotive are deeply relaxed
Nerves to those muscles are paralyzed
Reports 85-90% of people report dreaming when awakened at this
time
Dreams are longer, more visual and complicated
Non-REM sleep
Reports 50-60% of people report dreaming when awakened at this
time
EEG and Polysomnography
EEG (electroencephalograph): measures and amplifies tiny
electrical charges on the scalp that reflect patterns of brain
activity
Records and displays brainwave patterns
Long, high amplitude, slow waves= synchrony
among neurons and overall low brain activity
Polysomnography: a device that combines an EEG with a
simultaneous measure of eye movement
Stage 2 has the least waves, stage 4 has the most
Sleep spindles: waves of brain activity of about 12- 14
per second
Each stage lasts about 90-100 minutes
Brain is least active during stage 4
Muscles are least active during REM
Sleep disturbances
Insomnia: not enough sleep for the person to feel rested the next day
Narcolepsy: sudden attacks of sleepiness during the day
Sleep apnea: fail to breathe for a minute or longer and then wakeup gasping for air
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Document Summary

Rem (rapid eye movement sleep, paradoxical sleep): stage characterized by rapid eye movement, high level of brain activity and deep relaxation of the postural muscles. It is light because the brain is active and the body"s heart rate, breathing rate, and temperature fluctuate substantially. It is deep because the large muscles of the body that control posture and locomotive are deeply relaxed. Reports 85-90% of people report dreaming when awakened at this time. Dreams are longer, more visual and complicated. Reports 50-60% of people report dreaming when awakened at this. Eeg (electroencephalograph): measures and amplifies tiny electrical charges on the scalp that reflect patterns of brain activity. Long, high amplitude, slow waves= synchrony among neurons and overall low brain activity. Polysomnography: a device that combines an eeg with a simultaneous measure of eye movement. Stage 2 has the least waves, stage 4 has the most. Sleep spindles: waves of brain activity of about 12- 14 per second.