PSYC1003 Lecture Notes - Lecture 12: Sleep Spindle, Problem Solving, Nonbenzodiazepine
Psychology 1003 October 26th and 28th
Chapter 5. Variations in Consciousness
Variations in Awareness and Control
Consciousness: awareness of internal and external stimuli
James (1902): “stream and consciousness” consciousness is constantly changing
Mind wandering
Unconsciousness thought effects: difference between controlled and automatic processes
Unconscious decisions: could unconscious decisions lead to better outcomes?
Consciousness and Brain Activity
The electroencephalograph (EEG): monitoring of brain electrical activity
-physiological index of consciousness
Brain waves: -Frequency (cycles per second)
-Beta (alertness/problem solving)
-Alpha (resting/relaxation)
-Theta (low alertness/sleep)
-Delta (deep, dreamless sleep)
Sleep and Dreaming
Biological Rhythms and Sleep
Circadian rhythms: 24 hr biological cycles
-regulation of sleep/ other bodily functions
Physiological pathway: light levels > retina > suprachiasmatic nucleus of hypothalamus > pineal gland >
secretion of melatonin
Melatonin: hormone that plays a role in sleep/ maintaining circadian rhythms
-ignoring and realigning circadian rhythms
Jet Lag: -3hrs +take several days to adjust
-travelling westward is easier
Shift work: -less total sleep/inferior quality
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
James (1902): stream and consciousness consciousness is constantly changing. Unconsciousness thought effects: difference between controlled and automatic processes. The electroencephalograph (eeg): monitoring of brain electrical activity. Physiological pathway: light levels > retina > suprachiasmatic nucleus of hypothalamus > pineal gland > secretion of melatonin. Melatonin: hormone that plays a role in sleep/ maintaining circadian rhythms. Jet lag: -3hrs +take several days to adjust. Stage 5: rem (rapid eye movement) , eeg similar to awake, vivid dreaming. Hypothesis 1: sleep evolved to conserve organisms" energy. Hypothesis 2: immobilization during sleep is adaptive because it reduces danger. Hypothesis 3: sleep helps animals to restore energy and other bodily resources. Partial deprivation or sleep restriction: impaired attention, reaction time, coordination, and decision making. Selective deprivation: rem and slow-wave sleep: rebound effect. Insomnia hyper-arousal: heart rate, temperature, eeg, and metabolic activation. Sleep apnea: reflective gasping for air that awakens the sleeper. Nightmares: anxiety-arousing dreams (take place during rem sleep)
