States of Consciousness Flashcards
Consciousness
The process by which the brain creates a model of internal and external experience.
How is consciousness related to other mental processes?
Consciousness can take many forms, while other mental processes occur simultaneously outside our awareness.
Cognitive neuroscience
An interdisciplinary field involving cognitive psychology, neurology, biology, computer science, linguistics, and specialists from other fields who are interested in the connection between mental process and the brain.
Levels of consciousness
Simultaneous layers of awareness of the world around us
- conscious
- nonconscious
- preconscious
- subconscious
- unconscious
Conscious level
Information about self and environment that you are currently aware of
Focusing on these words and their meanings
Nonconscious level
Body processes controlled by the mind that we are not usually aware of
Heartbeat, respiration, digestion
Nonconscious processes
Any brain process that does not involve conscious processing, including both preconscious memories and unconscious processes.
Unconscious level
Psychoanalytic psychologists believe some events and feelings are unacceptable to our conscious mind and are repressed into the unconscious mind
Subconscious level
Information that we are not aware of but know must exist due to behavior
-Priming, mere-exposure effect
Tools for studying consciousness
- Mental rotation tasks
- zooming in tasks
Preconscious memories
Information that is not currently in consciousness but can be recalled to consciousness voluntarily or after something calls attention to them
Unconscious
In Classic Freudian theory, a part of the mind that houses memories, desires, and feelings that would be threatening if brought to consciousness. Many modern cognitive psychologists view the unconscious in less sinister terms, merely as a collection of mental processes that operate outside of awareness– but not typically suppressing information or working at odds with consciousness.
What cycles occur in everyday consciousness?
Consciousness changes in cycles that correspond to our biological rhythms and to the patterns of stimulation in our environment.
Daydreaming
A common (and quite normal) variation of consciousness in which attention shifts to memories, expectations, desires, or fantasies and away from the immediate situation.
Circadian rhythms
Physiological patterns that repeat approximately every 24 hours, such as the sleep-wakefulness cycle.
Sleep
An altered state in which people become relatively unaware of external stimulation.
Sleep cycles
Typical patten of sleep
Sleep stages
Brain waves and level of awareness change as we cycle through the stages
Sleep onset, 1, 2, 3, 4, REM
REM sleep
A stage of sleep that occurs approximately every 90 minutes, marked by bursts of rapid eye movement occurring under closed eyelids. REM sleep periods are associated with dreaming.
Non-REM (NREM) sleep
The recurring periods, mainly associated with the deeper stages of sleep, when a sleeper is not showing rapid eye movements.
Sleep paralysis
A condition in which a sleeper is unable to move any of the voluntary muscles, except those controlling the eyes. Sleep paralysis normally occurs during REM sleep.
REM rebound
A condition of increased REM sleep caused by REM-sleep deprivation.
Sleep debt
A sleep deficiency caused by not getting the amount of sleep that one requires for optimal functioning.
Manifest content
The story line of a dream, taken at face value without interpretation.
Activation-synthesis theory
The theory that dreams begin with random electrical activation coming from the brain stem. Dreams, then, are the brain’s attempt to make sense of - to synthesize - this random activity.
-biological perspective
Sleep disorders
Periods of disruption in the sleep pattern
Insomnia
The most common of sleep disorders – involving insufficient sleep, the inability to fall asleep quickly, frequent arousals, or early awakenings.
How much sleep do the elderly need?
6 hours
Go to bed later, wake up earlier
World record for staying awake
11 days
Effects of missed sleep on body
Immune system weakens
Metabolic malfunction
Varied body temperature
Effects of missed sleep on brain
Moodiness Decreased cognitive performance Blurred vision Disorganized speech Hallucinations
Night terrors
Deep sleep episodes that seem to produce terror, although any terrifying mental experience (such as a dream) is usually forgotten upon awakening. Night terrors occur mainly in children.
How much sleep do infants need?
20 hours, 50% REM
How much sleep do children and adolescents need?
10 hours, 25-30% REM
Go to bed later, wake up later
How much sleep do adults need?
8 hours, 20% or less REM
Latent content
The symbolic meaning of objects and events in a dream. Latent content is usually an interpretation based on Freud’s psychoanalytic theory or one of its variants. The latent content of a dream involving clocks might involve fear of the menstrual cycle and, hence, of one’s sexuality.
Cataplexy
Sudden loss of muscle control
What other forms can consciousness take?
An altered state of consciousness occurs when some aspect of normal consciousness is modified by mental, behavioral, or chemical means.
Hypnosis
An induced state of awareness, usually characterized by heightened suggestibility, deep relaxation, and highly focused attention.
Sleep apnea
A respiratory disorder in which the person intermittently stops breathing many times while asleep
Dreams as Problem Solving
- dreams reflect emotional preoccupations of waking life
- images in a dream are sometimes symbols for things in everyday life
- no latent meaning (only manifest)
Mental Housekeeping Theory
- during sleep, the brain shuts out sensory input so it can process what was stored in memory during the day
- dreams are brief glimpses of the brain’s sorting, scanning, and searching through memories
- no meaning