SLEEP: CONSCIOUSNESS, STAGES, THEORIES
Periodic, natural loss of consciousness.
SLEEP
A sequence of images, emotions, and thoughts passing through a sleeping person’s mind.
DREAMS
Diminished sensitivity as a consequence of constant stimulation.
SENSORY ADAPTATION
Eye’s clear protective outer layer, covering the pupil and iris, bends lights to help provide focus.
CORNEA
ENDORPHINS
Large, slow brain waves associated with deep sleep of NREM-3
DELTA WAVES
Recurring problems in falling or staying asleep.
INSOMNIA
Process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events as meaningful.
PERCEPTION
Amount of energy in a light wave or sound wave, which influences what we perceive as brightness or loudness.
INTENSITY
Theory that the spinal cord contains a neurological “gate” that blocks pain signals or allows them to pass on to the brain.
GATE-CONTROL THEORY
Our biological clock. Regular bodily rhythms that occur on a 24 hour cycle.
CIRCADIAN RHYTHM
Sleep disorder characterized by uncontrollable sleep attacks. May lapse into REM sleep at inopportune times. Treated with frequent naps and medication.
NARCOLEPSY
Principle that to be perceived as different, two stimuli must differ by a constant minimum percentage.
WEBER'S LAW
What main nerve connects the eye to the brain?
OPTIC NERVE
Principle that one sense may influence another. (when the smell of food influences its taste)
SENSORY INTERACTION
Processing many aspects of a problem simultaneously. Generally used to process well learned information or to solve a problem.
PARALLEL PROCESSING
Underlying meaning of a dream. (what Freud studied)
LATENT CONTENT OF DREAMS
Information processing guided by higher-level mental processes, as when we construct perceptions from our experience and expectations.
TOP-DOWN PROCESSES
Best explains how we sense low pitches.
FREQUENCY THEORY
Our sense of body movement and position and enables our sense of balance.
VESTIBULAR SENSE
in a 7-8 hour night of sleep, how many sleep cycles does a person go through?
4-5
A sleep disorder in which normal REM paralysis does not occur. Instead, twitching, talking, or even kicking or punching may occur, often acting out one’s dreams.
REM SLEEP BEHAVIOR DISORDER
Theory predicting how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise).
SIGNAL DETECTION THEORY
Less common form of hearing loss, caused by damage to the mechanical system that conducts sound waves to the cochlea.
CONDUCTIVE HEARING LOSS
FOUR PRIMARY SKIN SENSATIONS.
1. PRESSURE
2. WARMTH
3. COLD
4. PAIN