Module 8.2 Vocab Flashcards
(24 cards)
Alpha Waves
A steady series of brain waves at a frequency of 8 to 12 per second that are characteristic of relaxation
Basal Forebrain
Area anterior and dorsal to the hypothalamus; includes cell clusters that promotes wakefulness and sleep
Brain Death
Condition with no sign of brain activity and no response to any stimulus
Coma
An extended period of unconsciousness with a low level of brain activity
Insomnia
Inadequate sleep
K-complex
A sharp brain wave associated with temporary inhibition of neuronal firing
Locus Coeruleus
A small structure in the pons that emits bursts of impulses in response to meaningful events, especially those that produce. emotional arousal
Minimally Conscious State
Condition of decreased brain activity with occasional , brief periods of purposeful actions and limited speech comprehension
Narcolepsy
A condition characterized by frequent periods of sleepiness during the day
Night terrors
Experiences of intense anxiety from which a person awakens screaming in terror; more severe than a nightmare
Non-REM Sleep
Stages of sleep other than REM
Orexin or Hypocretin
Neurotransmitter that increase wakefulness and arousal
Paradoxical Sleep
Sleep that is deep in some ways and light in others
Periodic Limb Movement Disorder
A sleep disorder characterized by repeated involuntary movement of the legs and sometimes the arms
PGO Waves
A distinctive pattern of high amplitude electrical potentials that occur first in the pons, then in the lateral geniculate, then in the occipital cortex
Polysomnograph
A combination of EEG and eye movement records
Pontomesencephalon
Part of the reticular formation that contributes to cortical arousal
Rapid Eye Movement (REM) Sleep
Sleep stage with rapid eye movements, high brain activity, and relaxation of the large muscles
REM Behavior Disorder
A condition in which people move around vigorously during REM sleep
Reticular Formation
A structure that extends from the medulla into the forebrain; controls motor areas of the spinal cord and selectively increases arousal and attention in various forebrain areas
Sleep Apnea
Impaired ability to breathe while sleeping
Sleep Spindle
12 to 14 Hz brain waves in bursts that last at least half a second
Slow-wave Sleep
Sleep occupied by slow, large amplitude brain waves
Vegetative State
Condition in which someone has decreased brain activity and alternates between wakefulness and sleep but only shows limited responsiveness, such as increased heart rate in response to a painful stimulus
