States Of Alertness Flashcards
With an EEG, when a person was awake but relaxed, the waves were smooth and regular, with about 10 wave peaks for second. They call these waves ______waves.
Alpha waves
When a person open his or her eyes and focused attention on something, that is, was awake and alert, the Waves became faster and a regular and were called ____
Beta waves
Slower waves are associated with
Greater relaxation
The waves recorded on the tracings got progressively slower, lower in ____ larger, higher in ____ during the first hour or so after the person fell asleep
Frequency, amplitude
Stage ____ is considered a transition from wakefulness into sleep
1
Stage 2 is marked by the appearance of brief bursts of rapid brain activity called ___ in the midst of the overall slowing of the EEG waves. At this point the person is truly asleep
Sleep spindles
Stages ___ and ____ considered
3 and 4, Deep sleep
Stage III is marked by the appearance of low-frequency high amplitude waves called ____ which make up 10% to 50% at the tracings at this stage
Delta waves
During stage ___the deepest stage of sleep , the tracings consist almost entirely of delta waves
4
_____ is the first letter in the Greek alphabet, ____ is the second, ___ is the fourth
Alpha, beta, delta
After a person passes through stage two The EEG tracings become fast and a irregular, similar to the pattern of alert wakefulness. But the person is still sound asleep in a new sleep stage Marked By almost complete muscle relaxation except for the eye muscles which are active. This stage of sleep is called rapid eye movement sleep or
REM sleep
Transition into sleep
Stage one
Beginning of slow wave sleep, marked by burst of activity called sleep spindles
Stage 2
Marked by appearance of very large, very slow waves called delta waves
Stage three
Mostly delta waves
Stage 4
