Flashcards in Consciousness Deck (13):
The brainstem controls...
alertness and arousal
What is the reticular formation?
a set of interconnected nuclei that are located throughout the brain stem that control alertness and arousal
measures physiological processes during sleep.
includes the following:
measures the electrical impulses in the brain
measures of skeletal muscle movements
measures of eye movement
In a relaxed state, the EEG will show...
alpha waves (low amplitudes and high frequencies)
Stage 1 Sleep
EEG - theta waves
EOG - slow rolling eye movements
EMG - moderate activity
Stage 2 Sleep
EEG - theta waves with K complexes and sleep spindles EOG - no eye movement
EMG - moderate activity, low heart rate, respiration and temperature
Stage 3 and 4
Characterized by delta waves (high amplitude, low frequency waves (.5-3 Hz) ; as stage 3(has some higher frequency waves) turns to stage 4, delta waves begin to dominate
Final Stage - REM Sleep
EEG- measures waves that resmeble beta waves (which are given off when someone is awake) but more jagged
EOG - bursts of quick eye movements
EMG - no skeletal muscle movement
REM is also called paradoxical sleep (body no move, but EEG gives off appearance of someone being awake)
1) Sleep may have serves as a survival mechanism to reduce nighttime activity; 2) sleep heals the body by restoring tissue; 3) Sleep plays role in growth (pituitary gland releases growth hormone)