Answer:
theta waves with sleep spindles and K-complexes
Explanation:
K-complexes and sleep kindles are known to be defining brainwaves of stage 2 REM or sleep. Duke has not entered the deep sleep stage or the slow wave sleep stage which are characterized by low frequency and high delta waves. While K-waves are large theta waves that usually occur in response to stimulus such as sound, and hence Duke must have been awakened by the sound of the door.
Answer:
âtheta waves with sleep spindles and K-complexes
Explanation:
theta waves occurs in stage 1 sleep, higher amplitude, frequency slowing down, more synchronized (firing at same time) 3-7 cycles per second.
Sleep spindle is a high frequency activity appearing on EEG that last for about 1 second, indicating person is truly asleep.
K-complexes are lower frequency higher amplitudes occur, due to picking up on external stimuli.
