Final answer:
During deep slow wave sleep, or NREM stage 3 sleep, an EEG typically shows a high amplitude delta rhythm, signifying the deepest phase of sleep. Alpha and theta activities are associated with the lighter stages of sleep, while REM sleep resembles wakefulness in brainwave frequencies but includes rapid eye motions and muscle paralysis.
Step-by-step explanation:
During deep slow wave sleep, also known as NREM stage 3 sleep, our EEG shows high amplitude delta rhythm. These delta waves are characterized by a low frequency, typically less than 3 Hz, and represent the deepest phase of sleep. In this stage, the body's heart rate and respiration slow down significantly, and it is challenging to awaken someone.
The appearance of alpha activity is seen in the transition into stage 1 sleep and is characterized by a frequency of 8-12 Hz with relatively low amplitude. Theta waves, with a frequency of 4-7 Hz and higher amplitude than alpha waves, are characteristic of the end of stage 1 and during stage 2 sleep, with sleep spindles and K-complexes as additional markers. REM sleep, in contrast to slow-wave sleep, exhibits brain waves with frequencies similar to wakefulness but is distinct due to the rapid eye movements and muscle paralysis that occur.