This week I've found the consciousness chapter very interesting,
especially sleeping patterns. I never realized there are steps
in the sleeping process. There are five stages in the sleeping
cycle. Stages one through four include non-REM sleep, and stage
five is the REM sleep cycle. Different brain waves occur in each
level of sleep. While a person is still awake the brain produces
beta waves, these waves are produced during alert states only,
and occur thirteen plus times per second. Alpha waves arise
eight to twelve times per second and are produced in calm
wakefulness. Theta waves occur four to seven times per second.
Both Alpha waves and Theta waves take place during stage one of
sleep. During stage two, waves are absent, but electrical
activity happens instead. Sleep spindles and K-complexes appear
during this time. Delta waves appear twenty to fifty percent of
the time in stages three and four. During REM sleep, there are
low-amplitude waves resembling those of wakefulness. This is
also when dreams take