activity takes place when a person is wide awake.
Its frequency is 14 Hz per second and
brain waves occur when a person relaxes. The Alpha
rhythm is between 7.5 Hz to 13 brain waves per
is a slow activity, and is represented by a
frequency of 3.5 Hz to 7.5 Hz per
brain waves occur when the individual is sleeping.
Its rate of frequency is 1.5 to 4 cycles per