Dr. Kimiko Kawano, Researcher at Center for Information and Sciences in
Nippon Medical School, Tested the Effect of Zero Magnetic Bed by Measuring
|Reference Value of Brain Wave
Brain wave is electronically monitoring activity of brain neuron cell.
Wave profile is categorized by frequency and named by its character. It
is categorized as follows:
||2 to 4 Hz
||4 to 8 Hz
||8 to 13 Hz
||Awake with eyes closing (Mainly on the back of head)
||13 to 30 Hz
||Thinking (Each activated part)
Alpha wave is about 10Hz measured on the back of head and in the condition
when you close your eyes. If you are stressed or think too much, beta wave
is more observed and alpha wave becomes relatively weak. If you relax again,
it becomes strong again.
However, if you relax too much, you may become sleepy. Then, alpha wave
is getting weak and theta wave, which has lower frequency, becomes strong.
If you get into deep sleep, brain wave becomes much lower delta wave.
Two Subjects were Measured
In this test, theta wave and alpha wave are mapped and measured to analyze
the process from a relaxed condition to a sleep condition. Two subjects
relaxed after lying on the bed. And alpha wave of A-san on the forehead
A-san gradually became sleepy. Alpha wave of her, once it had been weak,
oscillated as it became strong on forehead than back of head, then on back
of head than forehead.
Alpha wave of B-san almost disappeared after sleeping on the bed for a while. Then he was in theta wave condition. Occasionally, alpha wave was observed: however, there was no shift to deep sleep. Probably, he could perceive surrounding environment.
Kimiko Kawano (Ph.D in Engineering)
Graduated from Rikkyo University, Department of Science, Faculty of Physics.
Joined physiology research group in Nippon Medical School and currently
belong the the Center for Information and Sciences in the university.
From the view of brain physiology, she is researching on the brain functions
of professional shogi player, professional athletes, as well as people
in aroma therapy, in meditation or treated by Qigong, by measuring brain