Our brain operates mainly on 5 brain waves, those waves are generated by the impulses of the brain cells ( neurons) as they are commincating and exchanging information through signaling.
The description for each one is somehow clear in the photo attached, however our main focus now is on alpha brain waves...we get ourselves in the state when we are meditating, and we should get into it when we are praying.
In this state we operate our brains on frequencies from 7-13 hz, in this state our bodies boost the immune system, this state notmalize the blood pressure, the pulse rate.
Many yogis and through continous training and meditation get easily into theta state, where we operate out brains on 4-7 hz, at this level they become in control of their autonomic nervous systems...and miracles start to happen...
Remember...breathe and meditate and go into your body, get to know your body, talk to your organs and make peace with them.