I can't sleep.
I watched a presentation on Brain Music Therapy on youtube. In one slide it was saying that our brain produces small amount of electrical activities which induces brain waves. Our brain waves are responding differently to different activities. We have 4 type of Brain Waves:
- Delta: 2 to 4 Hz during sleeping
- Theta: 4 to 8 during day dreaming
- Alpha: 8-12 when you are focused and relaxed, for example watching movie
- Beta: above 12 during high concentration, like doing math
What type of brain wave it is, when you can't focus on anything but you can't sleep either?? Zeta??