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Sleep

Sleep involves rest of two things. Body (10%) and Brain (90%). The body is least involved in rest. The quality of sleep is very important than Quantity of sleep. (5 hrs is essential). We sleep in four cycles. Per cycle 100 minutes. Beta frequency is the first one which is also known as the Awakening cycle which is from 13 to 30 Hz. Then comes Alpha frequency which is 8-12 Hz which is also known as the REM (Random Eye Movement). Then comes Theta frequency which is for 5-8 Hz. Lastly Delta frequency for 2-4 Hz.

Only delta frequency gives brain full deep rest. Angryness increases the frequency of a person. So, to calm that body takes time that's why we sleep late. So, a person should not fight or be angry before sleeping to get a good quality sleep. ECG ( electrocardiogram) measures heart frequency. EOG (Electrooculogram) measures eye frequency. EMG (Electromyogram) measure muscles frequency. EEG ( electroencephalogram) measures brain frequency.


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