electroencephalogram:-
recording of the electrical activities occuring in the brain using electrode which are placed in thhe skull is called as encephalogram.
-4 different types of waves -in normal condition.
i)alpha waves-awake,closed eyes.
ii)beta waves-awake alert ,opened eye
iii)gamma wave:-drowsy,about to fall to sleep.
iv)delta waves-deep sleep
significance:-
i)it is the reliable method to find the electrical changes occuring in the brain and neurological condition.
ii)diagnosis of epilepsy
iii)helpful locate abcess or tumor.
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