The technique for recording the electrical activity from different parts of the brain and converting it into a tracing is known as
electrocardiogram (ECG)
electrocardiograph
electroencephalogram (EEG)
(electrocardiogram (ECG)) or (electroencephalogram (EEG))
ISN'T IT IS CALLED ECG RATHER THAN EEG? IF NIT THEN WHAT IS THE DIFFERENCE BTW THE TWO