An amplified recording of the waves of electrical activity that sweep across the surface of the brain is called a(n):

An amplified recording of the waves of electrical activity that sweep across the surface of the brain is called a(n):(EEG) electroencephalogram

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An amplified recording of the waves of electrical activity that sweep across the surface of the brains is called an EEG

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but there is no

i guess you forgot putting it.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves