Sentence:  The emotional states produced by drugs influence the cortical potentials in a characteristic manner ; synchrony prevails in the <WSD>EEG</WSD> of the experimental animal after administration of tranquilizers , but asynchrony after application of analeptic and psychoactive drugs . 
Meaning of the word marked with <WSD> tags:  a graphical record of electrical activity of the brain; produced by an electroencephalograph