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Diazepam in the management of epilepsy.

It has been previously reported that when Sn are stimulated with low level scalp positive current an elevation in mood and increased alertness occurs, and conversely, scalp negative current produces withdrawal and quietness. These data were derived from clinical observa tion. The purpose of this study was to quantify the effects of scalp positive and negative currents on the performance of a series of tasks. Eighteen normal Sn were used in a double blind repeated measures design. The Sn were tested on verbal learning, signal detection and reaction time tasks under two levels of current at positive and negative polarizations and a no current control condition. The levels of d.c. current used had no signifi cant effects upon the performance of these tasks, nor were any consistent patterns of general behaviour observed. These data suggest that the effects of d.c. current on objective perfor mance are negligible.