DEVICE FOR RECORDING SKIN GALVANIC REACTIONS

摘要

The present invention relates to a method for eliminating interference due to artifacts of a subject's movement or having a non-biological origin, such as various electrical interference or noises generated by appliances. To this end, pulses of electrical current are recorded wherein said pulses are function of a phasic component of the derma electrical activity. The incoming time of the first time-derivative pulse is then determined using the logarithm of the numerical value of the current that is recorded at the moment when the value of a second derivative exceeds a threshold value. The shape of the pulse is further analyzed, and, when the parameters of this shape correspond to given criteria, said pulse is related to the phasic component pulses. When the parameters of this shape do not correspond to the given criteria, the pulse is related to the artifacts. The analysis of pulse shape may be performed using instruments or programs.