[The effect of an extra-stimulus on successive inhibition following differentiations]

The influence of a foreign stimulus on the aftereffect of inhibitory stimuli was studied in experiments on dogs with salivary conditioned reflexes. The dynamics of temperature changes in the parotid salivary gland was used as an indicator since the action of a differentiation stimulus was accompanied by a drop in its temperature; each differentiation, whether rough, medium or fine--had its own limit of the gland's temperature drop during intensification of differentiation inhibition. It has been found that the dynamics of the gland temperature changes in the trace pauses and in response to a foreign stimulus depends on the modality of the stimulus, the duration of its action in the experiment, the typological properties of the animal's nervous system and the fineness of differentiation.