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In Tracy's words, "These are white spots observable on the arms, the back of the hands, or the face. The spots are chronic in location. They are evidently caused by vasoconstriction." In another place he summarizes the objective phenomena, a majority of which are found constantly in chronic epilepsy, as follows: "(1) Unbalancement of the vasoconstriction reflexes on opposite sides of the body. Normally these reflexes balance, are equal. The unbalancement may be in the time taken for the reflexes to appear (that is, a difference in the reaction times) or it may be a difference in the color of the reactions. (2) A hypertonia of sympathetic fibers (manifested by the intensity in color of the reflex vasoconstriction or by the reflex appearing sooner than is normal). (3) A patchy reflex vasoconstriction, or an absence of the reflex (perhaps due to a degeneration of sympathetic fibers, one of the conditions
The White Spots of Epilepsy. Arch NeurPsych. 1927;17(6):869. doi:10.1001/archneurpsyc.1927.02200360149016
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