The three following cases are instances of a peculiar sweat reflex which does not seem to have been recorded in the literature. The fact that the last two were brought to notice shortly after the first was seen, however, would argue that the condition is not as uncommon as would appear from the lack of records.
In all three cases the sweating is confined to certain definite facial areas and follows, rather quickly, the ingestion, or even the smelling, of certain pungent articles of diet. The reflex involved apparently includes, on the afferent side, the olfactory nerves (possibly, also, to a lesser extent, the gustatory) and, on the efferent side, the secretory fibers of the sweat glands of the face, which are distributed with the seventh cranial nerve.
Why the sweating should be so sharply localized and invariably confined to the same areas, and why certain stimuli and those only