REFLEX SWEATING can be classified broadly into three clearly recognizable categories: emotional, thermal, and gustatory. In this last category are several subgroupings ranging from postencephalitic and syringomyelia gustatory sweating, mentioned in most texts on neurology,1 to the morefamiliar auriculotemporal syndrome2-5 and other less-common entities, such as the crocodile tear syndrome,6,7 submental sweating,8 and postsympathectomy sweating.3,9
The auriculotemporal syndrome and most of the less-common entities mentioned above can be explained by the "aberrant regeneration theory" proposed by Ford6 and reexamined by Glaister et al.5 In these cases there is always a history of surgery, trauma, or suppurative infection which in some manner damages the nerve axons responsible for salivation and sweating. Subsequently, the regeneration of these axons is aberrant; in other words, the nerve supply to the salivary gland in part grows out to innervate the sweat gland, and vice versa. With this nerve
Mailander JC. Hereditary Gustatory Sweating. JAMA. 1967;201(3):203–204. doi:10.1001/jama.1967.03130030073022
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