ELICITATION OF THE "PSEUDOMOTOR CONTRACTURE" IN THE TONGUE BY INTRAMEDULLARY STIMULATION

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Abstract
It has long been known that stimulation of the lingual nerve containing chorda tympani fibers will produce a "pseudomotor contracture" of chronically denervated striated tongue muscle.1 This response is known as the Philipeaux-Vulpian-Heidenhain phenomenon and is considered to be physiologically identical with the Sherrington contracture as seen in denervated limb muscle, and with the Rogowicz phenomenon2 as observed in certain denervated facial muscles. The literature pertaining to these phenomena has been reviewed by Hinsey and Gasser3 Dale,4 Gasser5 and Bremer.6 Hinsey and Cutting7 demonstrated that the Sherrington response in the quadriceps and gastrocnemius muscles is produced by stimulation of postganglionic sympathetic fibers, not by stimulation of somatic motor or sensory fibers. Grant and Kirby8 produced a typical pseudomotor contracture in denervated tongue muscle of the cat by stimulation of the cervical portion of the sympathetic cord, the chorda tympani and the chorda-lingual

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