Differential response properties of peripherally and cortically evoked swallows by electrical stimulation in anesthetized rats

Brain Research Bulletin
Takanori TsujimuraMakoto Inoue

Abstract

We compared onset latency, motor-response patterns, and the effect of electrical stimulation of the cortical masticatory area between peripherally and cortically evoked swallows by electrical stimulation in anesthetized rats. The number of swallows and the motor patterns were determined using electromyographic recordings from the thyrohyoid, digastric, and masseter muscles. The onset latency of the first swallow evoked by electrical stimulation of the cortical swallowing area (Cx) was significantly longer than that evoked by stimulation of the superior laryngeal nerve (SLN). The duration of thyrohyoid burst activity associated with SLN-evoked swallows was significantly longer than that associated with either Cx-evoked or spontaneous swallows. Combining Cx with SLN stimulation increased the number of swallows at low levels of SLN stimulation. Finally, A-area (the orofacial motor cortex) stimulation inhibited Cx-evoked swallows significantly more than it inhibited SLN-evoked swallows. These findings suggest that peripherally and cortically evoked swallows have different response properties and are affected differently by the mastication network.

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Citations

Apr 12, 2016·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·J MagaraS Hamdy
Mar 4, 2017·American Journal of Physiology. Gastrointestinal and Liver Physiology·Takanori TsujimuraMakoto Inoue
Aug 7, 2020·American Journal of Physiology. Gastrointestinal and Liver Physiology·Midori YoshiharaMakoto Inoue
Aug 28, 2018·Current Physical Medicine and Rehabilitation Reports·Kensuke YamamuraKeiichiro Okamoto
Jan 24, 2018·Journal of Applied Physiology·Takanori TsujimuraMakoto Inoue
Apr 1, 2020·Journal of Oral Science·Takanori Tsujimura, Makoto Inoue
Sep 4, 2020·American Journal of Physiology. Gastrointestinal and Liver Physiology·Kojun TsujiMakoto Inoue
Jul 31, 2021·Frontiers in Physiology·Naohito HaoMakoto Inoue

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