Electromyographic analysis of oral habituation in rat pups

Physiology & Behavior
S E SwithersW G Hall

Abstract

Rat pups show decreases in mouthing activity in response to a series of repeated oral infusions of a diet. This decrease in mouthing activity has been termed "oral habituation" and these changes have been readily recorded with simple behavioral observations. Oral habituation appears to be a component of satiety in young rats. In the present study, to more specifically characterize changes in motor response topography during habituation in muscle groups used for mastication, mouthing activity was recorded by implanting fine wire electromyographic electrodes in the superficial masseter, anterior digastric, sternohyoideus, and genioglossus muscles of 12-day-old rat pups. During testing, pups received a series of brief oral infusions of a 10% sucrose diet delivered through an oral cannula. The results demonstrated that mouthing activity as observed and scored behaviorally was highly correlated with mouthing behavior recorded by EMG, with oral habituation distinctly emerging in both measures. In addition, the pattern of motor activity in the four masticatory muscles changed during the course of oral habituation. Within the minute following a single infusion, the cycle frequency, duration of activity, and relative onset time of activ...Continue Reading

References

May 1, 1975·Journal of Morphology·W A Weijs, R Dantuma
Aug 1, 1992·Behavioral Neuroscience·S E Swithers-Mulvey, W G Hall
Mar 1, 1992·Physiology & Behavior·S E Swithers-MulveyW G Hall
Aug 1, 1991·Appetite·S E Swithers-MulveyW G Hall
Jan 1, 1983·Archives of Oral Biology·N R Thomas, S C Peyton

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Citations

Nov 26, 2003·Appetite·Leonard H EpsteinFrances K McSweeney
Aug 4, 2009·Learning and Motivation·Leonard H EpsteinRachel Nadbrzuch
Oct 1, 2008·Brain Research·Teresa MoralesCaurnel Morgan
Feb 8, 2007·The American Journal of Clinical Nutrition·Jennifer L TempleLeonard H Epstein

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