Differential mastication kinematics of the rabbit in response to food and water: Implications for conditioned movement |
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Authors: | Keith?D?Huff Yukiko?Asaka Amy?L?Griffin William?P?Berg Matthew?A?Seager Email author" target="_blank">Stephen?D?BerryEmail author |
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Institution: | (1) Division of Neuroscience, Lilly Research Laboratories, 46285 Indianapolis, IN;(2) Department of Cellular and Molecular Physiology, Yale University School of Medicine, 06508 New Haven, CT;(3) Department of Psychology and Center for Neuroscience, Miami University, 45056 Oxford, OH;(4) Department of Physical Education, Health and Sport Studies, Miami University, 45056 Oxford, OH |
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Abstract: | Analysis of naturalistic chewing patterns may provide insight into mapping the neural substrates of jaw movement control systems,
including their adaptive modification during the classically conditioned jaw movement (CJM) paradigm. Here, New Zealand White
rabbits were administered food and water stimuli orally to evaluate the influence of stimulus consistency on masticatory pattern.
Chewing patterns were recorded via video camera and movements were analyzed by computerized image analysis. The mandibular
kinematics, specifically the extent of dorsal/ventral, medial/lateral, and rostral/caudal movement, were significantly larger
in food-evoked than water-evoked chewing. Water-evoked chewing frequency, however, was significantly higher than that of food-evoked
movements. In light of known cortical mastication modulatory centers, our findings implicate different neural substrates for
the responses to food and water stimuli in the rabbit. A detailed delineation of jaw movement patterns and circuitry is essential
to characterize the neural substrates of CJM. |
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Keywords: | rabbit kinematics jaw movement mastication classical conditioning |
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