Bioimpacts. 2019;9(3):191-194.
doi: 10.15171/bi.2019.23
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Short Communication

Manifestation of hemispheric laterality in chewing side preference and handedness


Introduction: Humans possess a behavioral inclination towards more utility of one side of the body, in relation to the dominant hemisphere of the brain. The current investigation assesses handedness together with a chewing preference which has not been evaluated in various food textures before. Methods: Nineteen young and healthy volunteers chewed hard (walnut) and soft (cake) foods, during surface electromyography recording from masseter muscles. The side of the first and all chews in the two food types were determined and compared with the side of the dominant hand. Results: Our findings indicated the two lateralities in the same side considerably (60 to 70%), implying the solidarity in the control of the dominant hemisphere of the brain. The unilaterality was more prominent in the assessment of all chews in hard food, with higher statistical agreement and correlation. Conclusion: Thereupon masticatory preference is found, with probable origins in the dominant hemisphere of the brain.
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Submitted: 05 May 2018
Revised: 03 Nov 2018
Accepted: 11 Nov 2018
First published online: 15 Apr 2019
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