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Association between brain lateralization and mixing ability of chewing side
Seung-Min Lee1, Sewoong Oh1, Sung Jin Yu1
1Dental Research Institute, Pusan National University Dental Hospital, Yangsan, South Korea.
Journal of Dental Sciences
|March 22, 2019
Summary
Brain laterality, encompassing handedness and eyedness, correlates with chewing preference. However, this brain dominance does not impact mastication efficiency or mixing ability.
Area of Science:
- Neuroscience
- Dental Science
- Human Physiology
Background:
- Previous research suggests a link between functional dominance in different body parts.
- Understanding brain laterality's influence on oral functions is crucial.
Purpose of the Study:
- To investigate the relationship between brain laterality (handedness, footedness, earedness, eyedness) and chewing side preference.
- To determine if brain laterality affects mixing ability and mastication efficiency.
Main Methods:
- Fifty-four volunteers completed a brain laterality questionnaire and tasks.
- Chewing side preference was identified by gum location after chewing.
- Mixing Ability Index (MAI) and occlusal contact area were measured.
Main Results:
- A significant correlation was found between brain dominance and chewing preference side in 72% of volunteers.
- The occlusal contact area was significantly wider on the dominant side.
- No significant association was observed between brain dominance and MAI.
Conclusions:
- Brain laterality is positively correlated with chewing preference side.
- Mastication efficiency, as measured by MAI, does not differ between dominant and nondominant sides.
- Brain dominance influences chewing preference but not mastication efficiency.
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