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Published on: July 12, 2012
Brain activity and human unilateral chewing: an FMRI study
A Quintero1, E Ichesco, C Myers
1Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
Journal of Dental Research
|October 30, 2012
Summary
This study used functional magnetic resonance imaging (fMRI) to reveal brain activity during human chewing. Key brain regions like the cerebellum and motor cortex showed dynamic changes in activation patterns during chewing sequences.
Area of Science:
- Neuroscience
- Human motor control
Background:
- Mastication brain mechanisms are well-studied in animals, but less so in humans.
- Understanding human chewing control is crucial for various neurological and rehabilitation applications.
Purpose of the Study:
- To investigate human brain activity patterns during mastication using functional magnetic resonance imaging (fMRI).
- To identify specific brain regions involved in initiating and concluding chewing sequences.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to monitor brain activity in human participants during gum chewing.
- Chew blocks were divided into five 5-second segments to analyze dynamic changes in brain activation over time.
Main Results:
- Chewing activated distinct brain areas including the cerebellum, motor cortex, caudate, cingulate, and brainstem.
- Unique activation clusters were observed in the initial segment, suggesting regions for chewing initiation.
- Distinct activations in the final segment indicated brain areas involved in anticipatory or terminal motor events.
Conclusions:
- This research provides evidence for specific human brain areas engaged during mastication.
- Brain activation patterns during chewing are dynamic and change throughout the sequence.
