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Brain State-dependent Brain Stimulation with Real-time Electroencephalography-Triggered Transcranial Magnetic Stimulation
Published on: August 20, 2019
Analysis of brain activity immediately before conscious teeth clenching using magnetoencephalographic method
T Iida1, P B C Fenwick, A A Ioannides
1Clinical Pathology, Nihon University Graduate School of Dentistry at Matsudo, Matsudo, Chiba, Japan. iida.takashi96@nihon-u.ac.jp
Journal of Oral Rehabilitation
|June 15, 2007
Summary
Unconscious teeth clenching origins remain unclear. This study used magnetoencephalography (MEG) to reveal brain activity patterns preceding clenching, identifying motor cortex involvement starting 200 ms prior.
Area of Science:
- Neuroscience
- Human Physiology
Background:
- The neurological underpinnings of unconscious teeth clenching are not well understood.
- Clarifying pre-clench brain activity is crucial for understanding its human significance.
Purpose of the Study:
- To develop a magnetoencephalography (MEG) method for measuring brain activity preceding teeth clenching.
- To determine the temporal dynamics of brain activation immediately before voluntary teeth clenching.
Main Methods:
- Magnetoencephalography (MEG) signals were recorded from six subjects during a controlled clenching task.
- Head movement was restricted to less than 5 mm to ensure signal accuracy.
- Tomographic brain activity estimates and regional activation time courses were derived.
Main Results:
- Statistical maps revealed significant brain activity in motor, pre-motor, and somatosensory cortices preceding clenching.
- Activations were predominantly bilateral but showed a strong unilateral bias in most participants.
- The developed MEG method successfully measured pre-clench brain activity.
Conclusions:
- The study demonstrates the efficacy of the established MEG protocol for capturing pre-clench neural activity.
- Brain activity relevant to teeth clenching initiates at least 200 milliseconds before electromyogram onset.
- This research provides a foundation for further investigation into the neural basis of teeth clenching.
