Cortical Activation Accompanying Mastication, Swallowing, and Motor Imagery : Spectral Analysis of Electroencephalogram

采用脑电频谱分析方法，研究咀嚼、吞咽及咀嚼、吞咽等运动表象对大脑皮质活动的影响。使用19通道EEG系统(SYNAFIT 2500，NEC公司)记录EEG。大脑皮质激活伴随咀嚼：从脑电地形图的角度来看，咀嚼引起的大脑激活可以表现为放松的清醒状态和一些强烈的精神活动，食物的摄入量可能与准备咀嚼行为的精神强度有关。皮质激活伴随咀嚼持续时间：基于脑电频谱的地形图特征，大脑激活可能受到咀嚼持续时间的影响，例如，theta波和/或Delta波的出现。皮质激活伴随着食物硬度对咀嚼的影响：皮质激活可能受到食物质地的影响，如由APEA…表示的硬度α波和β波的频率增加，而theta波和/或Delta波消失。皮质激活伴随咀嚼成像：咀嚼成像显示的大脑激活可描述为典型的放松觉醒，根据脑电频谱，额叶皮质区域没有强烈的精神活动。皮质激活伴吞咽：吞咽前后脑电频谱因子比较，吞咽后脑电β1、β2和Delta波显著增加。因此，根据脑电地形图的特点，可以认为吞咽引起的皮质激活可以被描述为强烈的精神活动。伴随吞咽图像的皮质激活：根据脑电地形图的特点，与吞咽图像相一致的大脑激活可以被描述为典型的放松清醒而没有剧烈精神活动的情况。咀嚼对TMDs皮质激活的影响：TMDs缺乏正常受试者额区α、β波因子升高和theta波因子降低所表现出的皮质激活。以上结果提示，从咀嚼、吞咽和咀嚼、吞咽的运动表象来看，TMDs患者的脑电频谱可能有进一步的改变。较少

The cortical activity was investigated using spectral analysis of electroencephalogram (EEG) to clarify the cortical activation accompanying mastication, swallowing, and motor imagery of mastication and swallowing. The EEG was recorded using a 19-channel EEG system (SYNAFIT 2500, NEC Co).1. Cortical activation accompanying mastication : brain activation by mastication could be expressed as the relaxed wakefulness with some intense mental activity from the topographical aspects of EEG spectrum, also food intake could be related to the mental intense for the preparation of masticatory performance.2. Cortical activation accompanying masticatory duration : brain activation could be affected by the duration of mastication based on the topographical aspects of EEG spectra, such as the appearance of theta and/or delta waves.3. Cortical activation accompanying food hardness on mastication : cortical activation could be affected by food textures such as hardness, which is expressed by the appea … More rances of alpha and beta waves and disappearance of theta and/or delta wave.4. Cortical activation accompanying masticatory imagery : brain activation shown by masticatory imagery could be described as typical relaxed wakefulness without intense mental activity in the frontal cortex area based on EEG spectra.5. Cortical activation accompanying swallowing : in comparing spectral wave factors of EEG between pre- and post- swallowing, the beta 1, the beta 2, and delta waves were significantly increased in the post-swallowing phase. Therefore, it is assumed that cortical activation by swallowing could be described as intense mental activity based on the topographical aspects of EEG spectra.6. Cortical activation accompanying swallowing imagery : brain activation in accordance with swallowing imagery could be described as typical of relaxed wakefulness without intense mental activity based on the topographical aspects of EEG spectra.7. The effect of mastication to cortical activation in TMDs : TMDs lack the cortical activation shown by the increases in alpha and beta wave factors and decrease in theta wave factor which presented in the frontal area of normal subjects. This may be related to modification of masticatory motor behaviors.From the above results, it is concluded that EEG spectra could be indicated peculiar topographical findings according to the aspects of mastication, swallowing and motor imagery of mastication and swallowing, and further modification of EEG spectra could be indicated in TMDs. Less