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

采用脑电图（EEG）频谱分析研究皮层活动，以阐明伴随咀嚼、吞咽以及咀嚼和吞咽运动意象的皮层激活。脑电图记录采用19通道脑电图系统（SYNAFIT 2500， NEC公司）1。伴随咀嚼的皮质激活：脑电波谱的地形表现为放松的清醒状态，伴有一定强度的心理活动，食物摄入也可能与准备咀嚼行为的心理强度有关。伴随咀嚼持续时间的皮质激活：基于脑电图频谱的地形特征，如θ波和/或δ波的出现，大脑激活可能受到咀嚼持续时间的影响。伴随食物硬度对咀嚼的皮层激活：皮层激活可能受到食物质地（如硬度）的影响，这通过出现更多的α波和β波以及θ波和/或δ波的消失来表达。伴随咀嚼意象的皮质激活：脑电谱显示咀嚼意象所表现的大脑激活为典型的放松清醒状态，额叶皮质区无强烈的心理活动。吞咽伴皮层激活：对比吞咽前后脑电图波谱因子，吞咽后期β 1、β 2、δ波明显增加。因此，根据脑电图的地形特征，可以认为吞咽引起的皮层激活可以被描述为强烈的心理活动。伴随吞咽意象的皮质激活：根据脑电图的地形特征，与吞咽意象相一致的大脑激活可以描述为典型的放松清醒状态，没有强烈的心理活动。tmd的影响咀嚼皮质激活:tmd缺乏皮质激活显示增加的α和β波下降因素和θ波因素提出了正常人的额区。这可能与咀嚼运动行为的改变有关。综上所述，脑电图可以根据咀嚼、吞咽和咀嚼、吞咽的运动意象等方面显示出特殊的地形特征，脑电图谱的进一步修改可以在颞下颌颞下颌关节中显示出来。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