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目的:探讨吞咽时脑区激活情况及吞咽中枢环路的时空特性。方法:选择10名健康受试者，在磁屏蔽室内应用148通道全头型脑磁图系统采集受试者执行吞咽动作时的脑磁信号，利用CURRY8分析软件进行数据处理，定位算法采用基于最小模分析的低分辨率电磁成像方法(LORETA)，每300 ms作为一个独立分析阶段，以大脑皮层F-分布值(F-distributed)最高的位置为刺激反应区域，通过时间和空间定位，对执行吞咽动作时激活区域进行分析。结果:在执行吞咽动作时，中央旁小叶、中央前回、延髓、中央后回、额下回、顶上小叶、角回、胼胝体、额中回、扣带回、眶回、丘脑、三脑室底部、放射冠、楔前叶、额岛叶、桥小脑角区、额上回、基底节等区域被激活，其中出现频次最高的前八位脑区为中央旁小叶、中央前回、胼胝体、中央后回、顶上小叶、额中回、扣带回、基底节。10名受试者在执行吞咽动作时，有8名受试者在0～300 ms时脑磁信号以左侧大脑半球激活为主，301～600 ms时以双侧大脑半球激活或中间区域激活为主，601～900 ms以右侧大脑半球激活为主。1名受试者在0～300 ms时脑磁信号以右侧大脑半球激活为主，301～600 ms和601～900 ms以左侧大脑半球激活为主。1名受试者在0～300 ms和601～900 ms时脑磁信号以右侧大脑半球激活为主，301～600 ms时以中间区域激活为主。结论:在执行吞咽动作时，早期呈现左侧偏侧性，后期呈现右侧偏侧性，存在高度的时间依赖关系，可能存在以中央区为核心的中央区-胼胝体-顶上小叶-额中回-扣带回-基底节相关的吞咽中枢环路。“,”Objective:To observe the activation of cerebral regions during swallowing by magnetoencephalography (MEG), and discuss the temporal and spatial characteristics of neural circuit.Methods:Ten healthy subjects were selected, and the magnetic signals of their brains were recorded using 148 channel full head type MEG system in the magnetic shielding room.Data were analyzed using CURRY8 analysis software and the localization algorithm was based on minimum modulus low resolution electromagnetic imaging method (LORETA). Every 300 ms data were set as an independent analysis stage and made the highest position of the cerebral cortex F-distribution values (F-distributed) as the activation area.The activation areas were analyzed during swallowing through time and space location.Results:Paracentral lobule, anterior central gyrus, medulla oblata, posterior central gyrus, inferior frontal gyrus, parietal lobules, angular gyrus, corpus callosum, middle frontal gyrus, cingulate gyrus, orbital gyrus, thalamus, bottom of third ventricle, corona radiata, precuneus, frontal insula, cerebellopontine angle, superior frontal gyrus and basal ganglia area were activated during swallowing, in which the top eight brain regions were paracentral lobule, anterior central gyrus, corpus callosum, posterior central gyrus, superior parietal lobule, middle frontal gyrus, cingulate gyrus, and basal ganglia.When the 10 subjects performed the deglutition, MEG signals of 8 subjects were mainly activated by the left cerebral hemisphere at 0-300 ms, the bilateral cerebral hemisphere or intermediate region at 301-600 ms, and the right cerebral hemisphere at 601-900 ms.MEG signal of 1 subject was activated by the right cerebral hemisphere at 0-300 ms, and the left cerebral hemisphere at 301-600 ms and 601-900 ms.MEG signal of 1 subject was mainly activated by the right cerebral hemisphere at 0-300 ms and 601-900 ms, and in the intermediate region at 301-600 ms.Conclusion:During swallowing the MEG signals appeared left laterality in the early stage and right laterality in the later stage, and showed a close correlation with time.There may be a swallowing neural circuit composed by the central region, corpus callosum, superior parietal lobule, middle frontal gyrus, cingulate gyrus and basal ganglia, in which the central region is the core.