Magnetoencephalographic Responses to Odor and Air by Fast Fourier Transformation Analysis in Human

磁共振成像（MEG）对odor （氨-乙酸酯）和空气刺激在74个烟囱SQUID系统中记录1秒（Magnesy D1 TM y D1， Bti Co.）并通过快速傅立叶转换分析进行评估。所发生的事情：1。关于MEG分析，在左中半区域的7 Hz频率上的光谱密度增加明显大于对噪音的反应，对空气刺激的反应。在对odor的反应中，这一大幅度增加了对odor感知机制在轨道前沿区域的存在，是一个畸形系统的主要中心。两个增加和减少的光谱区域都在一个频率的8赫兹以上观察到了正确的半球，当没有刺激与空气相比较时，没有刺激与odor相比较时。这种变化可能会反映出一个由刺激引起的高水平的振动。当没有刺激与空气刺激相比较时，在11赫兹的频率上有显著的光谱增加。类似的趋势在11和12赫兹频率上观察到，当没有刺激与odor相比较时。这些发现增加了对odor和空气的随机呈现的关注水平。在21和22赫兹的对比半球中，21赫兹和22赫兹频率出现了显著差异，当没有刺激与空气比较时，没有刺激与odor比较时。这些差异明显地引起了对空气和成人的反应的反应。左半球在14 - 17赫兹和23 - 14赫兹之间频率的MEG光谱密度的替代品被注意到，当没有刺激与空气比较时，没有刺激与odor比较。These results appear to be related to the“emotions”of pleasantness and unpleasantness evoked by air and odor。

Magnetoencephalographic (MEG) responses to odor (amyl-acetate) and air stimuli for 1 second were recorded in humans with a 74-chennel SQUID system (MagnesィイD1TMィエD1, Bti Co.) and evaluated by fast Fourier transformation analysis. The following were obtained :1. On MEG analysis, the spectral density increase in the left mid-central region at a frequency of 7 Hz was significantly greater in response to odor than in response to air stimuli. This greater increase in response to odor is apparently related to the presence of the odor perception mechanism in the orbital frontal area, a major center of the olfactory system.2. Both increased and decreased spectral areas at a frequency of 8 Hz were observed over the right hemisphere when no stimulus was compared with air and no stimulus was compared with odor. The changes may reflect a high level of vigilance caused by stimulation.3. When no stimulus was compared with air stimulation, a significant spectral increase at a frequency of 11 Hz was noted. Similar trends were observed at frequencies of 11 and 12 Hz when no stimulus was compared with odor. These findings an increased level of attention in response to random presentation of odor and air.4. Significant differences at frequencies of 21 and 22 Hz were noted in the contralateral hemisphere when no stimulus was compared with air and no stimulus was compared with odor. These differences apparently arise the responses of the somato-sensory cortex to air and odor.5. Alternation of MEG spectral densities at frequencies from 14 to 17 Hz and from 23 to 14 Hz in the left hemisphere was noted when no stimulus was compared with air and no stimulus was compared with odor. These results appear to be related to the "emotions" of pleasantness and unpleasantness evoked by air and odor.