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

通过快速傅立叶变换分析人体对气味和空气的脑磁响应

• 批准号: 10671627
• 负责人: KATO Toshihiko
• 金额: $ 1.86万
• 依托单位: Fukuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10671627/
• 关键词: Magnetoencephalography; Odor; Fast Fourier transformation; Human

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.

磁脑摄影（MEG）对气味（氨基乙酸）和空气刺激的反应1秒钟在具有74个载体鱿鱼系统（Magnesie D1TMIE D1，BTI Co.）的人类中记录，并通过快速傅立叶变换分析进行了评估。获得以下内容：1。在MEG分析中，左中央区域的频谱密度在7 Hz的频率下的响应明显大于对空气刺激的响应。对气味的响应较大的增加显然与轨道额叶区域的气味感知机制的存在有关，这是嗅觉系统的主要中心。2。当没有与空气进行刺激并将没有刺激与气味进行比较时，在右半球的频率为8 Hz处的光谱面积增加和增加。这些变化可能反映出刺激引起的高度警惕。3。当没有将刺激与空气刺激进行比较时，请注意在11 Hz的频率下显着增加。当没有刺激与气味比较时，在11和12 Hz的频率下观察到了类似的趋势。这些发现响应气味和空气的随机呈现4。当未与空气进行刺激并将其与气味进行比较时，在对侧半球的21和22 Hz的频率上有显着差异。这些差异显然出现了索索斯感官皮质对空气和气味的反应。5。当没有将刺激与空气进行比较，没有将刺激与气味进行比较时，注意到频率为14至17 Hz的MEG光谱密度在左半球的23到14 Hz的交替。这些结果似乎与空气和气味引起的愉悦和不愉快的“情感”有关。