• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Computer Methods and Programs in Biomedicine: An International Journal Devoted to the Development, Implementation and Exchange of Computing Methodology and Software Systems in Biomedical Research and Medical Practice >Direct effects of audio-visual stimulation on EEG.
【24h】

Direct effects of audio-visual stimulation on EEG.

机译：视听刺激对脑电图的直接影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the course of 2 months, 25 repetitions of a 20 min audio-visual stimulation (AVS) program with stimulations at 17, 9, 4, and 2 Hz were applied to 6 volunteers. EEG data were recorded from 6 scalp locations prior, during and after AVS. In order to identify direct and transient changes in EEG under influence of AVS, total power, relative frequency band powers and magnitude-squared coherences were estimated. Intense brain wave entrainment as a direct reaction to AVS was significant through increase of spectral powers and coherences around the stimulating frequency bands in the occipital areas, spreading also to the central and frontal regions. However, these excitations were 'short-lived'. On the other hand some signs of interhemispheric cooperation (coherences in the narrow bands around 2, 4, and 17 Hz at parieto-occipital areas) remained increased during the investigated 3 min after AVS. As going through further AVS sessions the driving response progressively enhanced for 2 and 4 Hz stimulation in centro-parietal locations. Progress was also found in the left and right hemisphere synchronization examined by coherences. In perspective, the results contribute to deeper comprehension of photic stimulation approaches as a technique of guided entrainment of the brain waves or intermediate increase of hemispheres' synchronization.
机译：在2个月的过程中，对20名视听刺激（AVS）程序进行了25次重复，分别以17、9、4和2 Hz的刺激进行了测试。在AVS之前，期间和之后，从6个头皮位置记录了脑电数据。为了确定在AVS影响下脑电图的直接和瞬时变化，估算了总功率，相对频带功率和幅度平方相干性。通过增加枕骨区刺激频带周围的频谱功率和相干性，强烈的脑波夹带是对AVS的直接反应，因此很重要，并且还扩散到中央和额叶区域。但是，这些激发是“短暂的”。另一方面，在AVS后3分钟的研究中，半球间合作的一些迹象（在顶枕区的2、4和17 Hz附近的窄带中的相干性）仍然增加。随着进一步的AVS会话的进行，在顶顶中心位置2和4 Hz刺激下，驾驶响应逐渐增强。通过相干性检查，在左右半球同步中也发现了进展。从角度上讲，这些结果有助于对光刺激方法的深入理解，这是一种引导性夹带脑电波或半球同步性中间增加的技术。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号