...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The European journal of neuroscience. >Noise in the brain: Transcranial random noise stimulation and perceptual noise act on a stochastic resonance‐like mechanism
【24h】

Noise in the brain: Transcranial random noise stimulation and perceptual noise act on a stochastic resonance‐like mechanism

机译：Noise in the brain: Transcranial random noise stimulation and perceptual noise act on a stochastic resonance‐like mechanism

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

摘要

Abstract Stochastic resonance (SR) is a phenomenon in which a certain amount of random noise added to a weak subthreshold stimulus can enhance signal detectability. It is unknown how external noise interacts with neural noise in producing an SR‐like phenomenon and whether this interaction results in a modulation of either network efficiency or the efficiency of single neurons. Using random dot motion stimuli and noninvasive brain stimulation, we attempted to unveil the specific mechanism of action of the SR‐like phenomenon in motion perception, if present. We aimed to determine whether signal integration efficiency changes with external noise (random dot numerosity) and how electrical transcranial random noise stimulation (tRNS) can affect the peak performance. The participants performed a coherent motion detection task in which the random dot numerosity varied, whereas the signal‐to‐noise ratio (SNR) remained constant. We applied placebo or tRNS with an amplitude of either 1 or 2?mA during task execution. We found peaks in participants' performance both in the case of placebo stimulation and in the case of 1‐mA tRNS. In the latter case (i.e., with an additional noise source), the peak emerged at lower random dot numerosity levels than when no additional noise was added (placebo). No clear peak was observed with 2‐mA tRNS. An equivalent noise (EN) analysis confirmed that SR arises from a modulation of the network efficiency underlying motion signal integration. These results indicate a joint contribution of external and neural noise (modulated by tRNS) in eliciting an SR‐like phenomenon.

著录项

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