...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Brain Research >Stimulus intensity modifies saccadic reaction time and visual response latency in the superior colliculus
【24h】

Stimulus intensity modifies saccadic reaction time and visual response latency in the superior colliculus

机译：刺激强度可改变上丘的s声反应时间和视觉反应潜伏期

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

Performance in a reaction time task can be strongly influenced by the physical properties of the stimuli used (e.g., position and intensity). The reduction in reaction time observed with higher-intensity visual stimuli has been suggested to arise from reduced processing time along the visual pathway. If this hypothesis is correct, activity should be registered in neurons sooner for higher-intensity stimuli. We evaluated this hypothesis by measuring the onset of neural activity in the intermediate layers of the superior colliculus while monkeys generated saccades to high or low-intensity visual stimuli. When stimulus intensity was high, the response onset latency was significantly reduced compared to low-intensity stimuli. As a result, the minimum time for visually triggered saccades was reduced, accounting for the shorter saccadic reaction times (SRTs) observed following high-intensity stimuli. Our results establish a link between changes in neural activity related to stimulus intensity and changes to SRTs, which supports the hypothesis that shorter SRTs with higher-intensity stimuli are due to reduced processing time.
机译：反应时间任务中的表现可能会受到所用刺激物的物理特性（例如位置和强度）的强烈影响。有人提出，在高强度视觉刺激下观察到的反应时间的减少是由于沿视觉途径的加工时间减少所致。如果这个假设是正确的，则应针对更高强度的刺激尽早在神经元中记录活动。我们通过测量上丘中间层神经活动的发生来评估这一假设，而猴子则产生了对高强度或低强度视觉刺激的扫视。当刺激强度高时，与低强度刺激相比，反应开始潜伏期显着减少。结果，减少了视觉触发扫视的最短时间，这是由于在高强度刺激后观察到的扫视反应时间（SRT）较短。我们的结果在与刺激强度有关的神经活动变化与SRT改变之间建立了联系，这支持了具有较高强度刺激的较短SRT是由于减少了处理时间的假说。

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