...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Neurophysiology >Neural coding and perception of auditory motion direction based on interaural time differences
【24h】

Neural coding and perception of auditory motion direction based on interaural time differences

机译：基于腔室差异的神经编码与听觉运动方向的感知

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

While motion is important for parsing a complex auditory scene into perceptual objects, how it is encoded in the auditory system is unclear. Perceptual studies suggest that the ability to identify the direction of motion is limited by the duration of the moving sound, yet we can detect changes in interaural differences at even shorter durations. To understand the source of these distinct temporal limits, we recorded from single units in the inferior colliculus (IC) of unanesthetized rabbits in response to noise stimuli containing a brief segment with linearly time-varying interaural time difference ("ITD sweep") temporally embedded in interaurally uncorrelated noise. We also tested the ability of human listeners to either detect the ITD sweeps or identify the motion direction. Using a point-process model to separate the contributions of stimulus dependence and spiking history to single-neuron responses, we found that the neurons respond primarily by following the instantaneous ITD rather than exhibiting true direction selectivity. Furthermore, using an optimal classifier to decode the single-neuron responses, we found that neural threshold durations of ITD sweeps for both direction identification and detection overlapped with human threshold durations even though the average response of the neurons could track the instantaneous ITD beyond psychophysical limits. Our results suggest that the IC does not explicitly encode motion direction, but internal neural noise may limit the speed at which we can identify the direction of motion.
机译：虽然运动对于将复杂的听觉场景解析为感知对象是重要的，但在听觉系统中如何编码是不清楚的。感知研究表明，识别运动方向的能力受到移动声音的持续时间的限制，但我们可以在较短的持续时间内检测互连差异的变化。为了了解这些不同的时间限制的来源，我们在未抑制的噪声刺激的噪声刺激上从单位单位记录，响应于含有线性时变的内部时间差（“ITD扫描”）在时间嵌入的短暂段的噪声刺激在内部不相关的噪音中。我们还测试了人类听众检测ITD扫描或识别运动方向的能力。使用点流程模型将刺激依赖性和尖峰史的贡献分离为单神经元反应，我们发现神经元主要通过沿瞬时ITD响应而不是表现出真正的选择性。此外，使用最佳分类器来解码单神经元响应，我们发现ITD的神经阈值持续时间扫描，即使神经元的平均响应可以跟踪超出心理物理限制的平均响应，它也会与人阈值持续重叠的方向识别和检测。 。我们的结果表明，IC没有明确编码运动方向，但内部神经噪声可能会限制我们可以识别运动方向的速度。

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