Active sensing via movement shapes spatiotemporal patterns of sensory feedback
Active sensing via movement shapes spatiotemporal patterns of sensory feedback
复制标题
DOI：
10.1242/jeb.068007
复制
发表时间：
2012-05-01
影响因子：
2.8
通讯作者：
Fortune, Eric S.
中科院分区：
文献类型：
--
作者：
Stamper, Sarah A.;Roth, Eatai;Fortune, Eric S.
以前的研究表明，动物改变它们的运动行为，以增加感知量。然而，动物自身的运动也决定了感觉反馈的空间和时间动态。由于每种感觉模态都具有独特的时空特性，因此运动对每个感觉系统都有不同的和潜在的独立影响。在这里，我们表明，弱电鱼显着调整他们的运动行为的变化有关的特定模态的信息在一个任务中，增加感觉量是无关紧要的。我们通过改变照明（视觉）和传导性（电感受）来改变跟踪任务中的感觉信息。避难所运动刺激和鱼跟踪反应之间的增益在所有的感官条件下是功能相同的。然而，在黑暗中（没有视觉线索）跟踪误差显著增加。这是由于自发的全身振荡（0.1至1。由鱼产生的。这些运动是昂贵的：在黑暗中，鱼在跟踪时会游三倍多，产生更多的净正机械功。这些振荡的幅度增加的电感器的显着性是通过电导率的增加退化。此外，尾部弯曲（1.5至2.35。赫兹），据报道，这可以增强电感觉的感知，只发生在黑暗中的试验。这些数据表明，这两类运动-全身振荡和尾巴弯曲-积极形状的时空动态的电感反馈。
Previous work has shown that animals alter their locomotor behavior to increase sensing volumes. However, an animal's own movement also determines the spatial and temporal dynamics of sensory feedback. Because each sensory modality has unique spatiotemporal properties, movement has differential and potentially independent effects on each sensory system. Here we show that weakly electric fish dramatically adjust their locomotor behavior in relation to changes of modality-specific information in a task in which increasing sensory volume is irrelevant. We varied sensory information during a refuge-tracking task by changing illumination (vision) and conductivity (electroreception). The gain between refuge movement stimuli and fish tracking responses was functionally identical across all sensory conditions. However, there was a significant increase in the tracking error in the dark (no visual cues). This was a result of spontaneous whole-body oscillations (0.1 to 1. Hz) produced by the fish. These movements were costly: in the dark, fish swam over three times further when tracking and produced more net positive mechanical work. The magnitudes of these oscillations increased as electrosensory salience was degraded via increases in conductivity. In addition, tail bending (1.5 to 2.35. Hz), which has been reported to enhance electrosensory perception, occurred only during trials in the dark. These data show that both categories of movements - whole-body oscillations and tail bends - actively shape the spatiotemporal dynamics of electrosensory feedback.