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The spatial frequency tuning of optic-flow-dependent behaviors in the bumblebee Bombus impatiens

机译:大黄蜂熊凤蝶中光流相关行为的空间频率调谐

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摘要

Insects use visual estimates of flight speed for a variety of behaviors, including visual navigation, odometry, grazing landings and flight speed control, but the neuronal mechanisms underlying speed detection remain unknown. Although many models and theories have been proposed for how the brain extracts the angular speed of the retinal image, termed optic flow, we lack the detailed electrophysiological and behavioral data necessary to conclusively support any one model. One key property by which different models of motion detection can be differentiated is their spatiotemporal frequency tuning. Numerous studies have suggested that optic-flow-dependent behaviors are largely insensitive to the spatial frequency of a visual stimulus, but they have sampled only a narrow range of spatial frequencies, have not always used narrowband stimuli, and have yielded slightly different results between studies based on the behaviors being investigated. In this study, we present a detailed analysis of the spatial frequency dependence of the centering response in the bumblebee Bombus impatiens using sinusoidal and square wave patterns.
机译:昆虫对各种行为都使用了飞行速度的视觉估计,包括视觉导航,里程表,放牧着陆和飞行速度控制,但速度检测所基于的神经元机制仍然未知。尽管已经提出了许多关于大脑如何提取视网膜图像角速度(称为光流)的模型和理论,但我们缺乏必要的详细电生理和行为数据来最终支持任何一种模型。可以区分运动检测的不同模型的一项关键特性是其时空频率调整。大量研究表明,依赖光流的行为对视觉刺激的空间频率基本不敏感,但是他们仅采样了狭窄的空间频率范围,并不总是使用窄带刺激,并且得出的研究结果略有不同。根据正在调查的行为。在这项研究中,我们使用正弦波和方波模式对大黄蜂Bombus impatiens中的定心响应的空间频率依赖性进行了详细分析。

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