首页> 外文会议>Computational Neuroscience Meeting (CNS'01) Jul, 2001 Monterey, California >Slowly moving stimuli induce characteristic periodic activity waves in an excitable membrane model of visual motion processing
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Slowly moving stimuli induce characteristic periodic activity waves in an excitable membrane model of visual motion processing

机译:缓慢移动的刺激在视觉运动处理的可激发膜模型中诱发特征性周期性活动波

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摘要

A two-dimensional sheet of locally connected neural elements may be used to model motion detection in visual cortex. External inputs applied to such a system give rise to activity waves, which propagate with a speed determined by the membrane parameters. Membrane inputs which are moving at a speed less than this intrinsic propagation rate give rise to periodic activity waves, which outrun the stimulus. The spacing between these waves is compressed in front of the stimulus, and expanded behind it, in a Doppler-like fashion. The wave frequency may be used to characterize the speed of the stimulus.
机译:局部连接的神经元的二维片可以用于对视觉皮层中的运动检测建模。施加到这样的系统的外部输入引起活动波,其以由膜参数确定的速度传播。以小于该固有传播速率的速度移动的膜输入引起周期性的活动波,其超出了刺激。这些波之间的间隔在刺激前被压缩,并在其后以多普勒式的方式扩展。波频率可以用来表征刺激的速度。

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