Open-loop speed discrimination performance of ocular following response and perception
Open-loop speed discrimination performance of ocular following response and perception
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DOI：
10.1016/j.visres.2010.02.010
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发表时间：
2010-04-21
期刊：
影响因子：
1.8
通讯作者：
Warzecha, Anne-Kathrin
中科院分区：
文献类型：
--
作者：
Bostroem, Kim Joris;Warzecha, Anne-Kathrin
到目前为止，神经元噪声在多大程度上影响行为反应仍未得到解决。在这里，我们调查，在人类视觉运动路径噪声的起源，限制了整个系统的性能。特别是，我们询问感知和眼球运动是否受到共同噪声源的限制，或者在分离成不同流之后的处理阶段是否限制了它们的性能。我们使用人类受试者的眼球跟随反应和同时进行的心理物理范式来直接比较知觉系统和动眼肌系统在速度识别能力方面的差异。结果表明，在开环条件下，知觉系统优于动眼肌系统，二者的响应不相关。从这些发现可以得出两个不同的结论。知觉和动眼神经通路是有效分离的，或者后感觉（运动）噪声的量与感觉噪声的量相比是不可忽略的。鉴于已确立的实验结果，并考虑到其合理性，我们倾向于后一种结论。(C) 2010 Elsevier Ltd.版权所有。
So far, it remains largely unresolved to what extent neuronal noise affects behavioral responses. Here, we investigate, where in the human visual motion pathway noise originates that limits the performance of the entire system. In particular, we ask whether perception and eye movements are limited by a common noise source, or whether processing stages after the separation into different streams limit their performance. We use the ocular following response of human subjects and a simultaneously performed psychophysical paradigm to directly compare perceptual and oculomotor system with respect to their speed discrimination ability. Our results show that on the open-loop condition the perceptual system is superior to the oculomotor system and that the responses of both systems are not correlated. Two alternative conclusions can be drawn from these findings. Either the perceptual and oculomotor pathway are effectively separate, or the amount of post-sensory (motor) noise is not negligible in comparison to the amount of sensory noise. In view of well-established experimental findings and due to plausibility considerations, we favor the latter conclusion. (C) 2010 Elsevier Ltd. All rights reserved.