认知室学术报告【9月19日周二13:30-14:30,南楼五层会议室】:Habituation  of  visual  motion  adaptation  exhibits  direction,  not  retinotopic,  spatiotopic  selectivity

[2017-09-19]

时间:2017年 9 月 19 日,周二,13:30--14:30

地点:心理所南楼五层会议室

报告人:董雪

 

主持人: 伍海燕

 

报告题目:Habituation of visual motion adaptation exhibits direction, not retinotopic, spatiotopic selectivity

 

报告摘要:Both adaptation and perceptual learning can change how we perceive the visual environment, reflecting the plasticity of the visual system. Our previous work has attempted to investigate the interaction between the two aspects of visual plasticity. The main finding is that multiple days of repeated motion adaptation attenuates motion aftereffect, which is explained by habituation to the trained motion adapter. Interestingly, there is almost no transfer of habituation effect to the untrained adapter which differed from the trained adapter in all the following features, retinotopic location, spatiotopic location and motion direction. Research on visual perceptual learning has suggested that the transfer of learning effect can vary according to the features tested, such as motion directions, locations, spatial frequencies, orientations, and so on. Because features are processed in different neural loci along the visual pathways, probing the key features that determine the transfer of habituation in repeated motion adaptation may help disclose the underlying neural mechanisms for this phenomenon. In three experiments, we examined the role of retinotopic location, spatiotopic location, and motion direction on the transfer of habituation, respectively. In each experiment, only one of the features was kept the same for the trained and untrained conditions. We observed substantial transfer of habituation effect only when the motion direction remained consistent for the trained and untrained conditions. The current findings suggest that habituation of motion adaptation is likely related to the plasticity of direction-selective neurons with larger receptive fields, e.g. neurons in MST or LIP. 

 
 
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