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Papers by Sébastien Coppe
Journal of Vision, 2010
Presenting a few dots moving coherently on a screen can yield to the perception of human motion. ... more Presenting a few dots moving coherently on a screen can yield to the perception of human motion. This perception is based on a specific network that is segregated from the traditional motion perception network and that includes the superior temporal sulcus (STS). In this study, we investigate whether this biological motion perception network could influence the smooth pursuit response evoked by a point-light walker. We found that smooth eye velocity during pursuit initiation was larger in response to the point-light walker than in response to one of its scrambled versions, to an inverted walker or to a single dot stimulus. In addition, we assessed the proximity to the point-light walker (i.e. the amount of information about the direction contained in the scrambled stimulus and extracted from local motion cue of biological motion) of each of our scrambled stimuli in a motion direction discrimination task with manual responses and found that the smooth pursuit response evoked by those stimuli moving across the screen was modulated by their proximity to the walker. Therefore, we conclude that biological motion facilitates smooth pursuit eye movements, hence influences both perception and action.
4th European Conference of the International Federation for Medical and Biological Engineering, 2009
The capacity to identify and perceive biologically relevant actions is essential for survival and... more The capacity to identify and perceive biologically relevant actions is essential for survival and social skills. We hypothesized that the perception of biological motion could induce a different behavioral response compared with stimuli devoid of biological relevance. To check this hypothesis, we analyzed the eye movement response to a moving walker, or its scrambled version. Subjects were asked to pursue a point-light walker, created using Cutting's algorithm, or its scrambled version. The walker consisted of 11 dots; a green ...
Journal of Neurophysiology, Sep 5, 2012
Prediction is essential for motor function in everyday life. For instance, predictive mechanisms ... more Prediction is essential for motor function in everyday life. For instance, predictive mechanisms improve the perception of a moving target by increasing eye speed anticipatively, thus reducing motion blur on the retina. Subregions of the frontal lobes play a key role in eye movements in general and in smooth pursuit in particular but their precise function is not firmly established. Here, the role of frontal lobes in the timing of predictive action is demonstrated by studying predictive smooth pursuit during transient blanking of a ...
Journal of Vision, 2010
Presenting a few dots moving coherently on a screen can yield to the perception of human motion. ... more Presenting a few dots moving coherently on a screen can yield to the perception of human motion. This perception is based on a specific network that is segregated from the traditional motion perception network and that includes the superior temporal sulcus (STS). In this study, we investigate whether this biological motion perception network could influence the smooth pursuit response evoked by a point-light walker. We found that smooth eye velocity during pursuit initiation was larger in response to the point-light walker than in response to one of its scrambled versions, to an inverted walker or to a single dot stimulus. In addition, we assessed the proximity to the point-light walker (i.e. the amount of information about the direction contained in the scrambled stimulus and extracted from local motion cue of biological motion) of each of our scrambled stimuli in a motion direction discrimination task with manual responses and found that the smooth pursuit response evoked by those stimuli moving across the screen was modulated by their proximity to the walker. Therefore, we conclude that biological motion facilitates smooth pursuit eye movements, hence influences both perception and action.
4th European Conference of the International Federation for Medical and Biological Engineering, 2009
The capacity to identify and perceive biologically relevant actions is essential for survival and... more The capacity to identify and perceive biologically relevant actions is essential for survival and social skills. We hypothesized that the perception of biological motion could induce a different behavioral response compared with stimuli devoid of biological relevance. To check this hypothesis, we analyzed the eye movement response to a moving walker, or its scrambled version. Subjects were asked to pursue a point-light walker, created using Cutting's algorithm, or its scrambled version. The walker consisted of 11 dots; a green ...
Journal of Neurophysiology, Sep 5, 2012
Prediction is essential for motor function in everyday life. For instance, predictive mechanisms ... more Prediction is essential for motor function in everyday life. For instance, predictive mechanisms improve the perception of a moving target by increasing eye speed anticipatively, thus reducing motion blur on the retina. Subregions of the frontal lobes play a key role in eye movements in general and in smooth pursuit in particular but their precise function is not firmly established. Here, the role of frontal lobes in the timing of predictive action is demonstrated by studying predictive smooth pursuit during transient blanking of a ...