Spatial updating in human parietal cortex
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The relative contribution of retinal signals is not fixed but depends on both the time available to integrate these signals as well as the distance between the saccade target and the remembered location.
ABSTRACT: The goal of this study was to explore whether cortico-cortical interactions measured during the retention of visual information in working memory are sensitive to the alternation of the output modality, that is, to the way the stored information is going to be used.
Parametric manipulation of the distance between the to-be-memorized stimulus and saccade target revealed that target displacement bias increased over time and changed its spatial profile from being initially centered on locations around the saccade target to becoming spatially global.
Taken together results suggest that we neither rely exclusively on extraretinal nor on retinal information in updating working memory representations across saccades.
ABSTRACT: It is relatively easy to adapt visually-guided saccades because the visual vector and the saccade vector match.