Spatial updating and the maintenance of visual constancy

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In this way, we are able to keep track of relevant objects in the outside world and interact with them in meaningful ways.

ABSTRACT: Head movements are primarily sensed in a reference frame tied to the head, yet they are used to calculate self-orientation relative to the world.

Department of Anatomy and Neurobiology, Box 8108, Washington University School of Medicine, 660 South Euclid Avenue, St.

Louis, MO 63110, ETATS-UNIS-Spatial updating is the means by which we keep track of the locations of objects in space even as we move.

Many of these updating signals arise from brainstem regions that monitor our ongoing movements and subsequently transmit this information to the cortex via pathways that likely include the thalamus.

The latter mechanism, called visuomotor updating, is implemented in the dorsal visual stream of the brain.

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We explore the world around us by making rapid eye movements to objects of interest.

Spatial updating is the means by which we keep track of the locations of objects in space even as we move.

Four decades of research have shown that humans and non-human primates can take the amplitude and direction of intervening movements into account, including saccades (both head-fixed and head-free), pursuit, whole-body rotations and translations.

This review highlights the relevant spatial updating studies and provides a summary of the field today. and consistent with the hypothesis that this scene statistic is used for estimating the illuminant. We found that subjects were very poor at judging the color of a lamp from the light reflected by the scene it illuminated.

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We find that spatial constancy is maintained by a highly evolved neural mechanism that keeps track of our movements, transmits this information to relevant brain regions, and then uses this information to change the way in which single neurons respond. It is further shown for two figural parameters of the stimuli that they influence the spatial extent and hence could have contributed to an underestimation of the spatial extent by Granzier et al. They were much better at judging the color of a surface within the scene. Medendorp Philos Trans R Soc Lond B Biol Sci 366 476-91 (2011) The success of the human species in interacting with the environment depends on the ability to maintain spatial stability despite the continuous changes in sensory and motor inputs owing to movements of eyes, head and body.

Previous studies in macaque lateral intraparietal cortex (area LIP) have shown that individual neurons update, or "remap," the locations of salient visual stimuli at the time of an eye movement.

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