Journal ArticleDOI
Compression of visual space before saccades.
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TLDR
It is shown that changes in apparent visual direction anticipate saccades and are not of the same size, or even in the same direction, for all parts of the visual field and there is a compression of visual space sufficient to reduce the spacing and even the apparent number of pattern elements.Abstract:
Saccadic eye movements, in which the eye moves rapidly between two resting positions, shift the position of our retinal images. If our perception of the world is to remain stable, the visual directions associated with retinal sites, and others they report to, must be updated to compensate for changes in the point of gaze. It has long been suspected that this compensation is achieved by a uniform shift of coordinates driven by an extra-retinal position signal, although some consider this to be unnecessary. Considerable effort has been devoted to a search for such a signal and to measuring its time course and accuracy. Here, by using multiple as well as single targets under normal viewing conditions, we show that changes in apparent visual direction anticipate saccades and are not of the same size, or even in the same direction, for all parts of the visual field. We also show that there is a compression of visual space sufficient to reduce the spacing and even the apparent number of pattern elements. The results are in part consistent with electrophysiological findings of anticipatory shifts in the receptive fields of neurons in parietal cortex and superior colliculi.read more
Citations
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Journal ArticleDOI
Sensory Prediction Errors Drive Cerebellum-Dependent Adaptation of Reaching
TL;DR: Adaptation to visuomotor perturbations depends on the cerebellum and is driven by the mismatch between predicted and actual sensory outcome of motor commands, suggesting that only sensory prediction errors influence this process.
Journal ArticleDOI
Changes in visual perception at the time of saccades
TL;DR: Evidence suggests that saccades trigger two distinct neural processes: a suppression of visual sensitivity, specific to the magnocellular pathway, that dampens the sensation of motion and a gross perceptual distortion of visual space in anticipation of the repositioning of gaze.
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Neuronal mechanisms of visual stability
TL;DR: This review considers the substantial advances in understanding the neuronal mechanisms underlying this visual stability derived primarily from neuronal recording and inactivation studies in the monkey, an excellent model for systems in the human brain.
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Eye movements: The past 25 years
TL;DR: This article reviews the past 25 years of research on eye movements, focusing on three oculomotor behaviors: gaze control, smooth pursuit and saccades, and on their interactions with vision.
Journal ArticleDOI
Updating of the visual representation in monkey striate and extrastriate cortex during saccades
Kae Nakamura,Carol L. Colby +1 more
TL;DR: Results indicate that extrastriate visual areas are involved in the process of remapping, and show that remapping was very rare in striate cortex.
References
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Journal ArticleDOI
Object vision and spatial vision: two cortical pathways
TL;DR: Evidence is reviewed indicating that striate cortex in the monkey is the source of two multisynaptic corticocortical pathways, one of which enables the visual identification of objects and the other allows instead the visual location of objects.
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Das Reafferenzprinzip. Wechselwirkungen zwischen Zentralnervensystem und Periphase
TL;DR: (~) Wenn man den Strum im Kondensatorkreis um-nittelbar dureh die Spulen Sp~ and Sp~ hindurchsehickt, wird die Phase der Ablenkung des Kathodenstrahlbiindels zur Anfaehung ungeeignet.
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The updating of the representation of visual space in parietal cortex by intended eye movements.
TL;DR: Parietal cortex both anticipates theretinal consequences of eye movements and updates the retinal coordinates of remembered stimuli to generate a continuously accurate representation of visual space.
Journal ArticleDOI
Neural basis of the spontaneous optokinetic response produced by visual inversion.
TL;DR: One of the most conspicuous behavioral effects produced by surgical rotation of the eyeball through 180 degrees is the forced circling or spontaneous optokinetic reaction.
Journal ArticleDOI
The representation of the visual field on the cerebral cortex in monkeys.
P. M. Daniel,D. Whitteridge +1 more
TL;DR: On the basis of his extensive and elegant anatomical investigations on the visual cortex, Poliak (1932) suggested that a mathematical projection of the retina on the cerebral cortex must exist and this work has made such a surface, folded it and compared it with the calcarine cortex of the monkey.