Spatiotopic coding and remapping in humans

Burr, David; Morrone, Maria Concetta

doi:10.1098/rstb.2010.0244

Cited by 113 publications

(100 citation statements)

References 97 publications

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“…We do not perceive this retinal smear, and are unable to see our own saccadic eye movements in the mirror. Is the retinal motion during rapid movements actively suppressed, and if so, what are the underlying mechanisms [7,8]?…”

Section: The Challenge Of Visual Stabilitymentioning

confidence: 99%

Visual stability

Melcher

2011

Phil. Trans. R. Soc. B

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Our vision remains stable even though the movements of our eyes, head and bodies create a motion pattern on the retina. One of the most important, yet basic, feats of the visual system is to correctly determine whether this retinal motion is owing to real movement in the world or rather our own selfmovement. This problem has occupied many great thinkers, such as Descartes and Helmholtz, at least since the time of Alhazen. This theme issue brings together leading researchers from animal neurophysiology, clinical neurology, psychophysics and cognitive neuroscience to summarize the state of the art in the study of visual stability. Recently, there has been significant progress in understanding the limits of visual stability in humans and in identifying many of the brain circuits involved in maintaining a stable percept of the world. Clinical studies and new experimental methods, such as transcranial magnetic stimulation, now make it possible to test the causal role of different brain regions in creating visual stability and also allow us to measure the consequences when the mechanisms of visual stability break down.

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Section: The Challenge Of Visual Stabilitymentioning

confidence: 99%

Visual stability

Melcher

2011

Phil. Trans. R. Soc. B

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“…B 372: 20160111 contrast has been provided. As, in general, we perceive object motion veridically regardless of any eye, head or body movements that could induce retinal image changes in a complex way, spatiotopic representations have to be constructed at a level higher than V1, where the visual information is encoded retinotopically [16]. In fact, it has been shown that visual motion information is encoded in a spatiotopic coordinate at MT/V5 (and at higher areas) [17,18].…”

Section: Introductionmentioning

confidence: 99%

Individual differences in visual motion perception and neurotransmitter concentrations in the human brain

Takeuchi

Yoshimoto

Shimada³

et al. 2017

Phil. Trans. R. Soc. B

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One contribution of 15 to a theme issue 'Auditory and visual scene analysis'. Recent studies have shown that interindividual variability can be a rich source of information regarding the mechanism of human visual perception. In this study, we examined the mechanisms underlying interindividual variability in the perception of visual motion, one of the fundamental components of visual scene analysis, by measuring neurotransmitter concentrations using magnetic resonance spectroscopy. First, by psychophysically examining two types of motion phenomena-motion assimilation and contrast-we found that, following the presentation of the same stimulus, some participants perceived motion assimilation, while others perceived motion contrast. Furthermore, we found that the concentration of the excitatory neurotransmitter glutamate-glutamine (Glx) in the dorsolateral prefrontal cortex (Brodmann area 46) was positively correlated with the participant's tendency to motion assimilation over motion contrast; however, this effect was not observed in the visual areas. The concentration of the inhibitory neurotransmitter g-aminobutyric acid had only a weak effect compared with that of Glx. We conclude that excitatory process in the suprasensory area is important for an individual's tendency to determine antagonistically perceived visual motion phenomena.This article is part of the themed issue 'Auditory and visual scene analysis'.

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“…Moreover, they speculated that the spacetime compression originates from anticipatory repositioning of visual receptive fields 8,25,31,32) , leading to an immediate relativistic consequence in perceptual space and time 29) . But this attractive hypothesis awaits further empirical support.…”

Section: The Mirror Paradigmmentioning

confidence: 99%

“…This compression may help to mediate an earlier perception of the target in a spatiotopically appropriate position in advance of its physical foveation 25) . Although the neural substrates underlying spacetime compression are still unclear, the key element may be in the visual remapping process that is neither instantaneous nor uniform over the retina, leading to transient deformations in spatio-temporal receptive field organization during remapping 31) . The manifold concept in modern physics may help our understanding of the compression of perceptual spacetime during saccades.…”

Section: Relativity In Visual Spacetimementioning

confidence: 99%

The old-but-new theories about human voluntary motor control

Suzuki

Wasaka

2012

JPFSM

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For more than a century, neuroscientists have debated the problem of how selfgenerated voluntary motor actions are executed without interference from sensory information elicited by the movements. In the 1950's, two theories were proposed: the corollary discharge theory by Sperry 1) and the efference copy theory by von Holst and Mittelstaedt 2) . They are essentially identical in proposing the necessity of specific neuronal mechanisms to suppress undesirable percepts or reflexes, both of which might disturb ongoing movements. However, this raises a simple question as to whether the control system always ignores sensory information whenever the intended movements are in progress. Here, we review recent findings and currently debated problems in corollary discharge theory.

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Spatiotopic coding and remapping in humans

Cited by 113 publications

References 97 publications

Visual stability

Visual stability

Individual differences in visual motion perception and neurotransmitter concentrations in the human brain

The old-but-new theories about human voluntary motor control

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