Velocity computation in the primate visual system
David C. Bradley,Manu S. Goyal +1 more
TLDR
Although no model is yet firmly established, evidence suggests that computing pattern velocity from local-velocity estimates involves simple operations in the spatiotemporal frequency domain.Abstract:
Computational neuroscience combines theory and experiment to shed light on the principles and mechanisms of neural computation. This approach has been highly fruitful in the ongoing effort to understand velocity computation by the primate visual system. This Review describes the success of spatiotemporal-energy models in representing local-velocity detection. It shows why local-velocity measurements tend to differ from the velocity of the object as a whole. Certain cells in the middle temporal area are thought to solve this problem by combining local-velocity estimates to compute the overall pattern velocity. The Review discusses different models for how this might occur and experiments that test these models. Although no model is yet firmly established, evidence suggests that computing pattern velocity from local-velocity estimates involves simple operations in the spatiotemporal frequency domain.read more
Citations
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Journal ArticleDOI
Approach sensitivity in the retina processed by a multifunctional neural circuit.
Thomas Münch,Thomas Münch,Rava Azeredo da Silveira,Sandra Siegert,Tim J. Viney,Gautam B. Awatramani,Gautam B. Awatramani,Botond Roska +7 more
TL;DR: An approach-sensitive ganglion cell type in the mouse retina is identified, elements of its afferent neural circuit are resolved, and how these confer approach sensitivity on the ganglions are described.
Journal ArticleDOI
Motion psychophysics: 1985-2010.
David C. Burr,Peter Thompson +1 more
TL;DR: This review traces progress made in the field of visual motion research from 1985 through to 2010, and attempts to cover most of the major achievements, and speculate on where the field is heading.
Journal ArticleDOI
Advancement of motion psychophysics: review 2001-2010.
TL;DR: A survey of psychophysical studies of motion perception carried out mainly in the last 10 years to highlight the richness and diversity of this large research field and to clarify what has been done and what questions have been left unanswered.
Journal ArticleDOI
A Three-Dimensional Spatiotemporal Receptive Field Model Explains Responses of Area MT Neurons to Naturalistic Movies
TL;DR: Responses to area MT responses to naturalistic movies are largely consistent with predictions based on simple stimuli, however, models fit using naturalistic stimuli reveal several novel properties of MT receptive fields that had not been shown in prior experiments.
Journal ArticleDOI
Do we track what we see? Common versus independent processing for motion perception and smooth pursuit eye movements: A review
Miriam Spering,Anna Montagnini +1 more
TL;DR: For instance, the authors showed that visual motion information for the guidance of perception and smooth pursuit eye movements is processed in the same visual pathway in the brain, crucially involving the middle temporal area (MT).
References
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Determining optical flow
TL;DR: In this paper, a method for finding the optical flow pattern is presented which assumes that the apparent velocity of the brightness pattern varies smoothly almost everywhere in the image, and an iterative implementation is shown which successfully computes the Optical Flow for a number of synthetic image sequences.
Proceedings ArticleDOI
Determining Optical Flow
TL;DR: In this article, a method for finding the optical flow pattern is presented which assumes that the apparent velocity of the brightness pattern varies smoothly almost everywhere in the image, and an iterative implementation is shown which successfully computes the Optical Flow for a number of synthetic image sequences.
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Receptive fields and functional architecture of monkey striate cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: The striate cortex was studied in lightly anaesthetized macaque and spider monkeys by recording extracellularly from single units and stimulating the retinas with spots or patterns of light, with response properties very similar to those previously described in the cat.
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Receptive fields of single neurones in the cat's striate cortex
David H. Hubel,Torsten N. Wiesel +1 more
TL;DR: The present investigation, made in acute preparations, includes a study of receptive fields of cells in the cat's striate cortex, which resembled retinal ganglion-cell receptive fields, but the shape and arrangement of excitatory and inhibitory areas differed strikingly from the concentric pattern found in retinalganglion cells.