Two Functional Channels from Primary Visual Cortex to Dorsal Visual Cortical Areas

Yabuta, Neusa Harumi; Sawatari, Atomu; Callaway, Edward M.

doi:10.1126/science.1057916

Cited by 136 publications

(92 citation statements)

References 28 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In both cases, low spatial frequency stimuli are required to elicit optimal intrasaccadic motion perception, as would be expected from studies investigating high-speed motion processing with static eyes (4, 10). Low-level motion detectors in the magnocellular stream (18), which have spatiotemporal characteristics allowing them to detect very brief and fast moving stimuli (19,20), are most likely to underlie intrasaccadic motion perception. Electrophysiological evidence shows that neurons in the middle temporal cortex, an area devoted to visual motion analysis, are able to encode the fine temporal structure of moving stimuli varying in direction on a timescale as short as 30 ms (21,22).…”

Section: Discussionmentioning

confidence: 99%

Motion perception of saccade-induced retinal translation

Castet

Jeanjean

Masson

2002

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Active visual perception relies on the ability to interpret correctly retinal motion signals induced either by moving objects viewed with static eyes or by stationary objects viewed with moving eyes. A motionless environment is not normally perceived as moving during saccadic eye movements. It is commonly believed that this phenomenon involves central oculomotor signals that inhibit intrasaccadic visual motion processing. The keystone of this extraretinal theory relies on experimental reports showing that physically stationary scenes displayed only during saccades, thus producing high retinal velocities, are never perceived as moving but appear as static blurred images. We, however, provide evidence that stimuli optimized for high-speed motion detection elicit clear motion perception against saccade direction, thus making the search for extraretinal suppression superfluous. The data indicate that visual motion is the main cue used by observers to perform the task independently of other perceptual factors covarying with intrasaccadic stimulation. By using stimuli of different durations, we show that the probability of perceiving the stimulus as static, rather than moving, increases when the intrasaccadic stimulation is preceded or followed by a significant extrasaccadic stimulation. We suggest that intrasaccadic motion perception is accomplished by motion-selective magnocellular neurons through temporal integration of rapidly increasing retinal velocities. The functional mechanism that usually prevents this intrasaccadic activity from being perceived seems to rely on temporal masking effects induced by the static retinal images present before and͞or after the saccade.

show abstract

Section: Discussionmentioning

confidence: 99%

Motion perception of saccade-induced retinal translation

Castet

Jeanjean

Masson

2002

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…The 4B neurons project to either MT or the thick stripes of V2, with only a small minority (ϳ5%) projecting to both areas (Sincich and Horton, 2003). They also have different morphologies (Levitt et al, 1994) and distinct patterns of inputs, with the direct pathway receiving projections solely from the magnocellular stream and the indirect receiving a mixture of magnocellular and parvocellular inputs (Yabuta et al, 2001;Nassi and Callaway, 2006) (Fig. 4).…”

Section: Anatomical Pathways For Disparity Processingmentioning

confidence: 99%

Disparity Channels in Early Vision

Roe¹,

Parker²,

Born

et al. 2007

J. Neurosci.

View full text Add to dashboard Cite

The past decade has seen a dramatic increase in our knowledge of the neural basis of stereopsis. New cortical areas have been found to represent binocular disparities, new representations of disparity information (e.g., relative disparity signals) have been uncovered, the first topographic maps of disparity have been measured, and the first causal links between neural activity and depth perception have been established. Equally exciting is the finding that training and experience affects how signals are channeled through different brain areas, a flexibility that may be crucial for learning, plasticity, and recovery of function. The collective efforts of several laboratories have established stereo vision as one of the most productive model systems for elucidating the neural basis of perception. Much remains to be learned about how the disparity signals that are initially encoded in primary visual cortex are routed to and processed by extrastriate areas to mediate the diverse capacities of three-dimensional vision that enhance our daily experience of the world.

show abstract

“…For example, the star pyramid of layer 4, by virtue of its extended apical and basal dendrites, will form synapses with axons in the superficial layers to which the dendrites of the spiny stellate do not have access. Such an appeal to anatomy could account for differences in functional input specificity to pyramidal cells and spiny stellate cells in layer 4 of the monkey visual cortex (Yabuta and Callaway, 1998;Yabuta et al, 2001).…”

Section: Neuronal Specificitymentioning

confidence: 99%

A Quantitative Map of the Circuit of Cat Primary Visual Cortex

Binzegger¹,

Douglas²,

Martin³

2004

J. Neurosci.

790

996

View full text Add to dashboard Cite

We developed a quantitative description of the circuits formed in cat area 17 by estimating the "weight" of the projections between different neuronal types. To achieve this, we made three-dimensional reconstructions of 39 single neurons and thalamic afferents labeled with horseradish peroxidase during intracellular recordings in vivo. These neurons served as representatives of the different types and provided the morphometrical data about the laminar distribution of the dendritic trees and synaptic boutons and the number of synapses formed by a given type of neuron. Extensive searches of the literature provided the estimates of numbers of the different neuronal types and their distribution across the cortical layers. Applying the simplification that synapses between different cell types are made in proportion to the boutons and dendrites that those cell types contribute to the neuropil in a given layer, we were able to estimate the probable source and number of synapses made between neurons in the six layers. The predicted synaptic maps were quantitatively close to the estimates derived from the experimentalelectronmicroscopicstudiesforthecaseofthemainsourcesofexcitatoryandinhibitoryinputtothespinystellatecells,whichform a major target of layer 4 afferents. The map of the whole cortical circuit shows that there are very few "strong" but many "weak" excitatory projections, each of which may involve only a few percentage of the total complement of excitatory synapses of a single neuron.

show abstract

Two Functional Channels from Primary Visual Cortex to Dorsal Visual Cortical Areas

Cited by 136 publications

References 28 publications

Motion perception of saccade-induced retinal translation

Motion perception of saccade-induced retinal translation

Disparity Channels in Early Vision

A Quantitative Map of the Circuit of Cat Primary Visual Cortex

Contact Info

Product

Resources

About