18 papers · ranked by Valyu relevance
Reinhard Werth, Thomas Jacobsen, Clara Casco
Although subjective conscious experience and introspection have long been considered unscientific and banned from psychology, they are indispensable in scientific practice. These terms are used in scientific contexts today; however, their meaning remains vague, and earlier objections to the distinction between…
Jihane Homman-Ludiye, James A. Bourne
The integration of the visual stimulus takes place at the level of the neocortex, organized in anatomically distinct and functionally unique areas. Primates, including humans, are heavily dependent on vision, with approximately 50% of their neocortical surface dedicated to visual processing and possess many more visual…
Ying Yang, Michael J. Tarr, Robert E. Kass, Elissa M. Aminoff
The human visual cortex is organized in a hierarchical manner. Although a significant body of evidence has been accumulated in support of this hypothesis, specific details regarding the spatial and temporal information flow remain open. Here we present detailed spatio-temporal correlation profiles of neural activity…
Cyriel M. A. Pennartz, Matthijs N. Oude Lohuis, Umberto Olcese
The definition of the visual cortex is primarily based on the evidence that lesions of this area impair visual perception. However, this does not exclude that the visual cortex may process more information than of retinal origin alone, or that other brain structures contribute to vision. Indeed, research across the…
Peter Beech, Shanshan Jia, Zhaofei Yu, Jian K. Liu
The visual pathway involves complex networks of cells and regions which contribute to the encoding and processing of visual information. While some aspects of visual perception are understood, there are still many unanswered questions regarding the exact mechanisms of visual encoding and the organization of visual…
Holly Bridge, Andrew Bell, Matt Ainsworth, Jerome Sallet + 7 more
Lesions of primate primary visual cortex (V1) lead to loss of conscious visual perception, and are often devastating to those affected. Understanding the neural consequences of such damage may aid the development of rehabilitation methods. In this rare case of a Rhesus macaque (monkey S), likely born without V1, we…
Li Zhaoping
Our brain recognizes only a tiny fraction of sensory input, due to an information processing bottleneck. This blinds us to most visual inputs. Since we are blind to this blindness, only a recent framework highlights this bottleneck by formulating vision as mainly looking and seeing. Looking selects a tiny fraction of…
Henrique Soares Dutra Oliveira, Danielle Calil de Sousa, Sarah Teixeira Camargos, Francisco Cardoso + 1 more
'Sarah Teixeira Camargos' 'Francisco Cardoso' 'Paulo Caramelli'] Title: ABSTRACT. Vision is a sensory resource that enables the creation of an internal model for perceiving the external world. The act of seeing is much more than the mere process of light reflection on the retina. Higher-order visual areas play a…
R. Fioresi, J. Petkovic
We present a simple mathematical model for the mammalian low visual pathway, taking into account its key elements: retina, lateral geniculate nucleus (LGN), primary visual cortex (V1). The analogies between the cortical level of the visual system and the structure of popular CNNs, used in image classification tasks…
Johanna Bergmann, Andrew T. Morgan, Lars Muckli
Visual illusions and visual imagery are conscious sensory events that lack a corresponding physical input. But while everyday mental imagery feels distinct from incoming stimulus input, visual illusions, like hallucinations, are under limited volitional control and appear indistinguishable from physical reality.…
Karoline Hovde, Ida V. Rautio, Andrea M. Hegstad, Menno P. Witter + 1 more
The mammalian visual system can be broadly divided into two functional processing pathways: a dorsal stream supporting visually and spatially guided actions, and a ventral stream enabling object recognition. In rodents, the majority of visual signaling in the dorsal stream is transmitted to frontal motor cortices via…
Wen Qin, Chunshui Yu
The visual cortex has been traditionally considered as a stimulus-driven, unimodal system with a hierarchical organization. However, recent animal and human studies have shown that the visual cortex responds to non-visual stimuli, especially in individuals with visual deprivation congenitally, indicating the supramodal…
Hannah C Goldbach, Bradley Akitake, Caitlin E Leedy, Mark H Histed
Primary visual cortex (V1) in the mouse projects to numerous brain areas, including several secondary visual areas, frontal cortex, and basal ganglia. While it has been demonstrated that optogenetic silencing of V1 strongly impairs visually-guided behavior, it is not known which downstream areas are required for visual…
MARTIN I. SERENO, COLIN T. MCDONALD, JOHN M. ALLMAN
Dense retinotopy data sets were obtained by microelectrode visual receptive field mapping in dorsal and lateral visual cortex of anesthetized owl monkeys. The cortex was then physically flatmounted and stained for myelin or cytochrome oxidase. Retinotopic mapping data were digitized, interpolated to a uniform grid…
David Pitcher
Influential models of primate visual cortex describe two functionally distinct pathways: a ventral pathway for object recognition and the dorsal pathway for spatial and action processing. However, recent human and non-human primate research suggests the existence of a third visual pathway projecting from early visual…
G. Tomou, B. Baltaretu, A. Ghaderi, J. D. Crawford
Visual cortex is thought to show both dorsoventral and hemispheric modularity, but it is not known if the same functional modules emerge spontaneously from an unsupervised network analysis, or how they interact when saccades necessitate increased sharing of spatial information. Here, we address these issues by applying…
Charles Q. Wu
At HVEI-2012, I presented a neurobiologically-based model for trichromatic color sensations in humans, mapping the neural substrate for color sensations to V1-L4—the thalamic recipient layer of the primary visual cortex. In this paper, I propose that V1-L4 itself consists of three distinct sub-layers that directly…
Hamidreza Ramezanpour, Mazyar Fallah
Centre for Vision Research, York University, Toronto, Ontario, Canada School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, Ontario, Canada VISTA: Vision Science to Application, York University, Toronto, Ontario, Canada Department of Psychology, Faculty of Health, York University…