Results 91 to 100 of about 578,779 (211)

Changes in structural network topology correlate with severity of hallucinatory behavior in Parkinson's disease [PDF]

open access: yes, 2019
Inefficient integration between bottom-up visual input and higher order visual processing regions is implicated in visual hallucinations in Parkinson's disease (PD). Here, we investigated white matter contributions to this perceptual imbalance hypothesis.
Hall, Julie   +7 more
core   +2 more sources

Linking the Laminar Circuits of Visual Cortex to Visual Perception [PDF]

open access: yes, 2001
A detailed neural model is being developed of how the laminar circuits of visual cortical areas V1 and V2 implement context-sensitive binding processes such as perceptual grouping and attention, and develop and learn in a stable way.
Grossberg, Stephen
core   +1 more source

Physiological Mechanisms Underlying Motion-Induced Blindness [PDF]

open access: yes, 2008
Visual disappearance illusions - such as motion-induced blindness (MIB) - are commonly used to study the neural underpinnings of visual perception. In such illusions a salient visual target becomes perceptually invisible.
Camilo Libedinsky   +2 more
core   +1 more source

Generation of Direction Selectivity by Isotropic Intracortical Connections [PDF]

open access: yes, 1992
To what extent do the mechanisms generating different receptive field properties of neurons depend on each other? We investigated this question theoretically within the context of orientation and direction tuning of simple cells in the mammalian visual ...
Koch, Christof   +2 more
core   +1 more source

The Visual Mismatch Negativity Elicited with Visual Speech Stimuli

open access: yesFrontiers in Human Neuroscience, 2013
The visual mismatch negativity (vMMN), deriving from the brain’s response to stimulus deviance, is thought to be generated by the cortex that represents the stimulus. The vMMN response to visual speech stimuli was used in a study of the lateralization of
Benjamin T. Files   +3 more
doaj   +1 more source

Assessing differential effects of single and accelerated low‐frequency rTMS to the visual cortex on GABA and glutamate concentrations

open access: yesBrain and Behavior, 2020
Background The application of repetitive transcranial magnetic stimulation (rTMS) for therapeutic use in visual‐related disorders and its underlying mechanisms in the visual cortex is under‐investigated.
Sara A. Rafique, Jennifer K. E. Steeves
doaj   +1 more source

Drawing the Representation [PDF]

open access: yes
This article argues that the Representation is drawn by the perceiver: that it does not arrive at the visual cortex fully-formed.
Halliday, Albert
core  

Latency and Selectivity of Single Neurons Indicate Hierarchical Processing in the Human Medial Temporal Lobe [PDF]

open access: yes, 2008
Neurons in the temporal lobe of both monkeys and humans show selective responses to classes of visual stimuli and even to specific individuals. In this study, we investigate the latency and selectivity of visually responsive neurons recorded from ...
Cerf, Moran   +6 more
core   +1 more source

Inter-areal coordination of columnar architectures during visual cortical development

open access: yes, 2008
The occurrence of a critical period of plasticity in the visual cortex has long been established, yet its function in normal development is not fully understood.
Adams   +59 more
core   +2 more sources

Surface-Based Analyses of Anatomical Properties of the Visual Cortex in Macular Degeneration.

open access: yesPLoS ONE, 2016
IntroductionMacular degeneration (MD) can cause a central visual field defect. In a previous study, we found volumetric reductions along the entire visual pathways of MD patients, possibly indicating degeneration of inactive neuronal tissue.
Doety Prins   +7 more
doaj   +1 more source

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