Summary - VU Research Portal
... grouping. After the initial figure-ground structure is established in the visual scene, an object can be selected by attention to complete the perceptual grouping process. We investigated the time course of perceptual grouping of two-dimensional objects and showed that it is associated with the grad ...
... grouping. After the initial figure-ground structure is established in the visual scene, an object can be selected by attention to complete the perceptual grouping process. We investigated the time course of perceptual grouping of two-dimensional objects and showed that it is associated with the grad ...
Visual vs. Language-based Thinking
... by the mirror neuron system. From a cognitive load perspective, this might benefit learning by leaving more working memory capacity available for processes such as elaboration or reflection on intentions of actions, compared to static visualizations. However, we do not know whether and how the mirro ...
... by the mirror neuron system. From a cognitive load perspective, this might benefit learning by leaving more working memory capacity available for processes such as elaboration or reflection on intentions of actions, compared to static visualizations. However, we do not know whether and how the mirro ...
From Vision to Movement
... the same cell. This generally needs to be done in association with some behavioral paradigm that dissociates vision from action in time and/or space. A simple way to dissociate vision from action in time is to require a delay (usually in the order of a second for neurophysiology which records neuron ...
... the same cell. This generally needs to be done in association with some behavioral paradigm that dissociates vision from action in time and/or space. A simple way to dissociate vision from action in time is to require a delay (usually in the order of a second for neurophysiology which records neuron ...
Review 2 - Texas A&M University
... square stimulus creates a square image on the retina. However, this image could also have been created by the other two shapes and many other stimuli. This is why we say that the image on the retina is ambiguous. ...
... square stimulus creates a square image on the retina. However, this image could also have been created by the other two shapes and many other stimuli. This is why we say that the image on the retina is ambiguous. ...
Document
... Biological: the position invariance property of many higherlevel visual cortex neurons. ...
... Biological: the position invariance property of many higherlevel visual cortex neurons. ...
Visual Field and the Human Visual System
... and Fox in St. Louis (green circles). The areas of activation in the extrastriate cortex almost superimpose. ...
... and Fox in St. Louis (green circles). The areas of activation in the extrastriate cortex almost superimpose. ...
The outer layer of the cerebral cortex is divided into different areas
... The outer layer of the cerebral cortex is divided into different areas specialized for detecting and processing sensory signals from the eyes and ears and from receptors for touch, taste, and smell. Differences between these sensory areas may reflect variations in the rate of evolution of the five s ...
... The outer layer of the cerebral cortex is divided into different areas specialized for detecting and processing sensory signals from the eyes and ears and from receptors for touch, taste, and smell. Differences between these sensory areas may reflect variations in the rate of evolution of the five s ...
Chapter 6: Summary and Discussion
... propose that the propagation of enhanced responses in early visual cortex (including V1) can explain the spread of attention the psychological level of description. In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we vari ...
... propose that the propagation of enhanced responses in early visual cortex (including V1) can explain the spread of attention the psychological level of description. In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we vari ...
Nature Reviews Neuroscience Highlight
... categorize the stimuli set as either cat or dog. Freedman et al. then looked for neurons that reflected the different categories. A population of neurons in the lateral prefrontal cortex reflected the category of the visual stimuli. A typical neuron was more active in response to one of the categori ...
... categorize the stimuli set as either cat or dog. Freedman et al. then looked for neurons that reflected the different categories. A population of neurons in the lateral prefrontal cortex reflected the category of the visual stimuli. A typical neuron was more active in response to one of the categori ...
primary visual cortex - UBC Psychology`s Research Labs
... segregated into distinct pathways that project to areas of the secondary visual cortex and, then, the association visual cortex. ...
... segregated into distinct pathways that project to areas of the secondary visual cortex and, then, the association visual cortex. ...
Revision material
... Write short notes on the electrical time constant of a membrane. What controls the survival of newly generated nerve cells? How do cells in the ventral spinal cord respond to differing levels of Shh? The genomic sequence of the “AMPA” receptor encodes a Ca2+ channel but most AMPA receptors are only ...
... Write short notes on the electrical time constant of a membrane. What controls the survival of newly generated nerve cells? How do cells in the ventral spinal cord respond to differing levels of Shh? The genomic sequence of the “AMPA” receptor encodes a Ca2+ channel but most AMPA receptors are only ...
New clues to the location of visual consciousness
... eyes can suffer from binocular rivalry. They generally cope with this condition in one of two ways. They either rely on the view from a single eye or they use each eye for a different purpose, such as close and far vision. The question of which neurons are responsible for this effect is a matter of ...
... eyes can suffer from binocular rivalry. They generally cope with this condition in one of two ways. They either rely on the view from a single eye or they use each eye for a different purpose, such as close and far vision. The question of which neurons are responsible for this effect is a matter of ...
A1982ND73700001
... monograph about the evoked potentials (EPs) in the literature at all. Later, throughout the world, a tremendous surge of work in the field of EPs brought extensive knowledge of the physiology and pathophysiology of the human brain and even knowledge about the mechanisms of the mind. The work is stil ...
... monograph about the evoked potentials (EPs) in the literature at all. Later, throughout the world, a tremendous surge of work in the field of EPs brought extensive knowledge of the physiology and pathophysiology of the human brain and even knowledge about the mechanisms of the mind. The work is stil ...
Theory of Vision: What We Can Easily See
... also arrows that bring direction and motion to the poster. This keeps the eyes moving back an forth across the page. The bold black text boxes keep your eyes centered on the page. The dark irregular shape of the monkey then attracts the viewer. Color, motion, then shape. POSTED BY BAILEY KIMA ...
... also arrows that bring direction and motion to the poster. This keeps the eyes moving back an forth across the page. The bold black text boxes keep your eyes centered on the page. The dark irregular shape of the monkey then attracts the viewer. Color, motion, then shape. POSTED BY BAILEY KIMA ...
Document
... hippocampal subdivisions that also receive input directly from the cIPL. (2) To the posterior parahippocampal cortex (areas TF, TH and TFO), which projects in turn to the CA1/prosubicular subdivisions of the ...
... hippocampal subdivisions that also receive input directly from the cIPL. (2) To the posterior parahippocampal cortex (areas TF, TH and TFO), which projects in turn to the CA1/prosubicular subdivisions of the ...
Lecture 2 - Computer Science
... •Vision seems easy. It is effortless for us. •Building machine vision systems is hard. Machines still cannot see. •Understanding how the brain processes visual information is hard. We still understand only the most basic computations. ...
... •Vision seems easy. It is effortless for us. •Building machine vision systems is hard. Machines still cannot see. •Understanding how the brain processes visual information is hard. We still understand only the most basic computations. ...
Computational vision --- a window to our brain
... Focus on segmentation problem in vision --- region segmentation ...
... Focus on segmentation problem in vision --- region segmentation ...
Computational vision --- a window to our brain
... Focus on segmentation problem in vision --- region segmentation ...
... Focus on segmentation problem in vision --- region segmentation ...
view - Scan. Vet. Press
... synaptic input from many neurons in the lateral geniculate nucleus. The neurons connected to a particular cortical cell have circular receptive fields that are linearly arranged and of the same type. This gives the cortical cell an oblong receptive field, with parallel regions where illumination eit ...
... synaptic input from many neurons in the lateral geniculate nucleus. The neurons connected to a particular cortical cell have circular receptive fields that are linearly arranged and of the same type. This gives the cortical cell an oblong receptive field, with parallel regions where illumination eit ...
Summary
... suppression of activity evoked by the target curve which was reversed later in time. We conclude that attentional processing differs between the difficulty levels. In the easy and intermediate condition we see the early attentional modulation specific to the positional cue (curve tracing) and in the ...
... suppression of activity evoked by the target curve which was reversed later in time. We conclude that attentional processing differs between the difficulty levels. In the easy and intermediate condition we see the early attentional modulation specific to the positional cue (curve tracing) and in the ...
Slide ()
... to the optic chiasm, where fibers from the nasal hemiretina cross to the opposite hemisphere. Fibers from the temporal hemiretina stay on the same side, joining the fibers from the nasal hemiretina of the contralateral eye to form the optic tract. The optic tract carries information from the opposit ...
... to the optic chiasm, where fibers from the nasal hemiretina cross to the opposite hemisphere. Fibers from the temporal hemiretina stay on the same side, joining the fibers from the nasal hemiretina of the contralateral eye to form the optic tract. The optic tract carries information from the opposit ...
Slide ()
... to the optic chiasm, where fibers from the nasal hemiretina cross to the opposite hemisphere. Fibers from the temporal hemiretina stay on the same side, joining the fibers from the nasal hemiretina of the contralateral eye to form the optic tract. The optic tract carries information from the opposit ...
... to the optic chiasm, where fibers from the nasal hemiretina cross to the opposite hemisphere. Fibers from the temporal hemiretina stay on the same side, joining the fibers from the nasal hemiretina of the contralateral eye to form the optic tract. The optic tract carries information from the opposit ...
The effect of visual experience on the development of the mirror
... sulcus and the inferior parietal lobule. These same areas showed significant activations also during the tactile and visual angle discrimination conditions. As expected, auditory, visual and tactile primary sensory regions also were activated during the respective conditions. Ventral occipital brain ...
... sulcus and the inferior parietal lobule. These same areas showed significant activations also during the tactile and visual angle discrimination conditions. As expected, auditory, visual and tactile primary sensory regions also were activated during the respective conditions. Ventral occipital brain ...
P200
In neuroscience, the visual P200 or P2 is a waveform component or feature of the event-related potential (ERP) measured at the human scalp. Like other potential changes measurable from the scalp, this effect is believed to reflect the post-synaptic activity of a specific neural process. The P2 component, also known as the P200, is so named because it is a positive going electrical potential that peaks at about 200 milliseconds (varying between about 150 and 275 ms) after the onset of some external stimulus . The distribution of this component in the brain, as measured by electrodes placed across the scalp, is located around the centro-frontal and the parieto-occipital region. It is generally found to be maximal around the vertex (frontal region) of the scalp, however there have been some topographical differences noted in ERP studies of the P2 in different experimental conditions.Research on the visual P2 is at an early stage compared to other more established ERP components and there is much that we still do not know about it. Part of the difficulty of clearly characterizing this component is that it appears to be modulated by a large and diverse number of cognitive tasks. Functionally, there seems to be partial agreement amongst researchers in the field of cognitive neuroscience that the P2 represents some aspect of higher-order perceptual processing, modulated by attention. It is known that the P2 is typically elicited as part of the normal response to visual stimuli and has been studied in relation to visual search and attention, language context information, and memory and repetition effects. The amplitude of the peak of the waveform may be modulated by many different aspects of visual stimuli, which allow it to be used for studies of visual cognition and disease. In general, the P2 may be a part of cognitive matching system that compares sensory inputs with stored memory.