A simultaneous ERP/fMRI investigation of the P300 aging effect
... al., 2008; Solbakk et al., 2008). Because elderly participants are typically found to perform the oddball task at a comparable level with younger participants, the differences in P300 topography have been proposed to represent the compensatory activation of additional neural networks. Fabiani et al. ...
... al., 2008; Solbakk et al., 2008). Because elderly participants are typically found to perform the oddball task at a comparable level with younger participants, the differences in P300 topography have been proposed to represent the compensatory activation of additional neural networks. Fabiani et al. ...
Role of Feedforward and Feedback Projections in Figure
... stimulus evoked response of a cell. The prominence of contextual information processing is reflected by the fact that the majority of neurons in the primary visual cortex are sensitive to such contextual influences from surrounding regions. Surrounding stimuli outside the classical receptive field d ...
... stimulus evoked response of a cell. The prominence of contextual information processing is reflected by the fact that the majority of neurons in the primary visual cortex are sensitive to such contextual influences from surrounding regions. Surrounding stimuli outside the classical receptive field d ...
Mapping Retinotopic Structure in Mouse Visual Cortex with Optical
... T welve-bit digitized camera data were range-fitted such that for the single-condition maps the 1 or 3% most responsive pixels (least responsive pixels) of the entire set of images were set to black (white) for all DC -corrected or high-pass-filtered images, respectively. To avoid erroneous DC corre ...
... T welve-bit digitized camera data were range-fitted such that for the single-condition maps the 1 or 3% most responsive pixels (least responsive pixels) of the entire set of images were set to black (white) for all DC -corrected or high-pass-filtered images, respectively. To avoid erroneous DC corre ...
Visual and presaccadic activity in area 8Ar of the macaque monkey
... and presented the visual stimuli. The screen was positioned 100 cm from the animals’ eyes. A ...
... and presented the visual stimuli. The screen was positioned 100 cm from the animals’ eyes. A ...
Visual Fields in Ophthalmology - New York Eye and Ear Infirmary
... 2b. Monocular field defects may occur in each eye, masquerading as a chiasmal or retrochiasmal problem ...
... 2b. Monocular field defects may occur in each eye, masquerading as a chiasmal or retrochiasmal problem ...
The Influence of Target Properties and the Possible
... from the fovea. This function is actually U-shaped, meaning that the shortest latencies would be for targets within about 2° and 10° from the fovea and relatively longer ones within 1° and 2° (Liversedge, Gilchrist, & Everling, 2011). Target location probabilities (Liu et al., 2010) and attentional ...
... from the fovea. This function is actually U-shaped, meaning that the shortest latencies would be for targets within about 2° and 10° from the fovea and relatively longer ones within 1° and 2° (Liversedge, Gilchrist, & Everling, 2011). Target location probabilities (Liu et al., 2010) and attentional ...
Chapter 29 - krigolson teaching
... feedback to the brain from the peripheral proprioceptors in the eye muscles that could inform the brain that the eye is moving. This is unlikely because both the receptive field shifts and the perceptual compression begin even before the eye moves, and the cortical representation of eye position lag ...
... feedback to the brain from the peripheral proprioceptors in the eye muscles that could inform the brain that the eye is moving. This is unlikely because both the receptive field shifts and the perceptual compression begin even before the eye moves, and the cortical representation of eye position lag ...
Projections from the superior temporal sulcus to the agranular frontal
... Several electrophysiological studies have shown that neurons in area STP have complex sensory properties. Firstly, although STP neurons are predominantly purely visual, a signi®cant proportion of them have also somatosensory and/or auditory responses (Bruce et al., 1981; Bayliss et al., 1987). Secon ...
... Several electrophysiological studies have shown that neurons in area STP have complex sensory properties. Firstly, although STP neurons are predominantly purely visual, a signi®cant proportion of them have also somatosensory and/or auditory responses (Bruce et al., 1981; Bayliss et al., 1987). Secon ...
What insights can fMRI offer into the structure and function of mid-tier visual areas?
... Introduction Our understanding of the human visual system—from the delineation of regions containing different spatial maps of the visual world to our understanding of just how distributed information processing is—would be far behind current levels without functional magnetic resonance imaging (fMR ...
... Introduction Our understanding of the human visual system—from the delineation of regions containing different spatial maps of the visual world to our understanding of just how distributed information processing is—would be far behind current levels without functional magnetic resonance imaging (fMR ...
Stop Using Introspection to Gather Data for the Design of... Modeling and Spatial Assistance
... On the one hand, nowadays almost everyone believes that the visual system is a distinct input-module of the mind. But it has been frequently argued that visual mental imagery, a purely mental process, involves the resources of the visual module for the purposes of thinking and reasoning. Regardless ...
... On the one hand, nowadays almost everyone believes that the visual system is a distinct input-module of the mind. But it has been frequently argued that visual mental imagery, a purely mental process, involves the resources of the visual module for the purposes of thinking and reasoning. Regardless ...
Abstract of “Primate frontal eye fields mediate spatial attention in
... out irrelevant information and to attend to information that is of benefit and interest. Generally, attention is thought to include the following components: working memory, competitive selection, top-down signal sensitivity control, and saliency filters, which select sensory information for the pro ...
... out irrelevant information and to attend to information that is of benefit and interest. Generally, attention is thought to include the following components: working memory, competitive selection, top-down signal sensitivity control, and saliency filters, which select sensory information for the pro ...
Segregation and convergence of specialised pathways in
... at higher levels of processing, or are they in turn combined and repackaged? To examine this question we have injected distinct orthograde tracers into the functionally distinct areas V4 and V5 of one hemisphere in 3 macaque monkeys (Macacafascicularis). V4 is known to receive input from both thin s ...
... at higher levels of processing, or are they in turn combined and repackaged? To examine this question we have injected distinct orthograde tracers into the functionally distinct areas V4 and V5 of one hemisphere in 3 macaque monkeys (Macacafascicularis). V4 is known to receive input from both thin s ...
Visual areas and spatial summation in human visual cortex
... (Wandell, 1999). The data in this figure represent the average of five separate scans. To emphasize the dorsal activation, the overlay is shown only for measurements that are located near the transverse occipital sulcus (TOS) and correlated with the stimulus at a level of at least 0.35. The eccentri ...
... (Wandell, 1999). The data in this figure represent the average of five separate scans. To emphasize the dorsal activation, the overlay is shown only for measurements that are located near the transverse occipital sulcus (TOS) and correlated with the stimulus at a level of at least 0.35. The eccentri ...
The functional organization of the intraparietal sulcus in humans and
... healthy persons showed that an area in anterior IPS is involved in a tactile shape-processing network when subjects discriminate different objects according to changes in their 3D structure (Bodegard et al. 2001). Jäncke et al. (2001) also found activations in anterior (and posterior) IPS when subje ...
... healthy persons showed that an area in anterior IPS is involved in a tactile shape-processing network when subjects discriminate different objects according to changes in their 3D structure (Bodegard et al. 2001). Jäncke et al. (2001) also found activations in anterior (and posterior) IPS when subje ...
Document
... The effects of cluttered environments are investigated on the performance of a hierarchical multilayer model of invariant object recognition in the visual system (VisNet) that employs learning rules that utilise a trace of previous neural activity. This class of model relies on the spatio-temporal s ...
... The effects of cluttered environments are investigated on the performance of a hierarchical multilayer model of invariant object recognition in the visual system (VisNet) that employs learning rules that utilise a trace of previous neural activity. This class of model relies on the spatio-temporal s ...
What can mice tell us about how vision works?
... garnered much attention over the years [1]. The longstanding emphasis stems from the fact that many mammals, including humans, rely on vision as their primary sense to evaluate their surroundings and guide their behavior. For more than a century, animal studies of visual system structure and functio ...
... garnered much attention over the years [1]. The longstanding emphasis stems from the fact that many mammals, including humans, rely on vision as their primary sense to evaluate their surroundings and guide their behavior. For more than a century, animal studies of visual system structure and functio ...
pdf file. - Harvard Vision Lab
... therefore keeping track of self-movement is a necessary part of analysing sensory input. One way in which the brain keeps track of self-movement is by monitoring an internal copy, or corollary discharge, of motor commands1–13. This concept could explain why we perceive a stable visual world despite ...
... therefore keeping track of self-movement is a necessary part of analysing sensory input. One way in which the brain keeps track of self-movement is by monitoring an internal copy, or corollary discharge, of motor commands1–13. This concept could explain why we perceive a stable visual world despite ...
Nerve growth factor improves visual loss in childhood optic
... log-transformed to limit skewness. However, the statistical analysis produced similar results when using the original scale. Ordinal variables (i.e. presence of adverse events such as periocular pain, changes in pupillary responses, changes in visual field extension) were analysed by non-parametric t ...
... log-transformed to limit skewness. However, the statistical analysis produced similar results when using the original scale. Ordinal variables (i.e. presence of adverse events such as periocular pain, changes in pupillary responses, changes in visual field extension) were analysed by non-parametric t ...
Last Lecture http://www.umich.edu/~psycours/345/
... Function: Perimetric Map shows blindness in lower right quadrant of… ...
... Function: Perimetric Map shows blindness in lower right quadrant of… ...
Models of Information Processing in the Visual Cortex
... interest. If we ask a biologist to model the visual system, he will probably talk about neurons, dendrites and synapses. On the other hand, if we ask a mathematician to model the visual system, he will probably talk about variables, probabilities and differential equations. There are an almost infini ...
... interest. If we ask a biologist to model the visual system, he will probably talk about neurons, dendrites and synapses. On the other hand, if we ask a mathematician to model the visual system, he will probably talk about variables, probabilities and differential equations. There are an almost infini ...
Review The Neural Basis of Perceptual Learning
... cortical maps, in the temporal characteristics of neuronal responses, and in modulation of contextual influences. Top-down control of these representations suggests that learning involves an interaction between multiple cortical areas. Introduction Learning comes in many forms, some of which are exp ...
... cortical maps, in the temporal characteristics of neuronal responses, and in modulation of contextual influences. Top-down control of these representations suggests that learning involves an interaction between multiple cortical areas. Introduction Learning comes in many forms, some of which are exp ...