2320lecture22
... Neural Correlates of Selection • Results: Neurons in visual system respond vigorously to certain stimuli but are then sharply suppressed if a different stimulus is selected by attention • Interpretation: this selection might be a neural correlate of the perceptual suppression of unattended informat ...
... Neural Correlates of Selection • Results: Neurons in visual system respond vigorously to certain stimuli but are then sharply suppressed if a different stimulus is selected by attention • Interpretation: this selection might be a neural correlate of the perceptual suppression of unattended informat ...
Visual areas and spatial summation in human visual cortex
... field representations. The largest of these falls in posterior occipital cortex at the confluence of areas V1, V2 and V3. A second distinct central field representation Is visible at the fundus of the transverse occipital sulcus (TOS) where areas V3A and V3B are observed (Smith et al., 1998; Tootell ...
... field representations. The largest of these falls in posterior occipital cortex at the confluence of areas V1, V2 and V3. A second distinct central field representation Is visible at the fundus of the transverse occipital sulcus (TOS) where areas V3A and V3B are observed (Smith et al., 1998; Tootell ...
Features of Neuronal Synchrony in Mouse Visual Cortex
... Analysis of local field potentials LFPs consistently revealed the same temporal patterning as the unit activity. For all stimulus conditions, power spectra exhibited an oscillatory modulation at approximately 40 Hz and significant increases in power in the ␥-band during response periods as compared ...
... Analysis of local field potentials LFPs consistently revealed the same temporal patterning as the unit activity. For all stimulus conditions, power spectra exhibited an oscillatory modulation at approximately 40 Hz and significant increases in power in the ␥-band during response periods as compared ...
The Binding Problem
... of a square but are segregated from one another when they form components of different squares). Another important aspect of PG is its speed. When observers scan visual scenes they usuall make saccadic eye movements anywhere from one to four times a second, with the durati of visual fixation occasio ...
... of a square but are segregated from one another when they form components of different squares). Another important aspect of PG is its speed. When observers scan visual scenes they usuall make saccadic eye movements anywhere from one to four times a second, with the durati of visual fixation occasio ...
Touch lab
... Modulating the sense of touch • Does visual-tactile enhancement effect extend to: – Viewing other people’s bodies • Dependent variable: 2PDT estimate • (View object/view body) * +/- other factor – (self/other) • Look for interaction in 2x2 ANOVA • Counterbalancing very important: training effects • ...
... Modulating the sense of touch • Does visual-tactile enhancement effect extend to: – Viewing other people’s bodies • Dependent variable: 2PDT estimate • (View object/view body) * +/- other factor – (self/other) • Look for interaction in 2x2 ANOVA • Counterbalancing very important: training effects • ...
A Maximum-Likelihood Approach to Modeling Multisensory
... organism is faced with. As noted above, in a natural environment an individual is confronted with the task of discriminating between stimuli important for survival (”targets”) and stimuli that are irrelevant (”distractors”). Thus, an organism must not only keep up a high rate of detecting targets bu ...
... organism is faced with. As noted above, in a natural environment an individual is confronted with the task of discriminating between stimuli important for survival (”targets”) and stimuli that are irrelevant (”distractors”). Thus, an organism must not only keep up a high rate of detecting targets bu ...
mechanisms of visual attention in the human cortex
... using functional magnetic resonance imaging (Kastner et al 1997, 1998a). In these studies, subjects were presented with images of colorful, complex stimuli in four nearby locations of the upper right quadrant of the visual field while they maintained fixation. Fixation was ensured by having subjects ...
... using functional magnetic resonance imaging (Kastner et al 1997, 1998a). In these studies, subjects were presented with images of colorful, complex stimuli in four nearby locations of the upper right quadrant of the visual field while they maintained fixation. Fixation was ensured by having subjects ...
Sauve CVE 2015 - Calgary Vision Event
... Yves Sauvé, PhD, Associate Professor of Ophthalmology and Visual Sciences University of Alberta ...
... Yves Sauvé, PhD, Associate Professor of Ophthalmology and Visual Sciences University of Alberta ...
Human Anatomy, First Edition McKinley&O'Loughlin
... Special senses are considered exteroceptors because they usually interpret external stimuli. Also found in the mucous membranes that open to the outside of the body, such as the nasal cavity, oral cavity, vagina, and anal canal. ...
... Special senses are considered exteroceptors because they usually interpret external stimuli. Also found in the mucous membranes that open to the outside of the body, such as the nasal cavity, oral cavity, vagina, and anal canal. ...
Visual System Part 1 – Visual Perception
... These are significantly more likely to drive V1. – Selectivity for synchronous and burst events: Spikes arriving within 10 ms of one another are 5 times more likely to elicit an output, and even 12 times more likely to elicit a synchronous output. ...
... These are significantly more likely to drive V1. – Selectivity for synchronous and burst events: Spikes arriving within 10 ms of one another are 5 times more likely to elicit an output, and even 12 times more likely to elicit a synchronous output. ...
Ch03
... intensity of grating until person can just see it. • Calculate the contrast sensitivity by taking 1/threshold. • If threshold is low, person has high contrast sensitivity. ...
... intensity of grating until person can just see it. • Calculate the contrast sensitivity by taking 1/threshold. • If threshold is low, person has high contrast sensitivity. ...
chapter 6 vision
... The Structures & Functions of the Visual System • Processing by Retinal Interneurons – Horizontal Cells – form connections with photoreceptors and bipolar cells – Bipolar Cells • Receptive fields • Antagonistic center-surround organization • Lateral inhibition ...
... The Structures & Functions of the Visual System • Processing by Retinal Interneurons – Horizontal Cells – form connections with photoreceptors and bipolar cells – Bipolar Cells • Receptive fields • Antagonistic center-surround organization • Lateral inhibition ...
Topographic maps in human frontal and parietal cortex
... have recently been employed in conjunction with tasks that involve higher-order cognitive processes such as spatial attention, working memory, and planning and execution of saccadic eye movements. This approach has led to the discovery of multiple areas in human parietal and frontal areas, each cont ...
... have recently been employed in conjunction with tasks that involve higher-order cognitive processes such as spatial attention, working memory, and planning and execution of saccadic eye movements. This approach has led to the discovery of multiple areas in human parietal and frontal areas, each cont ...
Serre-Poggio_ACM_R2_finalSubmission
... representation of the image which facilitates recognition tolerant to image transformations. For instance, Logothetis and colleagues showed that monkeys could be trained to recognize paperclip-like wireframe objects at one specific location and scale [6]. After training, recordings in the IT cortex ...
... representation of the image which facilitates recognition tolerant to image transformations. For instance, Logothetis and colleagues showed that monkeys could be trained to recognize paperclip-like wireframe objects at one specific location and scale [6]. After training, recordings in the IT cortex ...
A multi-level account of selective attention
... 1999; Somers, Dale, Seiffert, and Tootell 1999) and stationary stimuli (Martinez et al. 1999). Even stronger evidence in support of early selection came from the subsequent demonstration of attention effects in the thalamus, i.e. the lateral geniculate nucleus (LGN) (O’Connor, Fukui, Pinsk, and Kast ...
... 1999; Somers, Dale, Seiffert, and Tootell 1999) and stationary stimuli (Martinez et al. 1999). Even stronger evidence in support of early selection came from the subsequent demonstration of attention effects in the thalamus, i.e. the lateral geniculate nucleus (LGN) (O’Connor, Fukui, Pinsk, and Kast ...
Information Optimization in Coupled Audio–Visual Cortical Maps Mehran Kardar A. Zee
... In the struggle of biological organisms to survive and reproduce, processing of information is of central importance. Sensory signals provide valuable information about the external world, such as the locations of predators and preys. Localization of sources is facilitated by topographic maps of neu ...
... In the struggle of biological organisms to survive and reproduce, processing of information is of central importance. Sensory signals provide valuable information about the external world, such as the locations of predators and preys. Localization of sources is facilitated by topographic maps of neu ...
TalkHumaine_grandjean
... are excited (visual+auditory) and their reaction time decreases with the increase of channels excited (when the stimuli are congruent). ...
... are excited (visual+auditory) and their reaction time decreases with the increase of channels excited (when the stimuli are congruent). ...
The Motor System of the Cortex and the Brain Stem
... primary visual cortex. Slide 3. From the primary visual cortex, there are two main pathways that process visual information. The dorsal pathway leads to the parietal cortex and processes information about location of objects with respect to fovea. Here cells have visual receptive fields that respond ...
... primary visual cortex. Slide 3. From the primary visual cortex, there are two main pathways that process visual information. The dorsal pathway leads to the parietal cortex and processes information about location of objects with respect to fovea. Here cells have visual receptive fields that respond ...
attention - CMU Graphics
... --feature-based and space-based attentions are very similar. -- space can be considered one of the feature -- may be spatial locations identified by the animal as behaviorally relevant based on color luminance. -- feature-similarity gain model responses would be enhanced for all neurons whose sensory ...
... --feature-based and space-based attentions are very similar. -- space can be considered one of the feature -- may be spatial locations identified by the animal as behaviorally relevant based on color luminance. -- feature-similarity gain model responses would be enhanced for all neurons whose sensory ...
Where is Pain Percieved?
... and the bilateral secondary (S2) somatosensory cortices were localized by analyzing the known pain-evoked (phase-locked) responses. Researchers found that pain induces strong and significant increases at gamma power of frequencies between 60-95 Hz in the contralateral (S1) cortex. The pain induced g ...
... and the bilateral secondary (S2) somatosensory cortices were localized by analyzing the known pain-evoked (phase-locked) responses. Researchers found that pain induces strong and significant increases at gamma power of frequencies between 60-95 Hz in the contralateral (S1) cortex. The pain induced g ...
phys chapter 51 [3-20
... power of lens; regulated by negative feedback mechanism that automatically adjusts refractive power of lens to achieve highest degree of visual acuity o When eyes suddenly change distance of fixation point, lens changes strength in proper direction to achieve new state of focus o Chromatic aberratio ...
... power of lens; regulated by negative feedback mechanism that automatically adjusts refractive power of lens to achieve highest degree of visual acuity o When eyes suddenly change distance of fixation point, lens changes strength in proper direction to achieve new state of focus o Chromatic aberratio ...
Attention maps in the brain - Site BU
... attentional spotlight, it takes a minimum of 200–250 milliseconds to shift from one target to another,57–59 thus implying that a full cycle of attention to two distinct objects should take 400 milliseconds or longer. We performed a series of experiments that demonstrate that spatial attention can be ...
... attentional spotlight, it takes a minimum of 200–250 milliseconds to shift from one target to another,57–59 thus implying that a full cycle of attention to two distinct objects should take 400 milliseconds or longer. We performed a series of experiments that demonstrate that spatial attention can be ...
T2 - Center for Neural Basis of Cognition
... Remapping occurs at early stages of the visual hierarchy. Corollary discharge has an impact far back into the system. Remapping implies widespread connectivity in which many neurons have rapid access to information well beyond the classical receptive field. Vision is an active process of building re ...
... Remapping occurs at early stages of the visual hierarchy. Corollary discharge has an impact far back into the system. Remapping implies widespread connectivity in which many neurons have rapid access to information well beyond the classical receptive field. Vision is an active process of building re ...
5. Discussion - UvA-DARE - University of Amsterdam
... a clear signature of sharpening; a stronger differentiation in response amplitude to the two locations and a steeper retinotopic gradient for the conditioned orientation compared to other orientations. Local inhibitory circuits are spatially restricted and can be differentially activated by top-down ...
... a clear signature of sharpening; a stronger differentiation in response amplitude to the two locations and a steeper retinotopic gradient for the conditioned orientation compared to other orientations. Local inhibitory circuits are spatially restricted and can be differentially activated by top-down ...
Document
... 1.2. The VisNet model In this section we give an overview of the VisNet model; full details are provided by Rolls and Milward (2000) and Wallis and Rolls (1997). In particular, the simulations performed in this paper use the latest version of the VisNet model (VisNet2) with the same parameter values ...
... 1.2. The VisNet model In this section we give an overview of the VisNet model; full details are provided by Rolls and Milward (2000) and Wallis and Rolls (1997). In particular, the simulations performed in this paper use the latest version of the VisNet model (VisNet2) with the same parameter values ...