Paying attention to correlated neural activity
... the effect of attention on neuronal responses. For instance, one could alternate between a coarsediscrimination task in which the monkey is trained to discriminate between 0 and 180 degrees and a fine-discrimination task in which the monkey must discriminate between –3 and +3 degrees (Fig. 1c). In t ...
... the effect of attention on neuronal responses. For instance, one could alternate between a coarsediscrimination task in which the monkey is trained to discriminate between 0 and 180 degrees and a fine-discrimination task in which the monkey must discriminate between –3 and +3 degrees (Fig. 1c). In t ...
Power of Music
... should be noted that musical perception is experienced on many levels, and the indi-vidual receiving the therapy does not need to be highly trained and experienced in music to benefit from the protocols. Cognition techniques engage many areas of the brain; an especially complex neural network provid ...
... should be noted that musical perception is experienced on many levels, and the indi-vidual receiving the therapy does not need to be highly trained and experienced in music to benefit from the protocols. Cognition techniques engage many areas of the brain; an especially complex neural network provid ...
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... projection. The contralateral visuotectal projection was studied in Xenopus laevis which had been reared in darkness from before the onset of visual function. The projection mapped electrophysiologically at metamorphic climax, or in postmetamorphic juveniles, showed a normal retinotopic topography. ...
... projection. The contralateral visuotectal projection was studied in Xenopus laevis which had been reared in darkness from before the onset of visual function. The projection mapped electrophysiologically at metamorphic climax, or in postmetamorphic juveniles, showed a normal retinotopic topography. ...
A Self-Organizing Neural Network That Learns to
... stage of visual processing. (Marshall, 1991) describes evidence that suggests that the same early processing mechanisms maintain a representation of temporarily occluded objects for some amount of time after they have disappeared behind an occluder, and that these representations of invisible object ...
... stage of visual processing. (Marshall, 1991) describes evidence that suggests that the same early processing mechanisms maintain a representation of temporarily occluded objects for some amount of time after they have disappeared behind an occluder, and that these representations of invisible object ...
An Extended Model for Stimulus Onset Asynchrony (SOA) in Stroop
... a target, while that from another dimension (word) becomes a distractor. The control-condition cards were the same as the experimental cards except that the text was replaced with colored blocks. The results showed that there was a significant (almost twice) difference in response time per item in t ...
... a target, while that from another dimension (word) becomes a distractor. The control-condition cards were the same as the experimental cards except that the text was replaced with colored blocks. The results showed that there was a significant (almost twice) difference in response time per item in t ...
Impact on Perception, Attention, and Memory
... awareness. Emotion’s facilitation of awareness also extends to the perception of nonemotional stimuli in the vicinity of emotional stimuli. This was demonstrated using an attentional cuing paradigm (Posner, 1980) in which fearful or neutral faces were used to cue the location of a subsequent target ...
... awareness. Emotion’s facilitation of awareness also extends to the perception of nonemotional stimuli in the vicinity of emotional stimuli. This was demonstrated using an attentional cuing paradigm (Posner, 1980) in which fearful or neutral faces were used to cue the location of a subsequent target ...
Paying attention to correlated neural activity
... the effect of attention on neuronal responses. For instance, one could alternate between a coarsediscrimination task in which the monkey is trained to discriminate between 0 and 180 degrees and a fine-discrimination task in which the monkey must discriminate between –3 and +3 degrees (Fig. 1c) ...
... the effect of attention on neuronal responses. For instance, one could alternate between a coarsediscrimination task in which the monkey is trained to discriminate between 0 and 180 degrees and a fine-discrimination task in which the monkey must discriminate between –3 and +3 degrees (Fig. 1c) ...
Document
... spatio-temporal statistics of natural visual inputs to be able to associate together different exemplars of the same stimulus or object which will tend to occur in temporal proximity. In this paper the different exemplars of a stimulus are the same stimulus in different positions. First it is shown ...
... spatio-temporal statistics of natural visual inputs to be able to associate together different exemplars of the same stimulus or object which will tend to occur in temporal proximity. In this paper the different exemplars of a stimulus are the same stimulus in different positions. First it is shown ...
Lightweight Authentication Protocol For Smart Dust
... where its leading and trailing edges makes “differences” with the background When an object gets closer to the viewer or moves farther away That it can track an object through varying light sources or changes in size ...
... where its leading and trailing edges makes “differences” with the background When an object gets closer to the viewer or moves farther away That it can track an object through varying light sources or changes in size ...
Visual Fields in Ophthalmology - New York Eye and Ear Infirmary
... • Target moved from nonseeing area to seeing area ...
... • Target moved from nonseeing area to seeing area ...
Perceptual Expectation Evokes Category
... Helmholtz (1867/1910) argued that observers routinely generate hypotheses about what they expect to see, based on prior experience and current goals. These expectations can be rich with spatial, featural, and object-specific content. Many studies have demonstrated that perception is facilitated when ...
... Helmholtz (1867/1910) argued that observers routinely generate hypotheses about what they expect to see, based on prior experience and current goals. These expectations can be rich with spatial, featural, and object-specific content. Many studies have demonstrated that perception is facilitated when ...
5. Discussion - UvA-DARE - University of Amsterdam
... stimuli. Orientation-tuned cells can increase their ability of discriminating two very similar orientations by sharpening their tuning curve, if the steepest part of their tuning curves falls between the to be discriminated stimuli, and thereby increases the difference in their response amplitude to ...
... stimuli. Orientation-tuned cells can increase their ability of discriminating two very similar orientations by sharpening their tuning curve, if the steepest part of their tuning curves falls between the to be discriminated stimuli, and thereby increases the difference in their response amplitude to ...
Visuospatial processing and the right
... Although the left hemisphere seems driven to interpret events, the right hemisphere shows no such tendency. This difference in cognitive styles can be observed in the performances of the two hemispheres in recognition memory tasks. When asked to decide whether a stimulus was presented in a study set, ...
... Although the left hemisphere seems driven to interpret events, the right hemisphere shows no such tendency. This difference in cognitive styles can be observed in the performances of the two hemispheres in recognition memory tasks. When asked to decide whether a stimulus was presented in a study set, ...
Sauve CVE 2015 - Calgary Vision Event
... optokinetic reflex (e.g. subject motionless, visual field moves.... nystagmus; e.g. watching scenery from car. Optokinetic reflex dominates eye stabilization in slow head movements (e.g. up to 1 Hz); VOR dominates as head acceleration becomes more rapid ( >1 Hz). post-rotatory nystagmus: vestibular ...
... optokinetic reflex (e.g. subject motionless, visual field moves.... nystagmus; e.g. watching scenery from car. Optokinetic reflex dominates eye stabilization in slow head movements (e.g. up to 1 Hz); VOR dominates as head acceleration becomes more rapid ( >1 Hz). post-rotatory nystagmus: vestibular ...
A non-invasive method to relate the timing of neural activity to white
... pseudorandom sequence of prosaccade, antisaccade, and fixation trials. Prosaccade trials required participants to make a saccade to a suddenly appearing visual stimulus, and antisaccade trials required participants to make a saccade in the opposite direction, to a stimulus that remained on the screen ...
... pseudorandom sequence of prosaccade, antisaccade, and fixation trials. Prosaccade trials required participants to make a saccade to a suddenly appearing visual stimulus, and antisaccade trials required participants to make a saccade in the opposite direction, to a stimulus that remained on the screen ...
Uncomfortable images produce non-sparse responses in a model of
... attacks and epileptic seizures, will produce excessively large, non-sparse responses in the primary visual cortex. To do this, we apply and modify the techniques pioneered by Field [4] in the analysis of the visual system’s responses to natural images. Field argued that the goal of sensory coding is ...
... attacks and epileptic seizures, will produce excessively large, non-sparse responses in the primary visual cortex. To do this, we apply and modify the techniques pioneered by Field [4] in the analysis of the visual system’s responses to natural images. Field argued that the goal of sensory coding is ...
Meaningful auditory information enhances perception of visual
... could be reduction of temporal uncertainty. Although they were uninformative in their own right, the synchronized auditory signals could have served as temporal references, thereby narrowing the uncertainty window about the timing of the visual signals (and helping to ignore the noise signals). As t ...
... could be reduction of temporal uncertainty. Although they were uninformative in their own right, the synchronized auditory signals could have served as temporal references, thereby narrowing the uncertainty window about the timing of the visual signals (and helping to ignore the noise signals). As t ...
Responses to Rare Visual Target and Distractor Stimuli Using Event
... 1997; Knight and Nakada 1998). This suggests that some portion of the neural activity evoked by these stimuli is not observed using fMRI. In a previous study (Clark et al. 1998), we introduced a method for performing event-related fMRI using multiple regression, which has shown greater sensitivity t ...
... 1997; Knight and Nakada 1998). This suggests that some portion of the neural activity evoked by these stimuli is not observed using fMRI. In a previous study (Clark et al. 1998), we introduced a method for performing event-related fMRI using multiple regression, which has shown greater sensitivity t ...
Attention induces synchronization-based response gain in steady
... that is especially effective for increasing the salience of high-contrast stimuli. This would complement the attentional modulations of neuronal spike rates, which may be potentially limited by response saturation at high contrast. Our strategy for investigating the effects of attention on the coher ...
... that is especially effective for increasing the salience of high-contrast stimuli. This would complement the attentional modulations of neuronal spike rates, which may be potentially limited by response saturation at high contrast. Our strategy for investigating the effects of attention on the coher ...
Topographic maps in human frontal and parietal cortex
... parietal and frontal areas, each containing a topographic map of visual space. In this review, we summarize the anatomical locations, visual field organization, and functional specialization of these new parietal and frontal topographic cortical areas. The study of higher-order topographic cortex pr ...
... parietal and frontal areas, each containing a topographic map of visual space. In this review, we summarize the anatomical locations, visual field organization, and functional specialization of these new parietal and frontal topographic cortical areas. The study of higher-order topographic cortex pr ...
T2 - Center for Neural Basis of Cognition
... Remapping in humans produces activity in the hemisphere ipsilateral to the stimulus. Remapped activity is present in human parietal, extrastriate and striate cortex. Remapped visual signals are more prevalent at higher levels of the visual system hierarchy. Remapping occurs in parietal and visual co ...
... Remapping in humans produces activity in the hemisphere ipsilateral to the stimulus. Remapped activity is present in human parietal, extrastriate and striate cortex. Remapped visual signals are more prevalent at higher levels of the visual system hierarchy. Remapping occurs in parietal and visual co ...
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... The potential relationship between the type of representation of objects (e.g. viewer-centered) and how the organism may interact with those objects was further examined by reference to neurons in the STS which are selective for the sight of particular reaching actions (e.g. Perrett et al., 1989). I ...
... The potential relationship between the type of representation of objects (e.g. viewer-centered) and how the organism may interact with those objects was further examined by reference to neurons in the STS which are selective for the sight of particular reaching actions (e.g. Perrett et al., 1989). I ...
Magnetoencephalographic Investigation of Human Cortical Area V1
... contrasts used. Red and green gratings of 100% contrast (Lmax 2 Lmin/Lmax 1 Lmin) were generated independently and combined 180° out of phase to produce physically isoluminant red/green gratings. For all observers there were no stimulus conditions for which the point of perceptual isoluminance, dete ...
... contrasts used. Red and green gratings of 100% contrast (Lmax 2 Lmin/Lmax 1 Lmin) were generated independently and combined 180° out of phase to produce physically isoluminant red/green gratings. For all observers there were no stimulus conditions for which the point of perceptual isoluminance, dete ...
Computational modeling of responses in human visual
... Figure 1. Visual field maps in occipital cortex. The small inset at the upper right is a smoothed rendering of the surface boundary between gray matter and white matter in a right hemisphere, and ...
... Figure 1. Visual field maps in occipital cortex. The small inset at the upper right is a smoothed rendering of the surface boundary between gray matter and white matter in a right hemisphere, and ...
Visual N1
The visual N1 is a visual evoked potential, a type of event-related electrical potential (ERP), that is produced in the brain and recorded on the scalp. The N1 is so named to reflect the polarity and typical timing of the component. The ""N"" indicates that the polarity of the component is negative with respect to an average mastoid reference. The ""1"" originally indicated that it was the first negative-going component, but it now better indexes the typical peak of this component, which is around 150 to 200 milliseconds post-stimulus. The N1 deflection may be detected at most recording sites, including the occipital, parietal, central, and frontal electrode sites. Although, the visual N1 is widely distributed over the entire scalp, it peaks earlier over frontal than posterior regions of the scalp, suggestive of distinct neural and/or cognitive correlates. The N1 is elicited by visual stimuli, and is part of the visual evoked potential – a series of voltage deflections observed in response to visual onsets, offsets, and changes. Both the right and left hemispheres generate an N1, but the laterality of the N1 depends on whether a stimulus is presented centrally, laterally, or bilaterally. When a stimulus is presented centrally, the N1 is bilateral. When presented laterally, the N1 is larger, earlier, and contralateral to the visual field of the stimulus. When two visual stimuli are presented, one in each visual field, the N1 is bilateral. In the latter case, the N1’s asymmetrical skewedness is modulated by attention. Additionally, its amplitude is influenced by selective attention, and thus it has been used to study a variety of attentional processes.