Lightweight Authentication Protocol For Smart Dust
... GENERIC VISUAL PERCEPTION PROCESSOR (GVPP) Models the human perceptual process at the hardware level by mimicking the separate temporal and spatial functions of the eye-to-brain system Sees its environment as a stream of histograms regarding the location and velocity of objects Solve pattern ...
... GENERIC VISUAL PERCEPTION PROCESSOR (GVPP) Models the human perceptual process at the hardware level by mimicking the separate temporal and spatial functions of the eye-to-brain system Sees its environment as a stream of histograms regarding the location and velocity of objects Solve pattern ...
Local Field Potential in the Visual System
... VEPs invariably accompany spiking activity in response to visually presented stimuli, not only in V1 but also for other brain regions that are part of the visual system, including the extrastriate visual cortex, the inferior temporal and parietal cortices, as well as certain areas of the prefrontal ...
... VEPs invariably accompany spiking activity in response to visually presented stimuli, not only in V1 but also for other brain regions that are part of the visual system, including the extrastriate visual cortex, the inferior temporal and parietal cortices, as well as certain areas of the prefrontal ...
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 ...
PowerPoint Slides - Portland State University
... – Does this provide evidence that the auditory system implements a progressive, “efficient” encoding of vocalizations? ...
... – Does this provide evidence that the auditory system implements a progressive, “efficient” encoding of vocalizations? ...
Optometric Management Of A Patient With Parietal Lobe Injury
... the idea of a complex meaningful motor response to sensory and spatial stimuli.16 This is distinct from the frontal lobes, that are more involved in the actual execution of a given task.18 The non-dominant lobe is thought to be more responsible for visual-spatial tasks.16 Typically, those with damag ...
... the idea of a complex meaningful motor response to sensory and spatial stimuli.16 This is distinct from the frontal lobes, that are more involved in the actual execution of a given task.18 The non-dominant lobe is thought to be more responsible for visual-spatial tasks.16 Typically, those with damag ...
phys chapter 51 [3-20
... o Voluntary fixation movements controlled by cortical field located bilaterally in premotor cortical regions of frontal lobes; bilateral dysfunction or destruction makes difficult for person to unlock eyes from one point of fixation and move them to another point; usually necessary to blink or put h ...
... o Voluntary fixation movements controlled by cortical field located bilaterally in premotor cortical regions of frontal lobes; bilateral dysfunction or destruction makes difficult for person to unlock eyes from one point of fixation and move them to another point; usually necessary to blink or put h ...
Hafiz Noordin Term Paper - Engineering Computing Facility
... validity of assumptions. In the case of a Hebb-based model such as Topographica, it must be investigated whether or not it is sufficient to consider this strict local learning rule, in which only pre- and postsynaptic elements are involved [10]. It may be possible that non-local effects should be in ...
... validity of assumptions. In the case of a Hebb-based model such as Topographica, it must be investigated whether or not it is sufficient to consider this strict local learning rule, in which only pre- and postsynaptic elements are involved [10]. It may be possible that non-local effects should be in ...
Representation of naturalistic image structure in the primate visual
... Critical to Julesz’ framing of the problem was the desire for a minimal set of statistics, as well as the plan to experimentally validate the model by seeking perceptual counter-examples. Julesz and colleagues initially thought that pairwise statistics were sufficient (Julesz et al., 1973), but then ...
... Critical to Julesz’ framing of the problem was the desire for a minimal set of statistics, as well as the plan to experimentally validate the model by seeking perceptual counter-examples. Julesz and colleagues initially thought that pairwise statistics were sufficient (Julesz et al., 1973), but then ...
Gestalt Issues in Modern Neuroscience
... about the world (Metzger 1953). The second mode reflects a modifying influence of the visual input by higher-order cognitive factors such as Einstellung (set) and selective attention. The third mode was anticipated with remarkable foresight by Max Wertheimer in 1912, when he attributed apparent moti ...
... about the world (Metzger 1953). The second mode reflects a modifying influence of the visual input by higher-order cognitive factors such as Einstellung (set) and selective attention. The third mode was anticipated with remarkable foresight by Max Wertheimer in 1912, when he attributed apparent moti ...
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... Syndrome (CBS). It is important to note here that sometimes non-existent objects are reportedly visualized by subjects which are primarily due to residual information present in the visual cortex from past experiences [12]. Research into such observations has shown activations in V1 region of the br ...
... Syndrome (CBS). It is important to note here that sometimes non-existent objects are reportedly visualized by subjects which are primarily due to residual information present in the visual cortex from past experiences [12]. Research into such observations has shown activations in V1 region of the br ...
Processing of complex stimuli and natural scenes in the visual cortex
... estimating the speed of movement of a striped object that we see through an aperture. We cannot know its exact speed of movement. We might, however, know that objects typically move slowly across our visual field. And indeed, Weiss et al. [42] have demonstrated using psychophysical work that human ...
... estimating the speed of movement of a striped object that we see through an aperture. We cannot know its exact speed of movement. We might, however, know that objects typically move slowly across our visual field. And indeed, Weiss et al. [42] have demonstrated using psychophysical work that human ...
Investigating neural correlates of conscious perception by frequency
... FIG. 1. (Upper Left) High-resolution power-frequency spectra for steady-state evoked potentials recorded over an anterior channel (128) and over a posterior channel (103) during rivalry trials (subject O.S.). Note the sharp peak at 7.41 Hz (f1), the flicker frequency of s1, as well as at 8.33 Hz (f2 ...
... FIG. 1. (Upper Left) High-resolution power-frequency spectra for steady-state evoked potentials recorded over an anterior channel (128) and over a posterior channel (103) during rivalry trials (subject O.S.). Note the sharp peak at 7.41 Hz (f1), the flicker frequency of s1, as well as at 8.33 Hz (f2 ...
Information Optimization in Coupled Audio–Visual Cortical Maps Mehran Kardar A. Zee
... Ref. [7]. The essence of this approach is the assumption that neural connections act as linear filters of the incoming signals, and also introduce noise in the outputs. If the (correlated) input signals, and the random noise, are taken from Gaussian probability distributions, the outputs are also Ga ...
... Ref. [7]. The essence of this approach is the assumption that neural connections act as linear filters of the incoming signals, and also introduce noise in the outputs. If the (correlated) input signals, and the random noise, are taken from Gaussian probability distributions, the outputs are also Ga ...
The Neural Fate of Consciously Perceived and Missed Events in the
... when no scenes were presented (CR) [Miss ⬎ CR, t(18) ⫽ 2.19, p ⬍ 0.05], suggesting that the PPA responds to scenes even when they are not consciously perceived. Moreover, this subliminal PPA activation was enhanced when subjects consciously perceived the scenes [Figure 3; Hit ⬎ Miss, t(18) ⫽ 2.31, p ...
... when no scenes were presented (CR) [Miss ⬎ CR, t(18) ⫽ 2.19, p ⬍ 0.05], suggesting that the PPA responds to scenes even when they are not consciously perceived. Moreover, this subliminal PPA activation was enhanced when subjects consciously perceived the scenes [Figure 3; Hit ⬎ Miss, t(18) ⫽ 2.31, p ...
Towards natural stimulation in fMRI—Issues of data analysis
... cortex or the face-sensitive fusiform area, to monitor activations in these areas of interest. Such an approach was taken by Hasson et al. (2004) to demonstrate temporal similarities across subjects (“intersubject synchronization”) in several brain regions during natural viewing; additional spatiote ...
... cortex or the face-sensitive fusiform area, to monitor activations in these areas of interest. Such an approach was taken by Hasson et al. (2004) to demonstrate temporal similarities across subjects (“intersubject synchronization”) in several brain regions during natural viewing; additional spatiote ...
Visual behaviour mediated by retinal projections directed to the
... adding them last to this minimal adequate model. When there was signi®cant overdispersion using Poisson errors, we re-scaled the model using Pearson's x2/d.f. (where d.f. is degrees of freedom)22. Means 6 standard errors are reported. We assumed that foraging effort was proportional to percentage ti ...
... adding them last to this minimal adequate model. When there was signi®cant overdispersion using Poisson errors, we re-scaled the model using Pearson's x2/d.f. (where d.f. is degrees of freedom)22. Means 6 standard errors are reported. We assumed that foraging effort was proportional to percentage ti ...
Modeling Visual Cognition
... validity in relation to both their structure and parameters. The latter determines whether the models are valid in terms of their direct link to psychologically meaningful concepts such as the rate of encoding of stimulus information and the amount of information that can be retained in memory. An a ...
... validity in relation to both their structure and parameters. The latter determines whether the models are valid in terms of their direct link to psychologically meaningful concepts such as the rate of encoding of stimulus information and the amount of information that can be retained in memory. An a ...
On the importance of the transient visual response in the superior
... required to stimulate immediate action, either towards stimuli of interest (e.g. prey) or away from perilous stimuli (e.g. large looming things). The SC mediates these two fast responses through access to different motor output channels [4,5]. Unlike other parts of the visual orienting network (see ...
... required to stimulate immediate action, either towards stimuli of interest (e.g. prey) or away from perilous stimuli (e.g. large looming things). The SC mediates these two fast responses through access to different motor output channels [4,5]. Unlike other parts of the visual orienting network (see ...
The neural mechanisms of top- down attentional control
... analysis13,14 allowed us to combine the spatial resolution necessary for localization of neural activity, which this technique provides, with neuroimaging methods that selectively extract components of hemodynamic activity15 correlated with distinct aspects of complex-task performance. Here we used ...
... analysis13,14 allowed us to combine the spatial resolution necessary for localization of neural activity, which this technique provides, with neuroimaging methods that selectively extract components of hemodynamic activity15 correlated with distinct aspects of complex-task performance. Here we used ...
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 ...
Posterior Parietal Cortex: Space…and Beyond
... PFC neurons in monkeys can encode detailed information about the rule that is currently relevant for solving a complex behavioral task (White and Wise, 1999; Asaad et al., 2000; Wallis et al., 2001; Wallis and Miller, 2003). Hence, the PFC seems to play an important role in rule representation and r ...
... PFC neurons in monkeys can encode detailed information about the rule that is currently relevant for solving a complex behavioral task (White and Wise, 1999; Asaad et al., 2000; Wallis et al., 2001; Wallis and Miller, 2003). Hence, the PFC seems to play an important role in rule representation and r ...
A Maximum-Likelihood Approach to Modeling Multisensory
... [4], [5], [6]; see [7] for a review). Inverse effectiveness makes intuitive sense in the behavioral situation: the detection probability for a weak or ambiguous stimulus gains more from response enhancement by multisensory integration than a highintensity stimulus that is easily detected by a single ...
... [4], [5], [6]; see [7] for a review). Inverse effectiveness makes intuitive sense in the behavioral situation: the detection probability for a weak or ambiguous stimulus gains more from response enhancement by multisensory integration than a highintensity stimulus that is easily detected by a single ...
Rose F. Kennedy Intellectual and Developmental Disabilities
... afferents that are co-activated mutually reinforce each other. Recently, however, we have found that if this functional organization has not taken place, because the essential experiences to instantiate it have been precluded, the mature brain retains the capacity to incorporate it. These observatio ...
... afferents that are co-activated mutually reinforce each other. Recently, however, we have found that if this functional organization has not taken place, because the essential experiences to instantiate it have been precluded, the mature brain retains the capacity to incorporate it. These observatio ...
Selective visual attention and perceptual coherence
... abstract properties such as identity and behavioral relevance – must be bound together into a unified representation [1]. This requires coordinating the activity of neurons in early regions that code for specific visual features and locations with the activity of neurons at later stages that code fo ...
... abstract properties such as identity and behavioral relevance – must be bound together into a unified representation [1]. This requires coordinating the activity of neurons in early regions that code for specific visual features and locations with the activity of neurons at later stages that code fo ...
Brain Areas and Topography
... Definition of an “Area” • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which ...
... Definition of an “Area” • Neuroimager’s definition of an area: Some blob vaguely in the vicinity (+/- ~3 cm) of where I think it ought to be that lights up for something I think it ought to light up for • Neuroanatomist’s definition of an area: A circumscribed region of the cerebral cortex in which ...
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.