Meaningful auditory information enhances perception of visual
... if auditory and visual signals integrate in the perception of a form of audiovisual “biological motion”: tap dancing. The first experiment showed that a non-informative audio sequence can facilitate the recognition of visual tap dance sequences, provided that the taps are in synchrony with the visua ...
... if auditory and visual signals integrate in the perception of a form of audiovisual “biological motion”: tap dancing. The first experiment showed that a non-informative audio sequence can facilitate the recognition of visual tap dance sequences, provided that the taps are in synchrony with the visua ...
The Neural Fate of Consciously Perceived and Missed Events in the
... studies could not determine the functional neuroanatomy of unconsciously processed events under conditions of inattention nor could they reveal how it differs from that of consciously perceived events. In support of a second, attention-demanding stage, manipulations that affect the magnitude of the ...
... studies could not determine the functional neuroanatomy of unconsciously processed events under conditions of inattention nor could they reveal how it differs from that of consciously perceived events. In support of a second, attention-demanding stage, manipulations that affect the magnitude of the ...
Visual Properties of Neurons in a Polysensory Area in Superior
... or contrast. These nonselective units would respond similarly to spots and slits of light, to shadows, to slides and photographs of complex objects, and to three-dimensional objects. Many of these units would even respond to a very small (< 1”) stimulus moving rapidly (>5O”/s) through a small portio ...
... or contrast. These nonselective units would respond similarly to spots and slits of light, to shadows, to slides and photographs of complex objects, and to three-dimensional objects. Many of these units would even respond to a very small (< 1”) stimulus moving rapidly (>5O”/s) through a small portio ...
Representation of naturalistic image structure in the primate visual
... Visual texture: models and human perception “Visual texture” refers to portions of an image that are filled with repeated elements, often subject to some randomization in their location, size, color, orientation, etc; for example, an image of leaves, or pebbles, or tree bark (Fig. 1a). Lettvin (1976 ...
... Visual texture: models and human perception “Visual texture” refers to portions of an image that are filled with repeated elements, often subject to some randomization in their location, size, color, orientation, etc; for example, an image of leaves, or pebbles, or tree bark (Fig. 1a). Lettvin (1976 ...
T2 - Center for Neural Basis of Cognition
... 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 representations. ...
... 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 representations. ...
Electrophysiology in Vision How VEP and ERG Can Impact Your
... of Toronto ), found in a primate model that there was extensive loss of nerve cells in the lateral geniculate nucleus with progressive glaucoma, a process known as transneuronal degeneration. According to Dr. Weinreb, by studying changes in the brainstem we may better understand what causes vision l ...
... of Toronto ), found in a primate model that there was extensive loss of nerve cells in the lateral geniculate nucleus with progressive glaucoma, a process known as transneuronal degeneration. According to Dr. Weinreb, by studying changes in the brainstem we may better understand what causes vision l ...
Computational modeling of responses in human visual
... neuroscience methods. Perhaps the most valuable aspect of stimulus-referred measurement is that it supports the coordination of insights from many parts of vision science - including optics, retinal processing, cortical circuitry, local field potentials, scalp recordings, and perception. Integration ...
... neuroscience methods. Perhaps the most valuable aspect of stimulus-referred measurement is that it supports the coordination of insights from many parts of vision science - including optics, retinal processing, cortical circuitry, local field potentials, scalp recordings, and perception. Integration ...
The Motor System of the Cortex and the Brain Stem
... direction, discharge was minimal. Therefore, the discharge during the delay period appeared to be related in some way to the target’s position. Importantly, after the go signal was given, the discharge remained the same as it was during the delay period. This second observation suggests that the in ...
... direction, discharge was minimal. Therefore, the discharge during the delay period appeared to be related in some way to the target’s position. Importantly, after the go signal was given, the discharge remained the same as it was during the delay period. This second observation suggests that the in ...
5. Discussion - UvA-DARE - University of Amsterdam
... V1 neurons. As described above, the primary visual cortex may improve this code for relevant stimuli by adjusting response amplitudes and selectivity of tuning curves of specific subsets of cells. As in any concert, however, the quality of a performance does not only hinge on the tuning of the indiv ...
... V1 neurons. As described above, the primary visual cortex may improve this code for relevant stimuli by adjusting response amplitudes and selectivity of tuning curves of specific subsets of cells. As in any concert, however, the quality of a performance does not only hinge on the tuning of the indiv ...
Document
... here, the same background is always used, and it is always in the same position, with stimuli moved to different positions on it. The nine stimulus locations are arranged in a square grid across the background, where the grid spacings are 32 pixels horizontally or vertically. Before images are prese ...
... here, the same background is always used, and it is always in the same position, with stimuli moved to different positions on it. The nine stimulus locations are arranged in a square grid across the background, where the grid spacings are 32 pixels horizontally or vertically. Before images are prese ...
Vigabatrin: The Problem of Monitoring for Peripheral Vision Loss in
... field testing the ophthalmologist caring for such children may have to rely on alternative methods to evaluate for Vigabitrin toxicity. 1. Serial fundus examinations: Although the fundus may remain entirely normal in appearance even when alterations to visual field occur from Vigabatrin toxicity, r ...
... field testing the ophthalmologist caring for such children may have to rely on alternative methods to evaluate for Vigabitrin toxicity. 1. Serial fundus examinations: Although the fundus may remain entirely normal in appearance even when alterations to visual field occur from Vigabatrin toxicity, r ...
2320Lecture20
... • Posner and colleagues – Use cue-target paradigm to investigate attentional abilities of parietal lesion patients – Prediction: stimuli in ipsilesional field always faster than stimuli in contralesional field and cues don’t matter ...
... • Posner and colleagues – Use cue-target paradigm to investigate attentional abilities of parietal lesion patients – Prediction: stimuli in ipsilesional field always faster than stimuli in contralesional field and cues don’t matter ...
The “Conscious” Dorsal Stream - Università degli Studi di Parma
... The notion that spatial awareness is linked to movement is pretty old. Von Helmoltz (1896) proposed the notion that the “a-priori” nature of our representation of space depends on the fact that it is generated by active exploratory behavior. Indeed, as it has been argued elsewhere (see Rizzolatti et ...
... The notion that spatial awareness is linked to movement is pretty old. Von Helmoltz (1896) proposed the notion that the “a-priori” nature of our representation of space depends on the fact that it is generated by active exploratory behavior. Indeed, as it has been argued elsewhere (see Rizzolatti et ...
The Physiology of the Senses Lecture 6 Visually Guided Actions
... foveal location and B to a less peripheral location. In V1 this is where B would have been coded were it visible. ...
... foveal location and B to a less peripheral location. In V1 this is where B would have been coded were it visible. ...
“Conscious” Dorsal Stream
... The notion that spatial awareness is linked to movement is pretty old. Von Helmoltz (1896) proposed the notion that the “a-priori” nature of our representation of space depends on the fact that it is generated by active exploratory behavior. Indeed, as it has been argued elsewhere (see Rizzolatti et ...
... The notion that spatial awareness is linked to movement is pretty old. Von Helmoltz (1896) proposed the notion that the “a-priori” nature of our representation of space depends on the fact that it is generated by active exploratory behavior. Indeed, as it has been argued elsewhere (see Rizzolatti et ...
Selective visual attention and perceptual coherence
... and is therefore used here as a model to discuss the representation of attentional priority in visual cortex. In the following sections, we review evidence that multiple subcortical and cortical visual areas represent attentional priority. We organize the discussion based on a feedforward conception ...
... and is therefore used here as a model to discuss the representation of attentional priority in visual cortex. In the following sections, we review evidence that multiple subcortical and cortical visual areas represent attentional priority. We organize the discussion based on a feedforward conception ...
Human brain spots emotion in non humanoid
... expression at a latency of 90 ms, and differentiating monkey identity about 70 ms later (Sugase et al., 1999). These delays meet P1 and N170 visual components latencies in human EEG studies, with the P1 wave being modulated by emotion, and the N170 wave being mainly modulated by facial configuration ...
... expression at a latency of 90 ms, and differentiating monkey identity about 70 ms later (Sugase et al., 1999). These delays meet P1 and N170 visual components latencies in human EEG studies, with the P1 wave being modulated by emotion, and the N170 wave being mainly modulated by facial configuration ...
Feedforward, horizontal, and feedback processing
... The effect of lesioning extrastriate cortex on the neural correlate of figure–ground segregation in V1. Responses in V1 to (a) a figure–ground display were sampled (b) using the RF (open circle) of a neuron on the background, the boundary, or the figure surface, while RF stimulation is left identica ...
... The effect of lesioning extrastriate cortex on the neural correlate of figure–ground segregation in V1. Responses in V1 to (a) a figure–ground display were sampled (b) using the RF (open circle) of a neuron on the background, the boundary, or the figure surface, while RF stimulation is left identica ...
Relative timing: from behaviour to neurons
... Figure 1. Hypothetical psychometric function from a temporal order judgement (TOJ) experiment. Two stimuli (A and B) are presented with a range of stimulus onset asynchronies (SOA). Subject’s probability of reporting stimulus A appearing first is plotted as a function of SOA, defined as ‘stimulus A ...
... Figure 1. Hypothetical psychometric function from a temporal order judgement (TOJ) experiment. Two stimuli (A and B) are presented with a range of stimulus onset asynchronies (SOA). Subject’s probability of reporting stimulus A appearing first is plotted as a function of SOA, defined as ‘stimulus A ...
GABA-antagonist inverts movement and object detection in flies
... spatial wavelength of grating 13"; contrast 30%; stimulus frequency 3 Hz). The flies were stimulated repetitively with a constant sequence of visual stimuli. This consisted of motion from back to front. counterphase flicker, motion from front to back and again counterphase flicker. Each stimulus las ...
... spatial wavelength of grating 13"; contrast 30%; stimulus frequency 3 Hz). The flies were stimulated repetitively with a constant sequence of visual stimuli. This consisted of motion from back to front. counterphase flicker, motion from front to back and again counterphase flicker. Each stimulus las ...
Williams Syndrome Neuronal Size and Neuronal-Packing Density in Primary Visual Cortex
... The primary visual cortex, area 17,31 was easily identified in WMS-affected and control brains on the calcarine region. Three fields from the pial surface to the gray-white matter junction were selected where the plane of section was perpendicular or near perpendicular to the pial surface and there ...
... The primary visual cortex, area 17,31 was easily identified in WMS-affected and control brains on the calcarine region. Three fields from the pial surface to the gray-white matter junction were selected where the plane of section was perpendicular or near perpendicular to the pial surface and there ...
A Maximum-Likelihood Approach to Modeling Multisensory
... where CM is the mean number of impulses evoked by the combined-modality stimulus in a given time interval, and SMmax refers to the response of the most effective single-modality stimulus (cf. [3]). Response enhancement in the DSC neurons can be quite impressive, with values of M RE sometimes reachin ...
... where CM is the mean number of impulses evoked by the combined-modality stimulus in a given time interval, and SMmax refers to the response of the most effective single-modality stimulus (cf. [3]). Response enhancement in the DSC neurons can be quite impressive, with values of M RE sometimes reachin ...
Neural coding of behavioral relevance in parietal cortex
... and behavioral modulation less directly. For example, it has been known for a long time that a difficult task could increase the responses of neurons, presumably by demanding more attention to relevant stimuli [28]. Other experiments suggest that attention can increase or decrease responses to task- ...
... and behavioral modulation less directly. For example, it has been known for a long time that a difficult task could increase the responses of neurons, presumably by demanding more attention to relevant stimuli [28]. Other experiments suggest that attention can increase or decrease responses to task- ...
Responses to Rare Visual Target and Distractor Stimuli Using Event
... specificity of fMRI when compared with ERPs. This in turn would assist in the interpretation of these ERP effects in clinical populations and may offer additional information useful for the diagnosis and treatment of CNS disorders. Previous ERP studies suggested that the oddball task involves multip ...
... specificity of fMRI when compared with ERPs. This in turn would assist in the interpretation of these ERP effects in clinical populations and may offer additional information useful for the diagnosis and treatment of CNS disorders. Previous ERP studies suggested that the oddball task involves multip ...
(2006) Changes in visual receptive fields with microstimulation of
... When pairs of stimuli (oriented bars) are presented simultaneously in the receptive field (RF) of a neuron in extrastriate cortex, visual responses to the pair fall between the responses to each stimulus presented in isolation. Directing attention to one of two RF stimuli (yellow spotlight) increase ...
... When pairs of stimuli (oriented bars) are presented simultaneously in the receptive field (RF) of a neuron in extrastriate cortex, visual responses to the pair fall between the responses to each stimulus presented in isolation. Directing attention to one of two RF stimuli (yellow spotlight) increase ...
Visual extinction
Visual extinction is a neurological disorder which occurs following damage to the parietal lobe of the brain. It is similar to, but distinct from, hemispatial neglect. Visual extinction has the characteristic symptom of difficulty to perceive contralesional stimuli when presented simultaneously with an ipsilesional stimulus, but the ability to correctly identify them when not presented simultaneously. Under simultaneous presentation, the contralesional stimulus is apparently ignored by the patient, or extinguished. This deficiency may lead to difficulty on behalf of the patient with processing the stimuli’s 3D position.