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 ...
The Integrative Role of Posterior Parietal Cortex and related Clinical S
... cognition or on the use of that as an aid to some other superior function (language, spatial orientation, attention orientation, etc.). The accurate correlation between each one of those syndromes and the subjacent anatomic injury is usually not possible, due to significant anatomic variability of n ...
... cognition or on the use of that as an aid to some other superior function (language, spatial orientation, attention orientation, etc.). The accurate correlation between each one of those syndromes and the subjacent anatomic injury is usually not possible, due to significant anatomic variability of n ...
Diapositive 1 - Andrei Gorea, Ph
... the same region of the left eye's image). The algorithm requires matches to be made between dots of the same colour, which gives rise to possible correspondences at all the nodes in the network marked by an open circle. Neighbouring matches with the same disparity support one another in the network, ...
... the same region of the left eye's image). The algorithm requires matches to be made between dots of the same colour, which gives rise to possible correspondences at all the nodes in the network marked by an open circle. Neighbouring matches with the same disparity support one another in the network, ...
Modeling Visual Cognition
... features from simultaneously presented visual stimuli. In one of these experiments, two colored bars were presented and the task of the participant was to report both the color and the orientation of the two stimuli. We found strong evidence for parallel independent processing in this and several ot ...
... features from simultaneously presented visual stimuli. In one of these experiments, two colored bars were presented and the task of the participant was to report both the color and the orientation of the two stimuli. We found strong evidence for parallel independent processing in this and several ot ...
T2 - Center for Neural Basis of Cognition
... classical receptive field. Vision is an active process of building representations. ...
... classical receptive field. Vision is an active process of building representations. ...
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 ...
lecture9
... moved his eyes and head the world did not move around so much. He began to feel as though his left hand was on the right, and his right hand on the left. If this new location of his body was vivid, the world appeared right side up, but sometimes he felt his body was upside down in a visually right-s ...
... moved his eyes and head the world did not move around so much. He began to feel as though his left hand was on the right, and his right hand on the left. If this new location of his body was vivid, the world appeared right side up, but sometimes he felt his body was upside down in a visually right-s ...
Investigating neural correlates of conscious perception by frequency
... establish a steady-state response. Neuromagnetic data were then recorded for 315 sec, resulting in a frequency resolution of 0.0032 Hz. Data were bandpass filtered at 1–50 Hz and digitized at 254 Hz. For each channel, the power spectrum of the entire recording interval was calculated by using a fast ...
... establish a steady-state response. Neuromagnetic data were then recorded for 315 sec, resulting in a frequency resolution of 0.0032 Hz. Data were bandpass filtered at 1–50 Hz and digitized at 254 Hz. For each channel, the power spectrum of the entire recording interval was calculated by using a fast ...
Gaze direction controls response gain in primary visual
... position signals. Cortical neural processes for encoding information about the three-dimensional position of a stimulus in space therefore start as early as area V1. Area V1 is the ®rst cortical area where orientation and horizontal retinal disparity are encoded13±15. Here, cells have oriented recep ...
... position signals. Cortical neural processes for encoding information about the three-dimensional position of a stimulus in space therefore start as early as area V1. Area V1 is the ®rst cortical area where orientation and horizontal retinal disparity are encoded13±15. Here, cells have oriented recep ...
Preattentive Filling-in of Visual Surfaces in Parietal Extinction
... normal humans (10). If so, and if parietal extinction is indeed a deficit of attentive vision only, then this visual completion should still arise in parietal extinction patients. The present study tests this neuropsychological prediction. In contrast to previous studies of “implicit” processing of ...
... normal humans (10). If so, and if parietal extinction is indeed a deficit of attentive vision only, then this visual completion should still arise in parietal extinction patients. The present study tests this neuropsychological prediction. In contrast to previous studies of “implicit” processing of ...
Modulation of early cortical processing during divided attention to
... section in Materials and methods). The current study therefore examined the topographic distribution of suppressive alpha oscillations to examine whether they fit with the predictions of either model. Another question about the ability to split the attentional spotlight relates to the timing of the a ...
... section in Materials and methods). The current study therefore examined the topographic distribution of suppressive alpha oscillations to examine whether they fit with the predictions of either model. Another question about the ability to split the attentional spotlight relates to the timing of the a ...
Visual Perception
... The distribution of light and shadow on a objects is also a powerful monocular cue for depth provided by the biologically correct assumption that light comes from above. ...
... The distribution of light and shadow on a objects is also a powerful monocular cue for depth provided by the biologically correct assumption that light comes from above. ...
CATEGORIES IN THE PIGEON BRAIN - Ruhr-Universität
... The subjects were three adult homing pigeons (Columba livia) obtained from local breeders that had previously participated in unrelated experiments. They were housed in individual wire-mesh cages with a 12 to 12 lightdark cycle beginning at 08.00 hr. They were food-deprived and maintained at 80-90% ...
... The subjects were three adult homing pigeons (Columba livia) obtained from local breeders that had previously participated in unrelated experiments. They were housed in individual wire-mesh cages with a 12 to 12 lightdark cycle beginning at 08.00 hr. They were food-deprived and maintained at 80-90% ...
Activity 3 - Classical Conditioning
... intention of conditioning a fear response. This protocol is within the bounds of day-to-day experience as the stimulus used is commonly available through readily accessible sound clips and will not risk causing any greater distress to participants than they would expect to encounter normally. Furthe ...
... intention of conditioning a fear response. This protocol is within the bounds of day-to-day experience as the stimulus used is commonly available through readily accessible sound clips and will not risk causing any greater distress to participants than they would expect to encounter normally. Furthe ...
Binding Mechanisms in Visual Perception
... Supèr et al (2001) observed that area V1 has two different processing modes corresponding to figure and ground information processing, and there exits significant contexture modulation between these two modes if figure is more salient in its background. One of the other experiments was studied by L ...
... Supèr et al (2001) observed that area V1 has two different processing modes corresponding to figure and ground information processing, and there exits significant contexture modulation between these two modes if figure is more salient in its background. One of the other experiments was studied by L ...
Perception
... Physiologal approach to perception: measuring the relationship between stimuli and physiological processes ...
... Physiologal approach to perception: measuring the relationship between stimuli and physiological processes ...
VISION John Gabrieli Melissa Troyer 9.00
... • ambient brightness varies greatly outdoor sun, cloud indoor, bright, less bright shadows - piece of coal in sunlight may reflect 10x as much light as snow in the shade • but we recognize things by their brightness • so we use unconscious inference to perceive an object’s brightness ...
... • ambient brightness varies greatly outdoor sun, cloud indoor, bright, less bright shadows - piece of coal in sunlight may reflect 10x as much light as snow in the shade • but we recognize things by their brightness • so we use unconscious inference to perceive an object’s brightness ...
Visual field defect
... Papillitis >> inflammation of the anterior optic nerve causes disc swelling, and sometimes hemorrhages, cells in the vitreous, and deep retinal exudates. After the neuritis resolves, the disc is often pale (optic pallor), most commonly in the temporal aspect. Atrophy is seen over time, especially af ...
... Papillitis >> inflammation of the anterior optic nerve causes disc swelling, and sometimes hemorrhages, cells in the vitreous, and deep retinal exudates. After the neuritis resolves, the disc is often pale (optic pallor), most commonly in the temporal aspect. Atrophy is seen over time, especially af ...
The Visual Perception System
... The fibres of the optic nerve that originate from the left side of each retina transmits visual info to the left visual cortex. Visa versa with right side. The transmission of visual info along the optic nerve from each retina involves a partial cross over of neural pathways. Selection: a process wh ...
... The fibres of the optic nerve that originate from the left side of each retina transmits visual info to the left visual cortex. Visa versa with right side. The transmission of visual info along the optic nerve from each retina involves a partial cross over of neural pathways. Selection: a process wh ...
Lateral Geniculate nucleus
... The primary visual cortex (V1) has a representation of the contralateral visual hemifield. The foveal region is mapped in its most posterior part, whereas the more peripheral regions are mapped in progressively more anterior parts. The upper visual field is mapped below the calcarine fissure, the lo ...
... The primary visual cortex (V1) has a representation of the contralateral visual hemifield. The foveal region is mapped in its most posterior part, whereas the more peripheral regions are mapped in progressively more anterior parts. The upper visual field is mapped below the calcarine fissure, the lo ...
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 ...
Visual Dysfunction in Brain Injury
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
... Retrospective study of 160 TBI patients (AOA Journal 2007) ...
Synopsis: Overview Perception Retina Central projections LGN
... for olfactory decision making (Choi et al., 2011). However, there is also direct output from olfactory bulb MCs to entorhinal cortex ...
... for olfactory decision making (Choi et al., 2011). However, there is also direct output from olfactory bulb MCs to entorhinal cortex ...
Visual Field
... Visual Acuity is measuring the resolving power of the eye. The standard test is the Snellen chart, which consists of rows of letters of decreasing size. Each row is numbered with the distance in meters at which each letter subtends 5 minutes of arc at the nodal point of the eye. ...
... Visual Acuity is measuring the resolving power of the eye. The standard test is the Snellen chart, which consists of rows of letters of decreasing size. Each row is numbered with the distance in meters at which each letter subtends 5 minutes of arc at the nodal point of the eye. ...
Interactions between attention, context and learning in primary
... stronger when the cell is simultaneously activated by interlaminar connections, which would be activated by stimuli lying within the receptive field. In the presence of more complex visual environments, and under distributed attention (see below) the facilitation is seen not just with stimuli presen ...
... stronger when the cell is simultaneously activated by interlaminar connections, which would be activated by stimuli lying within the receptive field. In the presence of more complex visual environments, and under distributed attention (see below) the facilitation is seen not just with stimuli presen ...