Visual areas and spatial summation in human visual cortex
... areas. Both areas include both an upper and lower visual field representation. Fig. 3b shows an expanded view of flat maps from three subjects. These flat maps are centered near the central representation of V3A/B. In all three maps, the responses in V3A/B and V7 span upper and lower visual field qu ...
... areas. Both areas include both an upper and lower visual field representation. Fig. 3b shows an expanded view of flat maps from three subjects. These flat maps are centered near the central representation of V3A/B. In all three maps, the responses in V3A/B and V7 span upper and lower visual field qu ...
The role of attention in binding visual features in working memory
... Vandenbroucke, 2009). In contrast, other studies have supported the conclusion that feature conjunctions can be maintained without need for continued attention. Gajewski and Brockmole (2006) showed that, in the face of attentional distraction, observers remember either all of an object’s features or ...
... Vandenbroucke, 2009). In contrast, other studies have supported the conclusion that feature conjunctions can be maintained without need for continued attention. Gajewski and Brockmole (2006) showed that, in the face of attentional distraction, observers remember either all of an object’s features or ...
Neuronal Correlates for Preparatory Set Associated with Pro
... Schmolesky et al., 1998). For comparing stimulus-related responses, we determined the mean activity in the interval 65 msec around the peak of neuronal activation in a time window from 70 to 140 msec after stimulus appearance, and the prestimulus activation in the interval 40 –50 msec after stimulus ...
... Schmolesky et al., 1998). For comparing stimulus-related responses, we determined the mean activity in the interval 65 msec around the peak of neuronal activation in a time window from 70 to 140 msec after stimulus appearance, and the prestimulus activation in the interval 40 –50 msec after stimulus ...
Activation of phonological codes during reading: Evidence
... significantly shorter than for spelling controls. In contrast, gaze duration were significantly longer on homophone errors than on correct target words. However, gaze duration on homophone errors were shorter than for spelling controls. When homophones were not predictable from the context, homophon ...
... significantly shorter than for spelling controls. In contrast, gaze duration were significantly longer on homophone errors than on correct target words. However, gaze duration on homophone errors were shorter than for spelling controls. When homophones were not predictable from the context, homophon ...
A COMMON REFERENCE FRAME FOR MOVEMENT PLANS IN
... location of visual targets in an eye-centred reference frame46–48. In this reference frame, neurons signal the relative distance between the monkey’s eye position and the position of a visual target (FIG. 2a). For example, an LIP neuron might respond maximally to a visual target that is located at t ...
... location of visual targets in an eye-centred reference frame46–48. In this reference frame, neurons signal the relative distance between the monkey’s eye position and the position of a visual target (FIG. 2a). For example, an LIP neuron might respond maximally to a visual target that is located at t ...
Neural correlates of attention in primate visual cortex
... imaging studies had traced these attentional effects on motion processing all the way back to V1 (Refs 34,35). Taken together, these studies demonstrate that attention influences processing in both pathways from the beginning, but they also indicate that the magnitude of attentional modulation incre ...
... imaging studies had traced these attentional effects on motion processing all the way back to V1 (Refs 34,35). Taken together, these studies demonstrate that attention influences processing in both pathways from the beginning, but they also indicate that the magnitude of attentional modulation incre ...
Enhanced Modulation of Neuronal Activity during
... behavioral goals or imposed task rules. For example, when we drive a car, we usually stop at a yellow light, but sometimes speed up on the same yellow light. The ability to alter the stimulus--response association depending on a given environment is essential for the volitional control of movements. ...
... behavioral goals or imposed task rules. For example, when we drive a car, we usually stop at a yellow light, but sometimes speed up on the same yellow light. The ability to alter the stimulus--response association depending on a given environment is essential for the volitional control of movements. ...
Vigabatrin: The Problem of Monitoring for Peripheral Vision Loss in
... appearance even when alterations to visual field occur from Vigabatrin toxicity, retinal examinations may offer the best method for detection of Vigabatrin toxicity in nonverbal patients. Changes to the optic nerve may occur, as may thinning of the nasal retinal nerve fiber layer, termed “inverse op ...
... appearance even when alterations to visual field occur from Vigabatrin toxicity, retinal examinations may offer the best method for detection of Vigabatrin toxicity in nonverbal patients. Changes to the optic nerve may occur, as may thinning of the nasal retinal nerve fiber layer, termed “inverse op ...
Stop Using Introspection to Gather Data for the Design of... Modeling and Spatial Assistance
... On the one hand, nowadays almost everyone believes that the visual system is a distinct input-module of the mind. But it has been frequently argued that visual mental imagery, a purely mental process, involves the resources of the visual module for the purposes of thinking and reasoning. Regardless ...
... On the one hand, nowadays almost everyone believes that the visual system is a distinct input-module of the mind. But it has been frequently argued that visual mental imagery, a purely mental process, involves the resources of the visual module for the purposes of thinking and reasoning. Regardless ...
Seeing faces and objects with the “mind`s eye”
... that could be retrieved by way of visual imagery. Moreover, with the same visual cue, a famous name, an image could be generated from either LTM or STM. For example, one could imagine Marilyn Monroe without seeing her picture before the imagery task (LTM), or one could memorize a specific picture of ...
... that could be retrieved by way of visual imagery. Moreover, with the same visual cue, a famous name, an image could be generated from either LTM or STM. For example, one could imagine Marilyn Monroe without seeing her picture before the imagery task (LTM), or one could memorize a specific picture of ...
Visuomotor Functions in the Frontal Lobe
... performing a task that required them to interrupt saccade preparation on a random subset of trials in response to a new stimulus. A mathematical race model that accounts for performance of this saccade-countermanding task provides unique theoretical leverage for distinguishing between neurons that c ...
... performing a task that required them to interrupt saccade preparation on a random subset of trials in response to a new stimulus. A mathematical race model that accounts for performance of this saccade-countermanding task provides unique theoretical leverage for distinguishing between neurons that c ...
Acoustical Vision of Neglected Stimuli: Interaction among Spatially
... presented at the same position (or at close disparity) as a visual stimulus influenced detection of previously neglected visual targets. Before going on to understand the implications of this finding in a context of a cross-modal interaction between vision and audition, we need to explore the possib ...
... presented at the same position (or at close disparity) as a visual stimulus influenced detection of previously neglected visual targets. Before going on to understand the implications of this finding in a context of a cross-modal interaction between vision and audition, we need to explore the possib ...
interactions between number and space in parietal cortex
... representation that is shared by the programming of a hand, eye or attention movement). However, so far, no study has sufficiently shown whether these reference frames are eye- or world-centred. Another related question concerns the stage of processing at which spatial–numerical interactions arise; ...
... representation that is shared by the programming of a hand, eye or attention movement). However, so far, no study has sufficiently shown whether these reference frames are eye- or world-centred. Another related question concerns the stage of processing at which spatial–numerical interactions arise; ...
Word - Jim Davies
... into n smaller different shapes, as one might cut a round pizza into roughly triangular shapes. To do this would require changing the transformation so that it either had a complex notion of how shapes can be sectioned, or took as an argument the resultant shapes. ...
... into n smaller different shapes, as one might cut a round pizza into roughly triangular shapes. To do this would require changing the transformation so that it either had a complex notion of how shapes can be sectioned, or took as an argument the resultant shapes. ...
Signals Conveyed in the Pulvinar Pathway from Superior Colliculus
... visual motion responses in MT (Thiele et al., 2002; Ibbotson et al., 2007; Bremmer et al., 2009) via the pathway through PI. The other modulation observed in SC is an enhanced visual response to a stimulus when that stimulus is the target for the next saccade (Goldberg and Wurtz, 1972b). This enhanc ...
... visual motion responses in MT (Thiele et al., 2002; Ibbotson et al., 2007; Bremmer et al., 2009) via the pathway through PI. The other modulation observed in SC is an enhanced visual response to a stimulus when that stimulus is the target for the next saccade (Goldberg and Wurtz, 1972b). This enhanc ...
KISHORE Aswathy - School of Computing
... a simple coloured object, the brain stores information about it using what is called a ‘compositional representation’. Accordingly, different features of the object such as shape, texture and colour will be represented in different parts of the brain. Hence, in order to have a complete representatio ...
... a simple coloured object, the brain stores information about it using what is called a ‘compositional representation’. Accordingly, different features of the object such as shape, texture and colour will be represented in different parts of the brain. Hence, in order to have a complete representatio ...
Perceptual Expectation Evokes Category
... Higher level visual priming of complex stimuli such as faces and houses has recently been shown to facilitate object recognition as well. For example, Puri and Wojciulik (2008) had participants discriminate between normal and distorted images of faces and houses. When they were told in advance to ex ...
... Higher level visual priming of complex stimuli such as faces and houses has recently been shown to facilitate object recognition as well. For example, Puri and Wojciulik (2008) had participants discriminate between normal and distorted images of faces and houses. When they were told in advance to ex ...
Visual Fields
... eye care offices. There are many different brands of perimeters. Most have many similar features. During automated perimetry testing, the patient’s non-tested eye is covered while the uncovered eye views a small fixation target located centrally in the visual field instrument. While the patient con ...
... eye care offices. There are many different brands of perimeters. Most have many similar features. During automated perimetry testing, the patient’s non-tested eye is covered while the uncovered eye views a small fixation target located centrally in the visual field instrument. While the patient con ...
The functional organization of the intraparietal sulcus in humans and
... changes in their 3D structure (Bodegard et al. 2001). Jäncke et al. (2001) also found activations in anterior (and posterior) IPS when subjects constructed or recognized 3D shapes with their hands. The same region has also been implicated in the discrimination of the orientation of visual stimuli (S ...
... changes in their 3D structure (Bodegard et al. 2001). Jäncke et al. (2001) also found activations in anterior (and posterior) IPS when subjects constructed or recognized 3D shapes with their hands. The same region has also been implicated in the discrimination of the orientation of visual stimuli (S ...
Optometric Management Of A Patient With Parietal Lobe Injury
... to temporal frequency gives it its poorer sensitivity to high temporal frequency stimuli; in other words it is a poor detector of changes in motion.20 Additionally, parvocellular receptive fields are smaller in size, making them more sensitive to high spatial frequencies. This increased sensitivity ...
... to temporal frequency gives it its poorer sensitivity to high temporal frequency stimuli; in other words it is a poor detector of changes in motion.20 Additionally, parvocellular receptive fields are smaller in size, making them more sensitive to high spatial frequencies. This increased sensitivity ...
The Receptive Fields of Inferior Temporal Cortex Neurons in Natural
... sufficient, but especially when two stimuli were on the screen, one or two more saccades were sometimes needed, because sometimes the first saccade was to the nontarget object. The firing rates of a cell as a function of the distance from the effective stimulus were measured during each period in wh ...
... sufficient, but especially when two stimuli were on the screen, one or two more saccades were sometimes needed, because sometimes the first saccade was to the nontarget object. The firing rates of a cell as a function of the distance from the effective stimulus were measured during each period in wh ...
Representation of naturalistic image structure in the primate visual
... responses are described as an average over these simple cell responses, all having the same orientation preference, but differing in the spatial location of their filters (Hubel & Wiesel, 1962; Movshon et al., 1978; Adelson and Bergen, 1985). Measuring statistics in a physiologically consistent form ...
... responses are described as an average over these simple cell responses, all having the same orientation preference, but differing in the spatial location of their filters (Hubel & Wiesel, 1962; Movshon et al., 1978; Adelson and Bergen, 1985). Measuring statistics in a physiologically consistent form ...
ppt - UC Davis Imaging Research Center
... across studies No studies have been run assessing whether behavioral effects vary according to the type of switch required Only recently have attempts been made to dissociate neural activity in regard to different types of shifts (Wager, et al., 2005). We focus on two types of shifts: Percep ...
... across studies No studies have been run assessing whether behavioral effects vary according to the type of switch required Only recently have attempts been made to dissociate neural activity in regard to different types of shifts (Wager, et al., 2005). We focus on two types of shifts: Percep ...
PPRF lesions at the level of abducens
... There are four theoretical possibilities to account for the ipsilateral horizontal gaze palsy due to a single unilateral lesion affecting 1. The ipsilateral paramedial pontine reticular formation (PPRF) only 2. The ipsilateral abducens nucleus (AN) alone 3. Both the ipsilateral PPRF and the AN, or w ...
... There are four theoretical possibilities to account for the ipsilateral horizontal gaze palsy due to a single unilateral lesion affecting 1. The ipsilateral paramedial pontine reticular formation (PPRF) only 2. The ipsilateral abducens nucleus (AN) alone 3. Both the ipsilateral PPRF and the AN, or w ...
Horizontal Gaze Palsy
... The patient was unable to move her eyes to the right past the midline using either saccadic or pursuit eye movements Head rotation to the left, however, drove the eyes past the midline, but the right eye abducted incompletely Vergence movements induced the left eye to cross the midline Vertical eye ...
... The patient was unable to move her eyes to the right past the midline using either saccadic or pursuit eye movements Head rotation to the left, however, drove the eyes past the midline, but the right eye abducted incompletely Vergence movements induced the left eye to cross the midline Vertical eye ...