The Experts below are selected from a list of 30198 Experts worldwide ranked by ideXlab platform
Emily M Crowe - One of the best experts on this subject based on the ideXlab platform.
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Visual Spatial Attention and Spatial working memory do not draw on shared capacity limited core processes
Quarterly Journal of Experimental Psychology, 2020Co-Authors: Christina J Howard, Rebekah Pole, Paulina Montgomery, Amanda Woodward, D Guest, Bradley Standen, Christopher Kent, Emily M CroweAbstract:The extent to which similar capacity limits in Visual Attention and Visual working memory indicate a common shared underlying mechanism is currently still debated. In the Spatial domain, the multip...
Lorella Battelli - One of the best experts on this subject based on the ideXlab platform.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
NeuroImage, 2009Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence on the visuoSpatial allocation of Attention, with presentation of numbers from the low and high ends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental number line. We used a priming paradigm with a line bisection task to assess the bias in Spatial allocation of Visual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied over the right angular gyrus during the delay between the prime and the target line abolished the effect of number priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
Brain Stimulation, 2008Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:article i nfo We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence onthevisuoSpatialallocation of Attention, with presentation of numbers fromthelowand highends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental numberline.WeusedaprimingparadigmwithalinebisectiontasktoassessthebiasinSpatialallocationofVisual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied overtherightangulargyrusduringthedelaybetweentheprimeandthetargetlineabolishedtheeffectofnumber priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
Alvaro Pascualleone - One of the best experts on this subject based on the ideXlab platform.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
NeuroImage, 2009Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence on the visuoSpatial allocation of Attention, with presentation of numbers from the low and high ends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental number line. We used a priming paradigm with a line bisection task to assess the bias in Spatial allocation of Visual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied over the right angular gyrus during the delay between the prime and the target line abolished the effect of number priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
Brain Stimulation, 2008Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:article i nfo We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence onthevisuoSpatialallocation of Attention, with presentation of numbers fromthelowand highends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental numberline.WeusedaprimingparadigmwithalinebisectiontasktoassessthebiasinSpatialallocationofVisual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied overtherightangulargyrusduringthedelaybetweentheprimeandthetargetlineabolishedtheeffectofnumber priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
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enhanced Visual Spatial Attention ipsilateral to rtms induced virtual lesions of human parietal cortex
Nature Neuroscience, 2001Co-Authors: Hugo Theoret, Claus C Hilgetag, Alvaro PascualleoneAbstract:The breakdown of Attentional mechanisms after brain damage can have drastic behavioral consequences, as in patients suffering from Spatial neglect. While much research has concentrated on impaired Attention to targets contralateral to sites of brain damage, here we report the ipsilateral enhancement of Visual Attention after repetitive transcranial magnetic stimulation (rTMS) of parietal cortex at parameters known to reduce cortical excitability. Normal healthy subjects received rTMS (1 Hz, 10 mins) over right or left parietal cortex. Subsequently, detection of Visual stimuli contralateral to the stimulated hemisphere was consistently impaired when stimuli were also present in the opposite hemifield, mirroring the extinction phenomenon commonly observed in neglect patients. Additionally, subjects’ Attention to ipsilateral targets improved significantly over normal levels. These results underline the potential of focal brain dysfunction to produce behavioral improvement and give experimental support to models of interhemispheric competition in the distributed brain network for Spatial Attention.
Juha Silvanto - One of the best experts on this subject based on the ideXlab platform.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
NeuroImage, 2009Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence on the visuoSpatial allocation of Attention, with presentation of numbers from the low and high ends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental number line. We used a priming paradigm with a line bisection task to assess the bias in Spatial allocation of Visual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied over the right angular gyrus during the delay between the prime and the target line abolished the effect of number priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
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the role of the angular gyrus in the modulation of visuoSpatial Attention by the mental number line
Brain Stimulation, 2008Co-Authors: Zaira Cattaneo, Juha Silvanto, Alvaro Pascualleone, Lorella BattelliAbstract:article i nfo We tend to mentally organize numbers along a left-to-right oriented horizontal mental number line, with the smaller numbers occupying the more leftward positions. This mental number line has been shown to exert an influence onthevisuoSpatialallocation of Attention, with presentation of numbers fromthelowand highends of the mental number line inducing covert shifts of Spatial Attention to the left and right side of Visual space, respectively. However, the neural basis of this modulation is not known. Here we used transcranial magnetic stimulation (TMS) to study the role of the angular gyrus in shifts in visuoSpatial Attention induced by the mental numberline.WeusedaprimingparadigmwithalinebisectiontasktoassessthebiasinSpatialallocationofVisual Attention induced by exposure to either small (16-24) or large (76-84) ends of the mental number line. In the Small Number Prime condition, when Attention is presumably biased to the left side of Visual space, TMS applied overtherightangulargyrusduringthedelaybetweentheprimeandthetargetlineabolishedtheeffectofnumber priming. In contrast, application of TMS over the left angular gyrus had no significant effect. In the Large Number Prime condition (which shifted Attention to the right side of Visual space) both left and right TMS over the angular gyrus modulated the effect of number priming. This pattern of results reveals the involvement of the angular gyrus in the interaction between the mental number line and Visual Spatial Attention.
Tirin Moore - One of the best experts on this subject based on the ideXlab platform.
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differences in noradrenaline receptor expression across different neuronal subtypes in macaque frontal eye field
Frontiers in Neuroanatomy, 2020Co-Authors: Max Lee, Adrienne Mueller, Tirin MooreAbstract:Cognitive functions such as Attention and working memory are modulated by noradrenaline receptors in the prefrontal cortex (PFC). The frontal eye field (FEF) has been shown to play an important role in Visual Spatial Attention. However, little is known about the underlying circuitry. The aim of this study was to characterize the expression of noradrenaline receptors on different pyramidal neuron and inhibitory interneuron subtypes in macaque FEF. Using immunofluorescence, we found broad expression of noradrenaline receptors across all layers of the FEF. Differences in the expression of different noradrenaline receptors were observed across different inhibitory interneuron subtypes. No significant differences were observed in the expression of noradrenaline receptors across different pyramidal neuron subtypes. However, we found that putative long-range projecting pyramidal neurons expressed all noradrenaline receptor subtypes at a much higher proportion than any of the other neuronal subtypes. Nearly all long-range projecting pyramidal neurons expressed all types of noradrenaline receptor, suggesting that there is no receptor-specific machinery acting on these long-range projecting pyramidal neurons. This pattern of expression among long-range projecting pyramidal neurons suggests a mechanism by which noradrenergic modulation of FEF activity influences Attention and working memory.
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differential expression of dopamine d5 receptors across neuronal subtypes in macaque frontal eye field
Frontiers in Neural Circuits, 2018Co-Authors: Adrienne Mueller, Tirin Moore, Steven ShepardAbstract:Dopamine signaling in the prefrontal cortex (PFC) is important for cognitive functions, yet very little is known about the expression of the D5 class of dopamine receptors (D5Rs) in this region. To address this, we co-stained for D5Rs, pyramidal neurons (neurogranin+), putative long-range projection pyramidal neurons (SMI-32+), and several classes of inhibitory interneuron (parvalbumin+, calbindin+, calretinin+, somatostatin+) within the frontal eye field (FEF): an area within the PFC involved in the control of Visual Spatial Attention. We then quantified the co-expression of D5Rs with markers of different cell types across different layers of the FEF. We show that: (1) D5Rs are more prevalent on pyramidal neurons than on inhibitory interneurons. (2) D5Rs are disproportionately expressed on putative long-range projecting pyramidal neurons. The disproportionately high expression of D5Rs on long-range projecting pyramidals, compared to interneurons, was particularly pronounced in layers II-III. Together these results indicate that the engagement of D5R-dependent mechanisms in the FEF varies depending on cell type and cortical layer, and suggests that non-locally projecting neurons contribute disproportionately to functions involving the D5R subtype.
