Spatiotemporal activation of the two visual pathways in form discrimination and spatial location: A brain mapping study

Rao, Hengyi; Zhou, Tiangang; Zhuo, Yan; Fan, Shilei; Chen, Lin

doi:10.1002/hbm.10076

Cited by 34 publications

(25 citation statements)

References 35 publications

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“…Previous studies investigating local and global processing mechanisms in the human brain noted an involvement of the precuneus (Heinze et al 1998;Wilkinson et al 2001;Rao et al 2003) while others failed to show such a role (Fink et al 1997). The mechanisms underlying the activation of the precuneus remain largely under debate.…”

Section: Discussionmentioning

confidence: 94%

The role of temporo-parietal junction (TPJ) in global Gestalt perception

Huberle

Karnath

2011

Brain Struct Funct

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Grouping processes enable the coherent perception of our environment. A number of brain areas has been suggested to be involved in the integration of elements into objects including early and higher visual areas along the ventral visual pathway as well as motion-processing areas of the dorsal visual pathway. However, integration not only is required for the cortical representation of individual objects, but is also essential for the perception of more complex visual scenes consisting of several different objects and/or shapes. The present fMRI experiments aimed to address such integration processes. We investigated the neural correlates underlying the global Gestalt perception of hierarchically organized stimuli that allowed parametrical degrading of the object at the global level. The comparison of intact versus disturbed perception of the global Gestalt revealed a network of cortical areas including the temporo-parietal junction (TPJ), anterior cingulate cortex and the precuneus. The TPJ location corresponds well with the areas known to be typically lesioned in stroke patients with simultanagnosia following bilateral brain damage. These patients typically show a deficit in identifying the global Gestalt of a visual scene. Further, we found the closest relation between behavioral performance and fMRI activation for the TPJ. Our data thus argue for a significant role of the TPJ in human global Gestalt perception.

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Section: Discussionmentioning

confidence: 94%

The role of temporo-parietal junction (TPJ) in global Gestalt perception

Huberle

Karnath

2011

Brain Struct Funct

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“…These activation foci were in accordance with existing literature. The fusiform gyrus is known to be related to the visual processing of objects (Rao, Zhou, Zhou, Fan, & Chen, 2003;Kanwisher, Woods, Iacoboni, & Mazziotta, 1997). Furthermore, a recent study by Schumacher and D'Esposito (2002) reported a dissociation of extrastriate visual areas and a fronto-parietal network related to stimulus encoding and response selection.…”

Section: Discussionmentioning

confidence: 99%

Decomposing Components of Task Preparation with Functional Magnetic Resonance Imaging

Braß

Cramon

2004

Journal of Cognitive Neuroscience

281

225

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It is widely acknowledged that the prefrontal cortex plays a major role in cognitive control processes. One important experimental paradigm for investigating such higher order cognitive control is the task-switching paradigm. This paradigm investigates the ability to switch flexibly between different task situations. In this context, it has been found that participants are able to anticipatorily prepare an upcoming task. This ability has been assumed to reflect endogenous cognitive control. However, it is difficult to isolate task preparation process from task execution using functional magnetic resonance imaging (fMRI). In the present study, we introduce a new experimental manipulation to investigate task preparation with fMRI. By manipulating the number of times a task was prepared, we could demonstrate that the left inferior frontal junction (IFJ) area (near the junction of inferior frontal sulcus and inferior precentral sulcus), the right inferior frontal gyrus, and the right intraparietal sulcus are involved in task preparation. By manipulating the cue-task mapping, we could further show that this activation is not related to cue encoding but to the updating of the relevant task representation. Based on these and previous results, we assume that the IFJ area constitutes a functionally separable division of the lateral prefrontal cortex. Finally, our data suggest that task preparation does not differ for switch and repetition trials in paradigms with a high proportion of switch trials, casting doubt on the assumption that an independent task set reconfiguration process takes place in the preparation interval.

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“…The only statistically significant between-group difference in activations, specifically within these commonly activated regions, was increased activation in the right angular gyrus (BA39) (Horwitz et al, 1998) of the posterior parietal cortex in musicians. BA39 has been reported to be activated during spatial localization (Rao et al, 2003), visuospatial attention (Nobre et al, 1997), coordinate judgment, and spatial memory (Chambers et al, 2004). Neuroanatomical and neurophysiological studies suggest a functional coupling between parietal and motor cortices when transforming perception into action (Rizzolatti et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Broca's Area Supports Enhanced Visuospatial Cognition in Orchestral Musicians

Brooks²,

et al. 2007

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We provide neurobehavioral evidence supporting the transferable benefit of music training to alter brain function and enhance cognitive performance in a nonmusical visuospatial task in professional orchestral musicians. In particular, orchestral musicians' performance on a three-dimensional mental rotation (3DMR) task exhibited the behavioral profile normally only attained after significant practice, supporting the suggestion that these musicians already possessed well developed neural circuits to support 3DMR. Furthermore, functional magnetic resonance imaging revealed that only orchestral musicians showed significantly increased activation in Broca's area, in addition to the well known visuospatial network, which was activated in both musicians and nonmusicians who were matched on age, sex, and verbal intelligence. We interpret these functional neuroimaging findings to reflect preferential recruitment of Broca's area, part of the neural substrate supporting sight reading and motor-sequence organization underpinning musical performance, to subserve 3DMR in musicians. Our data, therefore, provide convergent behavioral and neurofunctional evidence supporting the suggestion that development of the sight-reading skills of musical performance alters brain circuit organization which, in turn, confers a wider cognitive benefit, in particular, to nonmusical visuospatial cognition in professional orchestral musicians.

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Spatiotemporal activation of the two visual pathways in form discrimination and spatial location: A brain mapping study

Cited by 34 publications

References 35 publications

The role of temporo-parietal junction (TPJ) in global Gestalt perception

The role of temporo-parietal junction (TPJ) in global Gestalt perception

Decomposing Components of Task Preparation with Functional Magnetic Resonance Imaging

Broca's Area Supports Enhanced Visuospatial Cognition in Orchestral Musicians

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