Hemispheric specialization for global and local processing: the effect of stimulus category

Fink, Gereon R.; Marshall, John C.; Halligan, Peter W.; Frith, C. D.; Frackowiak, R. S. J.; Dolan, Raymond J.

doi:10.1098/rspb.1997.0070

Cited by 131 publications

(87 citation statements)

References 25 publications

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“…For instance, of three studies in which positron emission tomography was used to asses brain activity during local and global processing, only one showed effects in the expected direction (Fink et al, 1996). The other two either failed to replicate this result (Heinze, Hinrichs, Scholz, Burchert, & Mangun, 1998) or even showed a reversed effect (Fink, Marshall, Halligan, Frith, & Frackowiak, 1997). Mixed results are also present in studies measuring event-related brain potentials (ERPs; e.g., Han, Fan, Chen, & Zhuo, 1999;Heinze & Münte, 1993;Johannes, Wieringa, Matzke, & Münte, 1996) as well as in neuropsychological studies.…”

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confidence: 76%

Hemispheric differences for the integration of stimulus levels and their contents: Evidence from bilateral presentations

Volberg

Hübner

2006

Perception & Psychophysics

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Several studies have demonstrated that hemispheric differences for the processing of hierarchical letter stimuli are more likely to occur when the letters at the levels are associated with conflicting responses. Typically, a single stimulus is presented, so that the conflict occurs between the global and the local levels of the same stimulus. Our hypothesis is that in this situation, conflict resolution requires integration of the letters and their respective levels and that the hemispheres differ in this integration process. According to this integration theory, the favorable effect of response conflict on hemispheric differences should vanish if other features, such as location, can also serve for conflict resolution. This prediction was tested in the present study by simultaneously presenting an individual hierarchical stimulus to each visual field. Conflicting letters either were arranged within one stimulus or were placed in different stimuli. In the latter case, a response conflict could also be resolved by integrating letters and locations. As was expected, there were no visual field effects in these conditions. On the other hand, visual field effects showed up when the conflicting letters were located within the same stimulus. These results support the idea that the hemispheres differ in their capacity for integrating level and form.

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confidence: 76%

Hemispheric differences for the integration of stimulus levels and their contents: Evidence from bilateral presentations

Volberg

Hübner

2006

Perception & Psychophysics

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“…A functional MRI (fMRI) study found similar hemispheric asymmetry in whole-part processing over the occipitotemporal cortical junctions (8). However, other studies failed to replicate such RH-whole/LH-part asymmetry (9).…”

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confidence: 83%

Global topological dominance in the left hemisphere

Wang

Zhou

Zhuo

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

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A series of experiments with right-handers demonstrated that the left hemisphere (LH) is reliably and consistently superior to the right hemisphere (RH) for global topological perception. These experiments generalized the topological account of lateralization to different kinds of topological properties (including holes, inside/ outside relation, and ''presence vs. absence'') in comparison with a broad spectrum of geometric properties, including orientation, distance, size, mirror-symmetry, parallelism, collinearity, etc. The stimuli and paradigms used were also designed to prevent subjects from using various nontopological properties in performing the tasks of topological discrimination. Furthermore, task factors commonly considered in the study of hemispheric asymmetry, such as response latency vs. accuracy, vertical vs. horizontal presentation, detection vs. recognition, and simultaneous vs. sequential judgment, were manipulated to not be confounding factors. Moreover, left-handed subjects were tested and showed the right lateralization of topological perception, in the opposite direction of lateralization compared with right-handers. In addition, the functional magnetic resonance imaging measure revealed that only a region in the left temporal gyrus was consistently more activated across subjects in the task of topological discrimination, consistent with the behavioral results. In summary, the global topological dominance in the LH is well supported by the converging evidence from the variety of paradigms and techniques, and it suggests a unified solution to the current major controversies on visual lateralization.visual lateralization ͉ perception ͉ temporal gyrus ͉ holes ͉ inside/outside relation

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“…The presence of the two pathways has also been suggested in humans in neuropsychological studies of patients 4)5) and by positron emission tomography (PET) in normal subjects [6][7][8] . Furthermore, it is known that brain function is related to attention, cognition and memory of visual spaces and objects are asymmetrically located in the left and right hemispheres [9][10][11] .…”

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confidence: 99%

EEG Gamma Band Is Asymmetrically Activated by Location and Shape Memory Tasks in Humans.

Numata

Nakajima

Shibata

et al. 2002

J Jpn Phys Ther Assoc

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Abstract. From the viewpoint of psychology, it is thought that perception analysis of the visual world includes two information processes: global (whole) and local (part) processes. It is assumed that the global process is carried out in the right hemisphere, and the local process, in the left hemisphere. In the present study, gamma EEG band activities during location memory (LM) task, as a global form, and shape memory (SM) task, as a local form, were calculated from the temporal, parietal and occipital areas using stimuli consisting of categorical patterns of small shapes. Gamma band activity during the SM task was greater than that during the LM task. It was assumed that the SM task requires a higher memory load condition than the LM task. In terms of the laterality ratio obtained from the whole electrode array, the gamma band was significantly activated in the right hemisphere during the LM task, and in the left hemisphere during the SM task. The gamma activation in the occipital area was significantly high in the right hemisphere for both tasks. High gamma band activation was observed in the right parietal area during the LM task and in the left temporal area during the SM task. It was concluded that global and local information processes occur in the left temporal areas and in the right occipitoparietal areas, respectively. The results of this study are useful in the assessment of visual cognition deficits in patients with cerebral hemispheric lesions in the physical therapy.

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Hemispheric specialization for global and local processing: the effect of stimulus category

Cited by 131 publications

References 25 publications

Hemispheric differences for the integration of stimulus levels and their contents: Evidence from bilateral presentations

Hemispheric differences for the integration of stimulus levels and their contents: Evidence from bilateral presentations

Global topological dominance in the left hemisphere

EEG Gamma Band Is Asymmetrically Activated by Location and Shape Memory Tasks in Humans.

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