Cited by 51Visual perception and processing mechanismsHemispheric Asymmetry in NeuroscienceSpatial Neglect and Hemispheric Dysfunction

The Left Intraparietal Sulcus Modulates the Selection of Low Salient Stimuli

Mevorach, Carmel, Shalev, Lilach, Allen, Harriet A., Humphreys, Glyn W.·2008·Journal of Cognitive Neuroscience

Abstract

Neuropsychological and functional imaging studies have suggested a general right hemisphere advantage for processing global visual information and a left hemisphere advantage for processing local information. In contrast, a recent transcranial magnetic stimulation study [Mevorach, C., Humphreys, G. W., & Shalev, L. Opposite biases in salience-based selection for the left and right posterior parietal cortex. Nature Neuroscience, 9, 740–742, 2006b] demonstrated that functional lateralization of selection in the parietal cortices on the basis of the relative salience of stimuli might provide an alternative explanation for previous results. In the present study, we applied a whole-brain analysis of the functional magnetic resonance signal when participants responded to either the local or the global levels of hierarchical figures. The task (respond to local or global) was crossed with the saliency of the target level (local salient, global salient) to provide, for the first time, a direct contrast between brain activation related to the stimulus level and that related to relative saliency. We found evidence for lateralization of salience-based selection but not for selection based on the level of processing. Activation along the left intraparietal sulcus (IPS) was found when a low saliency stimulus had to be selected irrespective of its level. A control task showed that this was not simply an effect of task difficulty. The data suggest a specific role for regions along the left IPS in salience-based selection, supporting the argument that previous reports of lateralized responses to local and global stimuli were contaminated by effects of saliency.

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  • Pre-SMA is associated with monitoring and selecting appropriate motor response output, and the superior parietal gyrus has an essential role in re-directing attention by promoting attention allocation to nonspatial properties of stimuli.

    “Pre-SMA is associated with monitoring and selecting appropriate motor response output (Nachev et al. 2008; Iannaccone et al. 2015) and the superior parietal gyrus has an essential role in re-directing attention by promoting attention allocation to nonspatial properties of stimuli (Mevorach et al. 2009; Wang et al. 2015).”

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Authors
Mevorach, C., Shalev, L., Allen, H. A., & Humphreys, G. W.
Affiliations
  • University of Birmingham (GB)
  • Hebrew University of Jerusalem (IL)
Venue
Journal of Cognitive Neuroscience
Published
2008-02-01
Volume
21
Issue
2
Pages
303-315
ISSN
  • 0898-929X (ISSN-L)
  • 1530-8898
OpenAlex
W2099851939
Cited by
51
References
60
Citations by year
2023: 2 · 2022: 3 · 2021: 1 · 2020: 3 · 2019: 1 · 2018: 4 · 2017: 5 · 2016: 5 · 2015: 2 · 2014: 4 · 2013: 2 · 2012: 4
FWCI
2.58
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cognitive Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • University of Birmingham Institutional Research Archive (University of Birmingham) (acceptedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
Funders
Biotechnology and Biological Sciences Research Council
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hemispheric Asymmetry in Neuroscience
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Spatial Neglect and Hemispheric Dysfunction
Keywords
intraparietal sulcus, visual attention, hemispheric lateralization, local versus global processing, posterior parietal cortex, stimulus saliency, transcranial magnetic stimulation
MeSH terms
Adult, Female, Humans, Functional Laterality, Magnetic Resonance Imaging, Male, Parietal Lobe, Pattern Recognition, Visual, Photic Stimulation, Vision, Ocular, Visual Perception

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