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Related Experiment Videos

Space and the parietal cortex.

Masud Husain1, Parashkev Nachev

  • 1Institute of Cognitive Neuroscience, University College, London, 17 Queen Square, London WC1N 3AR, UK. m.husain@ion.ucl.ac.uk

Trends in Cognitive Sciences
|December 1, 2006
PubMed
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The human inferior parietal lobe (IPL) plays a complex role beyond spatial processing. New research shows distinct non-spatial functions in the IPL, challenging traditional brain stream models.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroanatomy

Background:

  • The human inferior parietal lobe (IPL) is difficult to categorize within the traditional dorsal/ventral stream model.
  • Right IPL lesions are linked to spatial deficits like hemispatial neglect, suggesting a primary spatial role.

Purpose of the Study:

  • To review current findings on the functional repertoire of the parietal cortex.
  • To challenge the simple dorsal/ventral dichotomy by highlighting non-spatial functions of the IPL.

Main Methods:

  • Review of existing neuroimaging and lesion studies.
  • Analysis of functional attributes of different parietal sub-regions.

Main Results:

  • The IPL is involved in non-spatial functions including attention control and salient event detection.

Related Experiment Videos

  • While superior parietal regions and the intraparietal sulcus support spatial processing, inferior parietal regions exhibit distinct non-spatial attributes.
  • These non-spatial functions do not fit neatly into conventional 'dorsal' or 'ventral' categorizations.

    • Conclusions:

    • The functional organization of the parietal cortex is more complex than a simple dorsal/ventral stream division.
    • The human IPL possesses critical non-spatial functions that expand our understanding of its role in cognition.
    • Future research should consider these diverse functions when modeling parietal cortex organization.