Brain Topography

, Volume 21, Issue 3–4, pp 269–274 | Cite as

A Putative Model of Multisensory Object Representation

Review

Abstract

This review surveys the recent literature on visuo-haptic convergence in the perception of object form, with particular reference to the lateral occipital complex (LOC) and the intraparietal sulcus (IPS) and discusses how visual imagery or multisensory representations might underlie this convergence. Drawing on a recent distinction between object- and spatially-based visual imagery, we propose a putative model in which LOtv, a subregion of LOC, contains a modality-independent representation of geometric shape that can be accessed either bottom-up from direct sensory inputs or top-down from frontoparietal regions. We suggest that such access is modulated by object familiarity: spatial imagery may be more important for unfamiliar objects and involve IPS foci in facilitating somatosensory inputs to the LOC; by contrast, object imagery may be more critical for familiar objects, being reflected in prefrontal drive to the LOC.

Keywords

Cross-modal Visual Haptic Imagery 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Simon Lacey
    • 1
  • Noa Tal
    • 2
  • Amir Amedi
    • 2
    • 3
  • K. Sathian
    • 1
    • 4
    • 5
    • 6
  1. 1.Department of NeurologyEmory University School of MedicineAtlantaUSA
  2. 2.Physiology Department, Faculty of MedicineThe Hebrew University of JerusalemJerusalemIsrael
  3. 3.Cognitive Science ProgramThe Hebrew University of JerusalemJerusalemIsrael
  4. 4.Department of Rehabilitation MedicineEmory UniversityAtlantaUSA
  5. 5.Department of PsychologyEmory UniversityAtlantaUSA
  6. 6.Rehabilitation R&D Center of ExcellenceAtlanta VAMCDecaturUSA

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