Functional dissociation of multiple-object tracking mechanisms based on hemispheric asymmetries.

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  • Additional Information
    • Source:
      Publisher: IOS Press Country of Publication: Netherlands NLM ID: 9005499 Publication Model: Print Cited Medium: Internet ISSN: 1878-3627 (Electronic) Linking ISSN: 09226028 NLM ISO Abbreviation: Restor Neurol Neurosci Subsets: MEDLINE
    • Publication Information:
      Publication: Amsterdam : IOS Press
      Original Publication: Amsterdam : Elsevier Science Publishers BV, c1989-
    • Subject Terms:
      Attention/*physiology ; Functional Laterality/*physiology ; Motion Perception/*physiology ; Reaction Time/*physiology ; Stroke/*diagnostic imaging; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Photic Stimulation/methods ; Stroke/physiopathology ; Stroke Rehabilitation/methods
    • Abstract:
      Background: A number of theoretical accounts have been put forward to explain the ability to simultaneously track multiple visually indistinguishable objects over a period of time. Serial processing models of visual tracking focus on the maintenance of the spatial locations of every single item over time. A more recent mechanism describes multiple object tracking as the ability to maintain a higher order representation of an abstract spatial configuration built by the illusory connection of the tracked items through their transition.
      Objective: The current study investigates the correspondence between these serial and parallel tracking accounts and the right hemispheric specialization for the space-based vs. left hemispheric for object-based attentional processing.
      Methods: Electrophysiological brain responses were recorded in two groups of patients with right- and left hemispheric lesions while performing in a multiple object tracking task.
      Results: The results suggest a failure to distinguish single item information for the right hemispheric patients accompanied by the absence of a known electrophysiological marker associated with single item tracking. Importantly, left hemispheric patients showed a graded behavioral and electrophysiological response to probe stimuli as a function of the congruence of the probe with the relevant target stimuli.
      Conclusions: The current data suggest that the differential contribution of serial and parallel tracking mechanisms during object tracking can partly be explained by the different functional contributions of the right and left brain hemispheres.
    • Publication Date:
      Date Created: 20201216 Date Completed: 20211026 Latest Revision: 20211026
    • Publication Date:
      20240829
    • Accession Number:
      10.3233/RNN-201048
    • Accession Number:
      33325416