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Plasticity-induced symmetry relationships between adjacent self-organizing topographic maps.

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  • المؤلفون: Sylvester J;Sylvester J; Reggia J
  • المصدر:
    Neural computation [Neural Comput] 2009 Dec; Vol. 21 (12), pp. 3429-43.
  • نوع النشر :
    Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.
  • اللغة:
    English
  • معلومة اضافية
    • المصدر:
      Publisher: MIT Press Country of Publication: United States NLM ID: 9426182 Publication Model: Print Cited Medium: Print ISSN: 0899-7667 (Print) Linking ISSN: 08997667 NLM ISO Abbreviation: Neural Comput Subsets: MEDLINE
    • بيانات النشر:
      Original Publication: Cambridge, Mass. : MIT Press, c1989-
    • الموضوع:
      Brain Mapping* ; Models, Neurological*; Neocortex/*cytology ; Neuronal Plasticity/*physiology ; Neurons/*physiology ; Space Perception/*physiology; Action Potentials/physiology ; Animals ; Computer Simulation ; Humans ; Sensation
    • نبذة مختصرة :
      In many species, adjacent topographic maps in sensory neocortex are found to be oriented as roughly mirror-image copies of one another. Here we use a computational model to show for the first time that, in principle, adjacent cortical topographic maps that are mirror-image symmetric along two dimensions can arise from activity-dependent changes if the distribution radius of afferents sufficiently exceeds that of horizontal intracortical interactions. We also find that infrequently, other types of intermap symmetry and previously unexpected map relationships (such as interlocking rotation, in which two adjacent maps become intertwined) can occur. These results support the hypothesis that activity-dependent synaptic changes play a more important role in forming the orientations of adjacent cortical maps than is currently recognized.
    • Grant Information:
      NS35460 United States NS NINDS NIH HHS
    • الموضوع:
      Date Created: 20090922 Date Completed: 20091229 Latest Revision: 20091113
    • الموضوع:
      20240829
    • الرقم المعرف:
      10.1162/neco.2009.04-08-763
    • الرقم المعرف:
      19764873