Modeling and estimation problems in the turtle visual cortex

Zoran Nenadic, Bijoy K. Ghosh, Philip S. Ulinski

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


The goal of this paper is to verify that position and velocity of a spot of light incident on the retina of a turtle are encoded by the spatiotemporal dynamics of the cortical waves they generate. This conjecture is examined using a biophysically realistic large-scale computational model of the visual cortex implemented with the software package, GENESIS. The cortical waves are recorded and analyzed using principal components analysis and the position and velocity information from visual space is mapped onto an abstract B-space, to be described, using the coefficients of the principal components expansion. The likely values of the position/velocity are estimated using standard statistical detection methods.

Original languageEnglish
Pages (from-to)753-762
Number of pages10
JournalIEEE Transactions on Biomedical Engineering
Issue number8
StatePublished - 2002


  • Cortical wave
  • Detection
  • Principal components
  • Visual cortex


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