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The Effects of Feedback Signals Mediated by NMDA-Type Synapses for Modulating Border-Ownership Selective Neurons in Visual Cortex

  • Nobuhiko Wagatsuma
  • Hirotoshi Konno
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11301)

Abstract

The mean firing rate of a Border-Ownership Selective (BOS) neuron in intermediate-level visual areas represents where a figure direction from its classical receptive field. Recent neurophysiological and computational studies implied that slow modulatory feedback signals mediated by NMDA synaptic currents played an important role for modulating the responses and dynamics of BOS neurons. In order to understand the effects of modulatory feedback signals for modulating the responses of BOS neurons in more detail, we analyzed the simulation data of BOS model neurons through the jitter methods for computing tight synchrony with various ranges of jitter window. In the millisecond range of the jitter window, tight synchrony for the pairs of BOS model neurons was not modulated by selective attention. However, when the jitter window was widened, attention markedly decreased the magnitude of the tight synchrony for BOS model neurons. These behaviors of model neurons were in good agreement with the characteristics of neurophysiological BOS neurons, supporting a critical role of the modulatory feedback signals for modulating the responses of BOS neurons in intermediate-level visual areas. These results provide testable predictions for understanding the neural mechanism of figure-ground segregation and object perception.

Keywords

Border-Ownership Spike synchrony Jitter analysis Modulatory input 

Notes

Acknowledgements

This work was partly supported by KAKENHI (no. 17K12704).

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Toho UniversityFunabashiJapan
  2. 2.Tokyo Denki UniversitySaitamaJapan

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