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Modulation ratio of layer 2/3 cells in primary visual cortex: A model based study | IEEE Conference Publication | IEEE Xplore

Modulation ratio of layer 2/3 cells in primary visual cortex: A model based study


Abstract:

Through a reaction-diffusion based model we have studied modulation ratio (MR) in layer 2/3 cells in cat primary visual cortex. The reaction-diffusion based developmental...Show More

Abstract:

Through a reaction-diffusion based model we have studied modulation ratio (MR) in layer 2/3 cells in cat primary visual cortex. The reaction-diffusion based developmental model is based on resource limited competition and diffusive cooperation among neighboring cells. We have obtained receptive fields (RFs) and responses of binocular cells in layer 2/3. The ON-OFF subregion overlap in RF is quantified. We observe a significant correlation between RF ON-OFF subregion overlap and MR. For almost all the cells in layer 2/3 MR <; 1 when MR is obtained from membrane potential. Non-linearity of spiking mechanism makes a significant number of cells to have MR> 1 and behave as simple cells. Based on modulation index from spiking response our modelled layer 2/3 cell population has 76% complex cells and 24% simple cells. We find that local lateral connections have less influence on MR but improve the tuning characteristics of cells significantly.
Date of Conference: 12-17 July 2015
Date Added to IEEE Xplore: 01 October 2015
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Conference Location: Killarney, Ireland

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