Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: 35, Pages: 1-7
T. Alavanthar1*, K. Manikanda Raja2 and S. K. Pandiyan3
1 School of Electrical and Electronics Engineering, SASTRA University, Thanjavur - 613401, Tamil Nadu, India; [email protected];
2 School of Chemical and Biotechnology, SASTRA University, Thanjavur - 613401, Tamil Nadu, India; [email protected]
3 Centre for Nonlinear Science and Engineering, SASTRA University, Thanjavur - 613401, Tamil Nadu, India; [email protected]
Photo transduction in human eye can be segmented into different electrical components by proper analysis of their work on the action potential with electrophysiological studies. J. H. Van Hateren, designed a computational model of primate retinal system with the aim of mimicking the human visual system as an electrical device for retinal implants in the future, but the model suffered from chromaticity adaptation and the existence of after images. This article concentrates in studying the model by simulating with different values and stating why generic value fit is taken into consideration, while others are not. The choice of generic value for the inactivation reaction of photopigment and phosphodiesterase is reasoned in greater detail. This paper states the flaws present in the previous mentioned computational model and put forth that photoreceptor works as a band pass filter and not as low pass filter which might help to overcome chromotacity adaptation in the given model.
Keywords: Computational Model, Chromaticity Adaptation, ERG, Photoreceptor, Primate Retinal System, Photopigment, Phosphodiesterase
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