Concept

Photorécepteur (biologie)

Publications associées (190)

Retina Color-Opponency Based Pursuit Implemented Through Spiking Neural Networks in the Neurorobotics Platform

Marc-Oliver Gewaltig, Egidio Falotico, Lorenzo Vannucci, Paul Levi, Georg Hinkel, Stefan Ulbrich, Alessandro Ambrosano, Ugo Albanese, Murat Kirtay

The 'red-green' pathway of the retina is classically recognized as one of the retinal mechanisms allowing humans to gather color information from light, by combining information from L-cones and M-cones in an opponent way. The precise retinal circuitry tha ...

Springer Int Publishing Ag2016

Overcoming the resolution limit in retinal imaging using the scattering properties of the sclera

Demetri Psaltis, Christophe Moser, Timothé Laforest, Dino Carpentras

In-vivo imaging of the eye's fundus is widely used to study eye's health. State of the art Adaptive Optics devices can resolve features up to a lateral resolution of 1.5 um. This resolution is still above what is needed to observe subcellular structures su ...

Spie-Int Soc Optical Engineering2016

The Honeycomb illusion: Uniform textures not perceived as such

Michael Herzog

We present a series of patterns, in which texture is perceived differently at fixation in comparison to the periphery, such that a physically uniform stimulus yields a nonuniform percept. We call this the Honeycomb illusion, and we discuss it in relation t ...

2016

Light-driven model for identifying indicators of non-visual health potential in the built environment

María Lovísa Ámundadóttir

This thesis introduces a new approach to characterize and evaluate ocular light exposure based on the discovery of novel blue light-sensitive photoreceptors in the human eye. These photoreceptors are the primary mediators of 'non-visual' responses impactin ...

EPFL2016

Electrically shielded dielectric elastomer actuators for the study of the mechanical perturbation of cardiomyocytes

Herbert Shea, Matthias Imboden, Samuel Rosset, Alexandre Poulin, Etienne de Coulon

We present the development of a mechanically active bioreactor. Using dielectric elastomer actuators (DEA), we are able to mechanically perturb cell cultures in a controlled environment. With tailored pre-strain and compliant electrodes, it is possible to ...

2016

A CMOS Amperometric System for Multi-Neurotransmitter Detection

Giovanni De Micheli, Sandro Carrara

In vivo multi-target and selective concentration monitoring of neurotransmitters can help to unravel the brain chemical complex signaling interplay. This paper presents a dedicated integrated potentiostat transducer circuit and its selective electrode inte ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Towards a new generation of fibre-optic chemical sensors based on spider silk threads

Luc Thévenaz, Isabelle Dicaire, Kenny Hey Tow, Desmond Chow Ming Chia

A spider uses up to seven different types of silk, all having specific functions, to build its web. For scientists, native silk - directly extracted from spiders - is a tough, biodegradable and biocompatible thread used mainly for tissue engineering and te ...

Ieee2016

Differential Dimerization of Variants Linked to Enhanced S-Cone Sensitivity Syndrome (ESCS) Located in the NR2E3 Ligand-Binding Domain

Nicolas Jean Philippe Guex, Pascal Escher

NR2E3 encodes the photoreceptor-specific nuclear hormone receptor that acts as a repressor of cone-specific gene expression in rod photoreceptors, and as an activator of several rod-specific genes. Recessive variants located in the ligand-binding domain (L ...

Wiley-Blackwell2015

A unified framework for evaluating non-visual spectral effectiveness of ocular light exposure: key concepts

Marilyne Andersen, María Lovísa Ámundadóttir, Steven W. Lockley

The first evidence for a novel type of photoreceptor in humans was published in the form of an action spectrum for melatonin suppression. This action spectrum has very different spectral sensitivities compared to rod and cone photoreceptors. This discovery ...

2015

Gene therapy and bioengineering for retinal diseases: what is the future?

Diego Ghezzi

Sight restoration after retinal degeneration still represents an unmet goal. Since therapeutic strategies increasingly require interdisciplinary competencies, photoreceptor degeneration is attracting several research areas, including: life science, materia ...

2015

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