Related Experiment Video
Updated: Jun 19, 2025

Visualizing Visual Adaptation
Published on: April 24, 2017
Gamma Responses to Colored Natural Stimuli Can Be Predicted from Local Low-Level Stimulus Features
Sidrat Tasawoor Kanth1,2, Supratim Ray3,2
1IISc Mathematics Initiative, Indian Institute of Science, Bangalore 560012, India.
Abstract:
The role of gamma rhythm (30-80 Hz) in visual processing is debated; stimuli like gratings and hue patches generate strong gamma, but many natural images do not. Could image gamma responses be predicted by approximating images as gratings or hue patches? Surprisingly, this question remains unanswered, since the joint dependence of gamma on multiple features is poorly understood. We recorded local field potentials and electrocorticogram from two female monkeys while presenting natural images and parametric stimuli varying along several feature dimensions. Gamma responses to different grating/hue features were separable, allowing for a multiplicative model based on individual features. By fitting a hue patch to the image around the receptive field, this simple model could predict gamma responses to chromatic images across scales with reasonably high accuracy. Our results provide a simple "baseline" model to predict gamma from local image properties, against which more complex models of natural vision can be tested.
More Related Videos
07:34A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
Published on: March 25, 2014
08:33Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
Published on: February 26, 2016
Related Concept Videos
Color Vision
Photoreceptors and Visual Pathways
Anatomy of the Eyeball
Vision
The Retina
Channel Rhodopsins
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...