An image-computable model for the stimulus selectivity of gamma oscillations

Dora Hermes, Natalia Petridou, Kendrick N. Kay, Jonathan Winawer

Research output: Contribution to journalArticle

Abstract

Gamma oscillations in visual cortex have been hypothesized to be critical for perception, cognition, and information transfer. However, observations of these oscillations in visual cortex vary widely; some studies report little to no stimulus-induced narrowband gamma oscillations, others report oscillations for only some stimuli, and yet others report large oscillations for most stimuli. To better understand this signal, we developed a model that predicts gamma responses for arbitrary images and validated this model on electrocorticography (ECoG) data from human visual cortex. The model computes variance across the outputs of spatially pooled orientation channels, and accurately predicts gamma amplitude across 86 images. Gamma responses were large for a small subset of stimuli, differing dramatically from fMRI and ECoG broadband (non-oscillatory) responses. We propose that gamma oscillations in visual cortex serve as a biomarker of gain control rather than being a fundamental mechanism for communicating visual information.

Original languageEnglish (US)
JournaleLife
Volume8
DOIs
StatePublished - Nov 8 2019

Fingerprint

Visual Cortex
Gain control
Biomarkers
Cognition
Magnetic Resonance Imaging
Electrocorticography

Keywords

  • ecog
  • gamma oscillations
  • human
  • modeling
  • neuroscience
  • visual cortex

ASJC Scopus subject areas

  • Neuroscience(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

An image-computable model for the stimulus selectivity of gamma oscillations. / Hermes, Dora; Petridou, Natalia; Kay, Kendrick N.; Winawer, Jonathan.

In: eLife, Vol. 8, 08.11.2019.

Research output: Contribution to journalArticle

Hermes, Dora ; Petridou, Natalia ; Kay, Kendrick N. ; Winawer, Jonathan. / An image-computable model for the stimulus selectivity of gamma oscillations. In: eLife. 2019 ; Vol. 8.
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