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Related Experiment Video

Updated: Apr 16, 2026

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents

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Published on: May 23, 2025

Spatial frequency processing in scene-selective cortical regions.

Louise Kauffmann¹, Stephen Ramanoël², Nathalie Guyader³

¹Univ. Grenoble Alpes, LPNC, F-38040 Grenoble, France; CNRS, LPNC UMR 5105, F-38040 Grenoble, France.

|March 11, 2015

Summary

This summary is machine-generated.

This study reveals how the brain processes visual scenes. Different brain regions, like the parahippocampal place area (PPA), respond uniquely to spatial frequencies and contrast, influencing scene perception.

Keywords:

Occipital place area Parahippocampal place area Retrosplenial cortex Root mean square contrast Spatial frequencies

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Topographical Estimation of Visual Population Receptive Fields by fMRI

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Topographical Estimation of Visual Population Receptive Fields by fMRI

Topographical Estimation of Visual Population Receptive Fields by fMRI

Published on: February 3, 2015

Area of Science:

Neuroscience
Visual Perception
Cognitive Neuroscience

Background:

Visual scene analysis involves processing attributes at various spatial frequencies.
Low spatial frequencies (LSF) provide coarse information with high contrast, while high spatial frequencies (HSF) offer fine details with low contrast.

Purpose of the Study:

To investigate the differential responses of scene-selective brain regions (PPA, RSC, OPA) to spatial frequencies.
To determine the influence of contrast equalization on these spatial frequency responses.
To understand the interplay between spatial frequency, contrast, and brain activity in scene processing.

Main Methods:

Functional magnetic resonance imaging (fMRI) study involving participants performing a scene categorization task.
Stimuli included low spatial frequency (LSF), high spatial frequency (HSF), and non-filtered (NF) scenes.
Contrast was manipulated by either leaving it unmodified or equalizing it using root-mean-square contrast normalization.

Main Results:

In the parahippocampal place area (PPA), LSF and NF scenes showed greater activation than HSF scenes without contrast equalization. With equalization, PPA became selective to HSF.
The retrosplenial cortex (RSC) responded more to LSF and NF scenes than HSF scenes when contrast was unmodified. No spatial frequency effect was observed in RSC after contrast equalization.
The occipital place area (OPA) consistently showed selective activation to HSF, regardless of contrast manipulation.

Conclusions:

PPA activity in scene processing is influenced by the interaction between spatial frequency and contrast.
The RSC appears sensitive to high-contrast information in scenes.
The OPA demonstrates a consistent selectivity for high spatial frequencies during scene perception.