Search research articles

Search research articles

Related Experiment Videos

Interactions among spatial frequency and orientation channels adapted concurrently.

M W Greenlee¹, S Magnussen

¹Neurologische Universitätsklinik mit Abteilung für Neurophysiologie, Freiburg, F.R.G.

Vision Research

|January 1, 1988

Summary

This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Sample-based Maximum Likelihood Estimation of the Autologistic Model.

Journal of applied statistics·2024

Same author

Forecasting brain activity based on models of spatiotemporal brain dynamics: A comparison of graph neural network architectures.

Network neuroscience (Cambridge, Mass.)·2023

Same author

A graph neural network framework for causal inference in brain networks.

Scientific reports·2021

Same author

Hybridizing EMD with cICA for fMRI Analysis of Patient Groups.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2020

Same author

Do graphemes attract spatial attention in grapheme-color synesthesia?

Neuropsychologia·2017

Same author

Spurious correlations in simultaneous EEG-fMRI driven by in-scanner movement.

NeuroImage·2016

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Human visual system mechanisms for size and orientation were studied. Findings suggest inhibitory interactions between neural pathways processing retinal image size and orientation.

Area of Science:

Neuroscience
Visual Perception
Computational Neuroscience

Background:

The human visual system processes complex information about object size and orientation.
Understanding the neural mechanisms underlying these processes is crucial for visual science.

Purpose of the Study:

To investigate interactions between size- and orientation-specific neural mechanisms in the human visual system.
To determine how adaptation to visual stimuli affects contrast thresholds based on spatial frequency and orientation differences.

Main Methods:

Sequential adaptation technique using sinewave gratings with varying spatial frequencies and orientations.
Measurement of contrast thresholds for a test grating before and after adaptation.
Analysis of contrast threshold elevation as a function of spatial frequency and orientation differences.

Related Experiment Videos

Main Results:

Maximum contrast threshold elevation occurred when adapting gratings had identical spatial frequency and orientation.
Minimum threshold elevations were observed when spatial frequency differed by approximately 1.5 octaves or orientation by 45 degrees.
Threshold elevations approached baseline levels beyond these differences, with some falling below baseline.

Conclusions:

The results indicate the presence of inhibitory interactions between neural mechanisms sensitive to retinal image size and orientation.
These findings contribute to a deeper understanding of how the visual system segregates and integrates visual features.