Search research articles

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

Search research articles

Related Experiment Videos

Coding of border ownership in monkey visual cortex.

H Zhou¹, H S Friedman, R von der Heydt

¹Krieger Mind/Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|August 31, 2000

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

Disease-free survival as surrogate for overall survival in real-world settings for esophageal cancer: an analysis of SEER-Medicare data.

ESMO open·2024

Same author

Meta-analyses of the efficacy of pharmacotherapies and sublingual allergy immunotherapy tablets for allergic rhinitis in adults and children.

Rhinology·2021

Same author

Exploring factors associated with health disparities in asthma and poorly controlled asthma among school-aged children in the U.S.

The Journal of asthma : official journal of the Association for the Care of Asthma·2019

Same author

The national burden of poorly controlled asthma, school absence and parental work loss among school-aged children in the United States.

The Journal of asthma : official journal of the Association for the Care of Asthma·2017

Same author

Assessment of treatment patterns associated with injectable disease-modifying therapy among relapsing-remitting multiple sclerosis patients.

Multiple sclerosis journal - experimental, translational and clinical·2017

Same author

Personality dimensions and measures potentially relevant to health: A focus on hostility.

Annals of behavioral medicine : a publication of the Society of Behavioral Medicine·2013

Neurons in the visual cortex (V1, V2, V4) encode "border ownership," indicating how local features belong to objects. This finding reveals object-level processing beyond simple feature detection in early visual areas.

Area of Science:

Neuroscience
Visual Perception
Computational Neuroscience

Background:

Traditional models view V1 and V2 as processing local visual features.
The role of these areas in representing object-level information remains debated.

Purpose of the Study:

To investigate if neural responses in early visual areas encode object-level information.
To determine if neurons represent how local features belong to larger figures.

Main Methods:

Recorded single-unit activity in V1, V2, and V4 of behaving monkeys.
Presented stimuli where identical local features belonged to different figures or had reversed contrast.
Analyzed neural responses for modulation based on figure membership and contrast polarity.

Related Experiment Videos

Main Results:

Over 50% of V2 and V4 neurons, and 18% of top-layer V1 neurons, showed "border ownership coding."
A majority of these neurons also encoded local contrast polarity.
Border ownership signals emerged rapidly (<25 msec) and were largely independent of figure size.
Responses were influenced by visual stimulation outside the classical receptive field, suggesting global context integration.

Conclusions:

Neurons in V2 and V4, and to some extent V1, encode "border ownership," signifying object-level representation.
This processing occurs early in the visual pathway, likely within the visual cortex itself.
Findings challenge traditional views and highlight the role of early visual areas in object perception.