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Related Experiment Video

Updated: Jun 26, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

Synchrony and the binding problem in macaque visual cortex.

Yi Dong¹, Stefan Mihalas, Fangtu Qiu

¹Zanvyl Krieger Mind/Brain Institute, and Department of Neuroscience, Johns Hopkins University, Baltimore, MD, USA. doyen@pha.jhu.edu

Journal of Vision

|January 17, 2009

Summary

The binding-by-synchrony hypothesis, suggesting synchronized neural firing forms object representations, was not supported. Synchrony between neurons did not depend on binding conditions, but correlated with border-ownership selectivity, indicating network connectivity.

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Last Updated: Jun 26, 2026

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

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Published on: August 1, 2018

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Targeted Labeling of Neurons in a Specific Functional Micro-domain of the Neocortex by Combining Intrinsic Signal and Two-photon Imaging

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Published on: December 12, 2012

Area of Science:

Neuroscience
Computational Neuroscience
Visual Perception

Background:

The binding-by-synchrony hypothesis posits that synchronized neuronal activity links features to form object representations.
Understanding how the brain binds visual features into coherent objects is a fundamental question in neuroscience.

Purpose of the Study:

To experimentally test the binding-by-synchrony hypothesis in the primate visual cortex.
To investigate the relationship between neuronal synchrony, feature binding, and border ownership selectivity.

Main Methods:

Recorded spike activity from 32 pairs of neurons in macaque visual cortex during a fixation task.
Manipulated visual stimuli to create one-figure and two-figure conditions to test binding.
Assessed neuronal synchrony and border ownership selectivity, correcting for firing rate effects.

Main Results:

Neuronal synchrony did not differ between the one-figure and two-figure binding conditions.
Synchrony between neuron pairs was correlated with border ownership selectivity in both neurons.
These findings suggest synchrony reflects underlying network connectivity rather than direct binding mechanisms.

Conclusions:

The study found no evidence to support the binding-by-synchrony hypothesis.
Neuronal synchrony appears to reflect network connectivity related to border ownership assignment.
Alternative mechanisms may underlie the neural basis of visual object binding.