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Related Experiment Video

Updated: Apr 22, 2026

Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging

Author Spotlight: Deciphering Neural Circuit Formation from Two-Photon Microscopy and Single Neuron Imaging

Published on: November 21, 2023

Attention can either increase or decrease spike count correlations in visual cortex.

Douglas A Ruff¹, Marlene R Cohen¹

¹Department of Neuroscience and Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.

Nature Neuroscience

|October 13, 2014

Summary

This summary is machine-generated.

Visual attention

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Area of Science:

Neuroscience
Cognitive Science
Computational Neuroscience

Background:

Visual attention modulates neural activity and response correlations.
Previous studies suggest attention decreases spike count correlation (rSC).
Two hypotheses exist: attention universally decreases rSC or flexibly alters it.

Purpose of the Study:

To investigate how visual attention affects neuronal correlations in area V4.
To test whether attention-based changes in rSC depend on neuronal task-relevant roles.

Main Methods:

Simultaneous multi-neuron recordings in area V4 of monkeys.
Monkeys performed a visual discrimination task.
Analysis of spike count correlations (rSC) under attended conditions.

Main Results:

Attention flexibly increased or decreased spike count correlations (rSC).
The direction of rSC change depended on whether neurons supported same or opposite choices.
Evidence supports the hypothesis that attention's effect on rSC is context-dependent.

Conclusions:

Neuronal correlations are dynamically regulated by attention based on behavioral relevance.
Findings challenge models assuming a uniform effect of attention on neuronal correlations.
Results provide constraints for understanding the neural basis of attention and decision-making.