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Related Experiment Video

Updated: Jan 26, 2026

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

Published on: September 11, 2017

A Normalization Circuit Underlying Coding of Spatial Attention in Primate Lateral Prefrontal Cortex.

Lyndon Duong^1,2, Matthew Leavitt^1,2,3, Florian Pieper⁴

¹Department of Physiology and Pharmacology, Western University, London, Ontario N6A 3K7, Canada.

|April 20, 2019

Summary

This summary is machine-generated.

Neurons in the lateral prefrontal cortex (LPFC) dynamically adjust their activity to focus voluntary attention. This neural computation shifts from averaging to a winner-take-all mechanism when attention is directed, aiding motor commands and filtering distracters.

Keywords:

attention macaque neurophysiology normalization prefrontal cortex

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Published on: February 25, 2022

Area of Science:

Neuroscience
Cognitive Neuroscience
Systems Neuroscience

Background:

The lateral prefrontal cortex (LPFC) is crucial for voluntary attention.
The specific neural computations governing attention allocation in the LPFC are not well understood.

Purpose of the Study:

To investigate the neural computations underlying voluntary attention allocation in the LPFC.
To characterize how LPFC neuronal activity changes during a visuospatial attention task.

Main Methods:

Neuronal ensembles in the LPFC of Macaca fascicularis were recorded.
A visuospatial attention task was employed to probe attentional modulation.
LPFC neural responses were analyzed under conditions of single and multiple stimuli with distracters.

Main Results:

LPFC neural responses were normalized by distracters, fitting an averaging computation.
Attentional deployment shifted neural activity from averaging towards a winner-take-all (WTA) regime.
Attentional modulation varied based on individual neuron's visuospatial tuning.

Conclusions:

LPFC neuronal ensemble activity during attentive vision can be decoded for motor commands.
Feedback mechanisms involving LPFC may filter distracter signals, enhancing target perception.