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Related Experiment Video

Updated: Dec 17, 2025

Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition

Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition

Published on: February 8, 2018

Thalamocortical inhibitory dynamics support conscious perception.

Byoung-Kyong Min¹, Hyun Seok Kim², Dimitris A Pinotsis³

¹Department of Brain and Cognitive Engineering, Korea University, Seoul, 02841, Republic of Korea; McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

|June 23, 2020

Summary

Conscious perception of an illusory orange color was linked to specific thalamic activity and synchronized thalamocortical networks. This suggests thalamocortical inhibitory networks are key to conscious awareness and mental representations.

Keywords:

Conscious perception Thalamic reticular nucleus Thalamocortical inhibitory network

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Last Updated: Dec 17, 2025

Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition

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

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Published on: September 11, 2017

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Area of Science:

Neuroscience
Cognitive Science
Psychology

Background:

The precise neural mechanisms underlying conscious perception remain incompletely understood.
The role of thalamocortical interactions in conscious awareness is a subject of ongoing investigation.

Purpose of the Study:

To investigate the neurophysiological basis of conscious perception using visual stimuli.
To determine if thalamocortical interactions are essential for conscious awareness of mental representations.

Main Methods:

Presented rapid red/green color flickering stimuli to induce visual illusions.
Utilized magnetoencephalography (MEG) to record brain activity.
Analyzed thalamic and cortical activity patterns during conscious perception.

Main Results:

Observed 6-Hz thalamic activity coupled with thalamocortical inhibitory coupling during illusory orange perception.
Found sustained thalamic disinhibition and increased visual cortical activation during conscious awareness of the orange color.
Bayesian model comparison favored the thalamocortical model for conscious perception.

Conclusions:

Thalamocortical synchronization plays a crucial role in conscious awareness.
The thalamocortical inhibitory network acts as a gateway for conscious mental representations.
Provides neurophysiological evidence supporting the thalamocortical model of consciousness.