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Updated: May 5, 2026
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Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition
Published on: February 8, 2018
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Inhibition mediates top-down control of sensory processing
1Institute for Systems Research, Department of Electrical and Computer Engineering, University of Maryland College Park, College Park, MD 20742, USA; Department of Cognitive Studies, École Normale Supérieure, 75005 Paris, France.
Neuron
|November 26, 2013
Summary
Researchers used optogenetics to control inhibitory interneurons, discovering their significant role in regulating sensory information flow across cortical layers. This finding sheds light on how the brain adapts to sensory signals in noisy environments.
Area of Science:
- Neuroscience
- Sensory Processing
- Cortical Circuits
Background:
- Inhibitory interneurons play a crucial role in regulating neural activity and information flow within the brain.
- Understanding how these interneurons shape sensory responses is vital for comprehending perception and adaptation.
Purpose of the Study:
- To investigate the functional role of identified inhibitory interneurons in controlling sensory responses across cortical layers.
- To explore the potential contribution of these interneuron-mediated influences to adaptive sensory perception in naturalistic conditions.
Main Methods:
- Optogenetic stimulation of identified inhibitory interneurons in the cortex.
- Recording of sensory-evoked responses across different cortical layers.
Main Results:
- Optogenetic activation of inhibitory interneurons demonstrated a powerful capacity to control the flow of sensory information across cortical layers.
- These inhibitory influences significantly modulated the propagation of sensory signals.
Conclusions:
- Inhibitory interneurons exert substantial control over sensory information processing in the cortex.
- The findings suggest that these interneuron-mediated mechanisms are critical for the brain's rapid adaptive abilities in detecting and perceiving sensory signals, especially in noisy environments.
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