Cortical Inhibition
Cortical Inhibition - Related Videos
08:55
Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition
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Cited by 12 •
2018
We describe an experimental procedure to quantify excitability and inhibition of primary motor cortex during a motor response inhibition task by using Transcranial Magnetic Stimulation throughout the course of a Stop Signal Task.
00:46
Feedback Inhibition
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2019
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell! Since enzymes help control the rate of reactions, their activity is regulated so that appropriate amounts of starting materials, intermediate metabolites, and products are maintained in the cell. Excessive build-up or depletion of...
11:25
Isolation and Culture of Mouse Cortical Astrocytes
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Cited by 460 •
2013
Astrocytes have been recognized to be versatile cells participating in fundamental biological processes that are essential for normal brain development and function, and central nervous system repair. Here we present a rapid procedure to obtain pure mouse astrocyte cultures to study the biology of this major class of central nervous system cells.
08:49
Visualization of Cortical Modules in Flattened Mammalian Cortices
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Cited by 27 •
2018
This article describes a detailed methodology to obtain flattened tangential sections from mammalian cortices and visualize cortical modules using histochemical and immunohistochemical methods.
09:45
In vivo Imaging of Deep Cortical Layers using a Microprism
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Cited by 11 •
2009
Right-angle microprisms inserted into the mouse neocortex allows for deep imaging of multiple cortical layers with a viewpoint typically found in slice. One-millimeter microprisms offer a wide field-of-view (~900 μm) and spatial resolutions sufficient to resolve dendritic spines. We demonstrate layer V neuronal imaging and neocortical vascular imaging using microprisms.
FAQs
GABA released by inhibitory interneurons activates receptors that are permeable to chloride or potassium ions. This receptor activation lowers the likelihood that the target neuron will fire, thereby limiting the impact of excitatory inputs. The specific ion pathway provides a cellular mechanism through which local interneuron activity can regulate cortical information processing.
A controlled balance prevents cortical activity from becoming either insufficient or excessive. Inhibition helps shape how neurons respond during sensory processing, attention, learning, and motor output, while also contributing to coordinated neural synchrony. Changes in this balance can therefore affect both the content of information processing and the timing of activity across cortical networks.
Inhibitory interneurons provide the local cellular source of GABA-mediated control within the cortex. By acting on target neurons, they can reduce the likelihood of firing and constrain how activity spreads through nearby circuits. Their influence allows cortical networks to regulate responses rather than simply amplifying incoming signals, supporting organized sensory, motor, and cognitive processing.
Researchers investigate cortical inhibition through electrophysiology, pharmacology, and transcranial magnetic stimulation. Electrophysiology examines neuronal activity, pharmacology helps evaluate the contribution of inhibitory signaling, and transcranial magnetic stimulation provides a noninvasive way to study cortical responses. Using these approaches, investigators can relate inhibitory mechanisms to neural processing and altered function.
Transcranial magnetic stimulation is one approach for studying inhibitory function in the living cortex. It can be used alongside electrophysiology or pharmacology to examine how cortical activity is regulated and how that regulation relates to motor or other neural processes. This makes it useful for investigating both normal brain function and changes associated with neurological conditions.
Researchers examine altered cortical inhibition in epilepsy, movement disorders, autism, schizophrenia, and other neurological conditions. Comparing inhibitory function across healthy and affected systems can clarify how disrupted regulation relates to symptoms or abnormal neural activity. The same framework also supports research on attention, learning, sensory processing, motor output, and synchrony in the healthy brain.