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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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Functional Brain Systems: Reticular Formation

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Related Experiment Video

Updated: Jun 3, 2026

Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings
10:24

Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings

Published on: January 10, 2015

Dense inhibitory connectivity in neocortex.

Elodie Fino1, Rafael Yuste

  • 1Howard Hughes Medical Institute, Department of Biological Sciences, Columbia University, New York, NY 10027, USA.

Neuron
|March 26, 2011
PubMed
Summary
This summary is machine-generated.

Local inhibitory neurons in the mouse frontal cortex exhibit dense and promiscuous connectivity with pyramidal cells. This suggests a non-specific wiring pattern in cortical microcircuits, forming a nearly completely connected matrix.

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Related Experiment Videos

Last Updated: Jun 3, 2026

Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings
10:24

Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings

Published on: January 10, 2015

Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition
08:55

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

Published on: February 8, 2018

Targeted Labeling of Neurons in a Specific Functional Micro-domain of the Neocortex by Combining Intrinsic Signal and Two-photon Imaging
11:24

Targeted Labeling of Neurons in a Specific Functional Micro-domain of the Neocortex by Combining Intrinsic Signal and Two-photon Imaging

Published on: December 12, 2012

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Cellular Neuroscience

Background:

  • The precise wiring of neocortical circuits remains largely unknown, with ongoing debate regarding specific neuronal connections.
  • Understanding the basic structure of cortical microcircuits is crucial for deciphering brain function.

Purpose of the Study:

  • To investigate the inhibitory connectivity patterns between specific interneurons and pyramidal cells in the mouse frontal cortex.
  • To determine if local inhibitory connectivity in the cortex is specific or promiscuous.

Main Methods:

  • Utilized a two-photon photostimulation technique for systematic synaptic connection mapping at single-cell resolution.
  • Focused on mapping inhibitory connections from somatostatin-positive GABAergic interneurons to pyramidal cells in upper cortical layers.

Main Results:

  • Demonstrated dense local inhibitory connectivity, with most or all inhibitory neurons connecting to every sampled pyramidal cell.
  • Observed similar inhibitory innervation patterns regardless of interneuron connectivity, indicating promiscuity.
  • Found this dense connectivity present in both young and mature developmental stages.

Conclusions:

  • Concluded that local inhibitory connectivity in the mouse frontal cortex is promiscuous, not forming distinct subnetworks.
  • Suggested that local inhibitory connectivity approaches the theoretical limit of a completely connected synaptic matrix.