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Related Concept Videos

The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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Electrical Synapses

Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
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The Synapse02:47

The Synapse

Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
Synaptic Signaling01:09

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond
08:08

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Published on: June 24, 2015

Electrotonic coupling between pyramidal neurons in the neocortex.

Yun Wang1, Amey Barakat, Hongwei Zhou

  • 1Caritas St. Elizabeth's Medical Center, Tufts University, Boston, MA 02135, USA. yun.wang@tufts.edu

Plos One
|May 4, 2010
PubMed
Summary
This summary is machine-generated.

Electrotonic couplings between pyramidal cells (PCs) in the neocortex are rare but possess high conductance, enabling synchronized action potential firing. This discovery offers new insights into neuronal network synchronization.

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A Computer-assisted Multi-electrode Patch-clamp System
11:01

A Computer-assisted Multi-electrode Patch-clamp System

Published on: October 18, 2013

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Cellular Neuroscience

Background:

  • Electrotonic couplings, or electrical synapses, are vital for neuronal synchronization, impacting physiological functions and diseases.
  • While interneuron electrical synapses are well-studied, those between pyramidal cells (PCs) in the neocortex remain largely uncharacterized.

Purpose of the Study:

  • To investigate the electrophysiological, anatomical, and synaptological properties of electrotonic couplings between PCs in the neocortex.
  • To understand the role of PC-PC electrotonic couplings in neuronal synchronization.

Main Methods:

  • Utilized multiple patch-clamp recordings combined with infrared videomicroscopy (IR-DIC).
  • Employed histochemical staining and 3D-computer reconstruction.
  • Recorded from PCs in ferret and rat medial prefrontal and visual cortical regions.

Main Results:

  • Electrotonic couplings between PCs were infrequently recorded but exhibited high junctional conductance.
  • These couplings allowed direct transmission of action potentials (APs) and tonic firing, leading to perfectly synchronized AP firing between coupled PCs.
  • Postjunctional responses alternated between APs and spikelets, with spikelet summation driving AP firing at high frequencies.

Conclusions:

  • PC-PC electrotonic couplings in the neocortex possess unique properties, including high conductance and precise synchronization capabilities.
  • These findings align with simulation predictions for neuronal assembly synchronization.
  • PC electrotonic couplings likely play a distinct and crucial role in neocortical neuronal synchronization.