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Related Concept Videos

Neuronal Communication01:28

Neuronal Communication

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...
Neurons as Communicators of the Brain01:22

Neurons as Communicators of the Brain

Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
Cell Body
The cell body, also known...
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.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Synaptic Signaling01:12

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.
Overview of Synapses01:25

Overview of Synapses

A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...

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Related Experiment Video

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Vibrodissociation of Neurons from Rodent Brain Slices to Study Synaptic Transmission and Image Presynaptic Terminals
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Published on: May 25, 2011

What can neurons do for their brain? Communicate selectivity with bursts.

David Balduzzi1, Giulio Tononi

  • 1Department of Empirical Inference, Max Planck Institute for Intelligent Systems, Tuebingen, Germany. david.balduzzi@inf.ethz.ch

Theory in Biosciences = Theorie in Den Biowissenschaften
|September 8, 2012
PubMed
Summary

Neurons in the cortex use selective bursting to process environmental information. This bursting activity, regulated during sleep, ensures meaningful communication within neural networks.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Cortical neurons process environmental information indirectly through complex neural networks.
  • Spike activity in deep cortical neurons is heavily pre- and post-processed.
  • Understanding the functional role of bursting activity in information processing is crucial.

Purpose of the Study:

  • To propose information-theoretic constraints for spike production in deep cortical neurons.
  • To ensure bursting activity in the cortex meaningfully relates to environmental events.
  • To investigate the role of bursting in information transfer and credit assignment.

Main Methods:

  • Information-theoretic analysis of neural firing patterns.
  • Modeling of spike production constraints.
  • Analysis of information transfer within simulated neural networks.

Main Results:

  • Two key constraints identified: emphasizing selective responses with bursts and propagating selective inputs via burst-firing.
  • Demonstrated that these constraints are necessary for bursts to dominate information transfer in the cortex.
  • Showed that bursting provides a substrate for credit assignment among neurons.

Conclusions:

  • Selective bursting is essential for meaningful cortical information processing and credit assignment.
  • Synaptic plasticity can degrade selective bursting capabilities.
  • Homeostatic regulation of synaptic weights, particularly during sleep, is necessary to maintain selective bursting.