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Related Concept Videos

Integration of Synaptic Events01:28

Integration of Synaptic Events

Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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.
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.
Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...

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Updated: Jun 14, 2026

An Automated T-maze Based Apparatus and Protocol for Analyzing Delay- and Effort-based Decision Making in Free Moving Rodents
07:42

An Automated T-maze Based Apparatus and Protocol for Analyzing Delay- and Effort-based Decision Making in Free Moving Rodents

Published on: August 2, 2018

Synaptic dynamics and decision making.

Gustavo Deco1, Edmund T Rolls, Ranulfo Romo

  • 1Department of Technology, Computational Neuroscience, Institució Catalana de Recerca i Estudis Avançats, Universitat Pompeu Fabra, 08018 Barcelona, Spain.

Proceedings of the National Academy of Sciences of the United States of America
|April 3, 2010
PubMed
Summary
This summary is machine-generated.

Neurons use synaptic facilitation to remember and combine sequential stimuli for decision-making. This mechanism, observed in partial differential neurons, aids brain networks in processing sequential sensory information.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • Sequential decision-making requires holding the first stimulus in memory for comparison with the second.
  • Neuronal firing rates are a common mechanism for encoding sensory stimuli.

Purpose of the Study:

  • To investigate how neurons in firing-rate-based systems encode sequential stimuli for decision-making.
  • To explore the role of synaptic facilitation and attractor networks in sequential decision-making.

Main Methods:

  • Recording from "partial differential" neurons in the ventral premotor cortex during vibrotactile flutter frequency decision-making tasks.
  • Modeling neuronal networks incorporating synaptic facilitation and attractor dynamics.

Main Results:

  • Synaptic facilitation enables neurons to retain the first stimulus during the delay and integrate it with the second stimulus.
  • Partial differential neurons respond to a combination of both sequential stimuli.
  • These neurons provide crucial input to subsequent attractor decision-making networks.

Conclusions:

  • Synaptic facilitation is a key mechanism for representing sequential stimuli in memory and for combined stimulus processing.
  • Neuronal attractor dynamics complement synaptic facilitation in enabling sequential decision-making.
  • These mechanisms provide a framework for understanding sequential information processing in the brain.