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Related Concept Videos

Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Related Experiment Video

Updated: May 21, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
07:33

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

A computational study on altered theta-gamma coupling during learning and phase coding.

Xuejuan Zhang1, Keith M Kendrick, Haifu Zhou

  • 1Mathematical Department, Zhejiang Normal University, Jinhua, P.R. China.

Plos One
|June 28, 2012
PubMed
Summary
This summary is machine-generated.

This study used a neural network model to investigate brain oscillations. The model successfully reproduced learning changes and explored memory capacity by linking theta and gamma rhythms.

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Related Experiment Videos

Last Updated: May 21, 2026

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
07:33

Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice

Published on: June 29, 2018

Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit
11:37

Tuning in the Hippocampal Theta Band In Vitro: Methodologies for Recording from the Isolated Rodent Septohippocampal Circuit

Published on: August 2, 2017

Combined Invasive Subcortical and Non-invasive Surface Neurophysiological Recordings for the Assessment of Cognitive and Emotional Functions in Humans
08:25

Combined Invasive Subcortical and Non-invasive Surface Neurophysiological Recordings for the Assessment of Cognitive and Emotional Functions in Humans

Published on: May 19, 2016

Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • Theta and gamma oscillations are crucial for cognitive functions like learning and memory.
  • The precise mechanisms of coupling between theta and gamma rhythms and their role in memory are not fully understood.

Purpose of the Study:

  • To investigate the role of theta-gamma coupling in learning and memory using a neural network model.
  • To explore how this coupling relates to memory span and neural phase coding.

Main Methods:

  • Developed a spiking neural network model incorporating GABA(A) receptor currents to generate theta and gamma rhythms.
  • Manipulated NMDA and GABA(A,slow) receptors to simulate learning-related changes in theta-gamma coupling.
  • Analyzed the model's output to assess working memory capacity and phase coding effects.

Main Results:

  • The model reproduced learning-related changes in theta-gamma coupling strength, with or without changes in theta amplitude.
  • Short-term memory storage capacity, modeled as nested gamma-subcycles, correlated with maximal theta power.
  • Increased theta power was associated with enhanced precision of theta phase, suggesting a role in neural timing.

Conclusions:

  • Neural network models can effectively simulate and investigate the complex interplay of brain oscillations in learning and memory.
  • Theta-gamma coupling dynamics are critical for working memory capacity and the precise timing of neuronal firing.
  • Further research into these oscillatory dynamics could reveal new insights into cognitive processes.