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Animal Models of Depression - Chronic Despair Model (CDM)
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Short term depression unmasks the ghost frequency.

Tjeerd V Olde Scheper1, Huibert D Mansvelder, Arjen van Ooyen

  • 1Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands. tvolde-scheper@brookes.ac.uk

Plos One
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Short Term Plasticity (STP) and Short Term Depression (STD) influence neural network dynamics. STD enables accurate temporal summation and solves the ghost frequency problem, impacting brain function.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Short Term Plasticity (STP) is prevalent in brain synapses, modulating synaptic transmission probability.
  • The precise impact of STP on neural network dynamics remains largely uncharacterized.

Purpose of the Study:

  • To investigate the role of Short Term Depression (STD), a form of STP, in neural network dynamics.
  • To demonstrate how STD can enable temporal signal processing and explain perceptual phenomena.

Main Methods:

  • Development of a novel dynamic model for Short Term Plasticity (STP).
  • Application of the model to simulate chopper neurons in the Ventral Cochlear Nucleus and a cortical microcircuit.

Main Results:

  • Short Term Depression (STD) was shown to affect the phase of frequency-coded input, enabling accurate temporal summation in small networks.
  • The model successfully reproduced dynamics in microcircuits and explained the ghost frequency phenomenon.
  • STP was demonstrated to reliably reproduce dynamics in chopper neurons and cortical microcircuits.

Conclusions:

  • Short Term Depression (STD) plays a crucial role in temporal signal processing and auditory perception.
  • STP dynamics are vital for understanding self-regulation of cortical activity and afferent input in neuronal microcircuits.
  • The novel STP model provides significant insights into the functional roles of synaptic plasticity in the brain.