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Related Experiment Videos

Mechanical trauma induces immediate changes in neuronal network activity.

Gustavo R Prado1, James D Ross, Stephen P DeWeerth

  • 1Laboratory for Neuroengineering, Georgia Tech/Emory Coulter Department of Biomedical Engineering, Georgia Institute of Technology, 313 Ferst Drive, Atlanta, GA 30332-0535, USA.

Journal of Neural Engineering
|December 1, 2005
PubMed
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Traumatic brain injury (TBI) can disrupt neuronal plasma membranes, altering cell function. This study models TBI to reveal how membrane permeability changes impact neuronal network electrophysiology immediately after injury.

Area of Science:

  • Neuroscience
  • Biophysics
  • Cellular Biology

Background:

  • Traumatic brain injury (TBI) involves mechanical stress that can cause neuronal dysfunction or death.
  • The immediate cellular and electrophysiological consequences of mechanical trauma on neurons are not well understood.
  • Plasma membrane disruption is a potential early cellular event following mechanical brain injury.

Purpose of the Study:

  • To investigate the acute electrophysiological responses of neuronal networks to mechanical trauma.
  • To elucidate the role of neuronal plasma membrane permeability increases in the functional consequences of TBI.
  • To establish an in vitro model for studying the effects of high-rate mechanical stress on neuronal cells.

Main Methods:

  • Development of a novel device for applying high-rate mechanical stress to cultured neurons.

Related Experiment Videos

  • Utilizing a microelectrode array to monitor neuronal electrophysiological activity.
  • Assessing changes in firing frequency, burst intervals, and spikes within bursts before and after mechanical insult.

    • Main Results:

    • Mechanical insult induced a transient increase in neuronal plasma membrane permeability lasting approximately 10 minutes.
    • Acute electrophysiological activity of injured neuronal cultures was monitored for 10 minutes post-insult.
    • Observed heterogeneous electrophysiological responses, with common increases in burst intervals and parameter variability.

    Conclusions:

    • Neuronal plasma membrane permeability increases are a key early event following mechanical trauma.
    • These permeability changes significantly impact the electrophysiological behavior of neuronal networks.
    • The study provides insights into the functional consequences of plasma membrane disruptions in TBI.