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A fully implantable rodent neural stimulator.

D W J Perry1, D B Grayden, R K Shepherd

  • 1Bionics Institute, Victoria, Australia.

Journal of Neural Engineering
|January 18, 2012
PubMed
Summary

Researchers developed a fully implantable neural stimulator for precise electrical stimulation in rats. This device, tested in vivo, successfully elicited neural and behavioral responses, functioning for up to five months.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Implantable Devices

Background:

  • Electrical stimulation of neural and excitable tissues is crucial for neural prostheses development and neurological research.
  • Existing methods may lack the necessary precision, programmability, or long-term stability for chronic in vivo studies.

Purpose of the Study:

  • To develop and validate a fully implantable, two-channel neural stimulator for intra-cochlear electrical stimulation in rats.
  • To assess the device's functionality, longevity, and potential for broader applications in neuroscience and telemetry.

Main Methods:

  • Development of a fully implantable stimulator with an on-board microcontroller, radio link, and programmable current sources.
  • Utilizing an omni-directional inductive link for wireless power delivery.
  • In vivo testing in rats to evaluate neural and behavioral responses to intra-cochlear stimulation.

Main Results:

  • The implant successfully delivered charge-balanced biphasic stimulation.
  • In vivo testing elicited measurable neural and behavioral responses.
  • The device maintained functionality for up to five months in the animal model.

Conclusions:

  • The developed neural stimulator is effective for intra-cochlear electrical stimulation in rats.
  • The device's design is adaptable for stimulating other neural tissues and holds potential for chronic physiological monitoring applications.

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