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Toward a self-deploying shape memory polymer neuronal electrode.

Andrew A Sharp1, Hrishikesh V Panchawagh, Alicia Ortega

  • 1Rocky Mountain Taste and Smell Center, Neuroscience Program and Department of Cell and Developmental Biology, University of Colorado at Denver and Health Sciences Center, Aurora, CO 80045, USA. andrew.sharp@uchsc.edu

Journal of Neural Engineering
|November 25, 2006
PubMed
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Researchers developed novel shape memory polymer probes for brain implants. These flexible electrodes self-deploy slowly, reducing tissue damage and improving long-term biocompatibility for neural recording and stimulation.

Area of Science:

  • Biomaterials Engineering
  • Neuroscience
  • Medical Devices

Background:

  • Chronic neuronal probes face challenges with long-term biocompatibility and tissue damage.
  • Stiff probes cause astrocytic scarring, creating insulating sheaths that impede neural recording and stimulation.

Purpose of the Study:

  • To explore the feasibility of using softer, polymer-based probes for chronic neural recording and stimulation.
  • To develop a micromachined shape memory polymer (SMP) probe for self-deploying electrodes at slow rates.

Main Methods:

  • Investigated the implantation of softer polymer-based probes into the mouse olfactory bulb.
  • Developed and tested micromachined SMP probes capable of controlled, slow self-deployment into brain tissue.

Main Results:

Related Experiment Videos

  • Demonstrated that softer polymer probes reduce astrocytic scarring compared to stiff probes.
  • Showcased SMP probes that can self-implant at controlled slow rates, penetrating brain tissue effectively.

Conclusions:

  • Fabrication of SMP-based electrodes for slow, self-implanting compliant conductors in the brain is feasible.
  • This approach can decrease initial implantation trauma and enhance long-term biocompatibility for neural measurement and stimulation.