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Related Experiment Video

Updated: Dec 12, 2025

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Flexible Fiber Probe for Efficient Neural Stimulation and Detection.

Minghui Du1,2, Lu Huang3,4, Jiajun Zheng3

  • 1State Key Laboratory of Luminescent Materials and Devices School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 11, 2020
PubMed
Summary

Researchers developed novel flexible neural probes for simultaneous optical stimulation and neural recording. These advanced probes offer improved mechanical properties and signal quality for long-term brain-computer interfaces.

Keywords:
brain–machine interfacesflexible fiber probesneural recordingneural stimulationoptogenetics

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Area of Science:

  • Neuroscience
  • Materials Science
  • Biomedical Engineering

Background:

  • Functional neural probes are crucial for understanding and controlling nervous system activity.
  • Existing flexible neural probes face challenges in achieving long-term simultaneous stimulation and recording capabilities.

Purpose of the Study:

  • To develop a flexible, biocompatible neural probe for long-term simultaneous optical stimulation and neural recording.
  • To enhance mechanical properties, optical transmission, and reduce electrical impedance for improved neural interfacing.

Main Methods:

  • Fabrication of flexible multimaterial fiber probes using thermal drawing.
  • Embedding metal electrodes within a biocompatible polymer fiber containing a double-clad optical waveguide.
  • Testing probe performance in behaving mice for long-term neural recording and stimulation.

Main Results:

  • Probes exhibit enhanced mechanical properties and high optical transmission (>90%).
  • Significantly reduced probe impedance (by up to one order of magnitude).
  • Achieved long-term (≥10 weeks) simultaneous optical stimulation and single-cell neural recording in mice with high signal-to-noise ratio (SNR = 30 dB).

Conclusions:

  • The developed flexible multimaterial fiber probes enable robust, long-term simultaneous optical stimulation and neural recording.
  • These probes offer superior performance compared to existing technologies, paving the way for advanced neural interfaces.
  • The findings represent a significant advancement in the development of functional neural probes for neuroscience research and clinical applications.