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Updated: Sep 14, 2025
06:40
Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive
Published on: September 27, 2013
14.9K
Stiffness-Tunable Neurotentacles for Minimally Invasive Implantation and Long-Term Neural Activity Recordings.
Yang Wang1,2, Xing Xu3,4, Xiaowei Yang1
1Laboratory of Solid State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 21, 2025
Summary
A novel flexible microelectrode probe, Neurotentacle, stiffens with internal pressure for deep brain implantation. This innovation enables minimally invasive neural recordings with reduced tissue damage and improved long-term stability.
Area of Science:
- Neuroscience
- Materials Science
- Biomedical Engineering
Background:
- Flexible microelectrodes are crucial for chronic neural recordings but face insertion challenges due to low bending strength.
- Deep brain implantation of neural probes requires methods that minimize tissue damage and ensure stability.
Purpose of the Study:
- To introduce a stiffness-tunable polyimide probe, Neurotentacle, for improved deep brain implantation.
- To demonstrate a novel method for enhancing probe stiffness during insertion and flexibility post-insertion.
Main Methods:
- Development of a polyimide probe with embedded microchannels for controllable liquid pressure.
- Utilizing internal liquid pressure to modulate probe stiffness for insertion into brain tissue.
- Fabrication of ultra-thin microchannels maintaining probe dimensions similar to conventional flexible probes.
Main Results:
- Neurotentacle probes achieve stiffness for penetration under elevated pressure and regain flexibility upon pressure reduction.
- Histological evaluations in acute and chronic animal models confirm long-term biocompatibility and stability.
- Neurotentacles demonstrate superior performance in long-term recordings compared to traditional shuttle-assisted methods.
Conclusions:
- The stiffness-tunable Neurotentacle probe offers a straightforward, controllable, and minimally invasive solution for deep brain implantation.
- This technology minimizes tissue damage during insertion and ensures stable, long-term neural recordings.
- The Neurotentacle represents a significant advancement for chronic neural recording applications.
