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Soft and stretchable electronics offer improved biocompatibility for implantable devices. This review explores advancements in interfacing the nervous system for long-term functional medical implants and future healthcare technologies.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Neuroscience

Background:

  • Implantable electronics are crucial for treating electrical signaling dysfunctions but face challenges due to mechanical and chemical incompatibilities with soft, wet biological tissues.
  • The mismatch between rigid, planar electronics and dynamic biological environments causes adverse physiological responses, limiting long-term functionality.
  • Soft and stretchable materials reduce mechanical mismatch, minimizing tissue damage and foreign body response, enabling novel applications.

Purpose of the Study:

  • To review recent progress in developing long-term functional implantable electronic devices for interfacing with the central (CNS) and peripheral nervous system (PNS).
  • To highlight the importance of minimizing mechanical and physical mismatch for CNS implants and appropriate surface chemistry for PNS implants.
  • To discuss the latest materials and techniques enhancing electronic performance while reducing foreign body reactions for future healthcare technologies.

Main Methods:

  • Review of recent scientific literature on soft and stretchable electronic implants.
  • Analysis of material properties and device designs for biocompatibility and long-term stability.
  • Discussion of interfacing strategies for both central and peripheral nervous systems.

Main Results:

  • Soft and stretchable materials significantly reduce the foreign body response and improve the longevity of electronic implants.
  • Minimizing mechanical mismatch is critical for CNS interfacing, while surface chemistry is paramount for PNS implants.
  • Emerging materials and techniques offer enhanced electronic capabilities and reduced adverse tissue reactions.

Conclusions:

  • Advancements in soft and stretchable electronics are paving the way for more effective and stable long-term implantable devices.
  • Optimizing material properties and interface design is key to overcoming current limitations in neural interfacing.
  • This field holds significant promise for future healthcare technologies addressing neurological and other disorders.