Emerging Materials and Technologies with Applications in Flexible Neural Implants: A Comprehensive Review of Current Issues with Neural Devices

Younguk Cho, Sanghoon Park, Juyoung Lee, Ki Jun Yu

Research output: Contribution to journalReview articlepeer-review

Abstract

Neuroscience is an essential field of investigation that reveals the identity of human beings, with a comprehensive understanding of advanced mental activities, through the study of neurobiological structures and functions. Fully understanding the neurotransmission system that allows for connectivity among neuronal circuits has paved the way for the development of treatments for neurodegenerative diseases such as Parkinson's disease, Alzheimer's disease, and depression. The field of flexible implants has attracted increasing interest mainly to overcome the mechanical mismatch between rigid electrode materials and soft neural tissues, enabling precise measurements of neural signals from conformal contact. Here, the current issues of flexible neural implants (chronic device failure, non-bioresorbable electronics, low-density electrode arrays, among others are summarized) by presenting material candidates and designs to address each challenge. Furthermore, the latest investigations associated with the aforementioned issues are also introduced, including suggestions for ideal neural implants. In terms of the future direction of these advances, designing flexible devices would provide new opportunities for the study of brain–machine interfaces or brain–computer interfaces as part of locomotion through brain signals, and for the treatment of neurodegenerative diseases.

Original languageEnglish
JournalAdvanced Materials
DOIs
Publication statusAccepted/In press - 2021

Bibliographical note

Funding Information:
Y.C., S.P., and J.L. contributed equally to this work. This work acknowledges the support received from the National Research Foundation of Korea (Grant Nos. NRF‐2018M3A7B4071109 and NRF‐2019R1A2C2086085).

Publisher Copyright:
© 2021 The Authors. Advanced Materials published by Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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