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生物增强设计和低损伤植入式阵列电极的功能评估.

Ling Wang1,2, Chenrui Zhang1,2, Zhiyan Hao1,2,3

  • 1State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, China.

Bioactive materials
|January 28, 2025
PubMed
概括

研究人员开发了用于脑计算机接口 (BCI) 的新型生物阵列电极. 这些电极改善信号记录,减少大脑组织损伤,增强长期BCI稳定性.

关键词:
生物增强设计是生物增强设计.生物相容性 生物相容性可植入的神经电极.伤组织抑制 伤组织抑制信号与噪声的比率.

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科学领域:

  • 生物医学工程 生物医学工程
  • 神经科学是一个神经科学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 可植入的神经电极对于脑计算机接口 (BCI) 至关重要.
  • 机械和生物特性不匹配导致异物反应和质痕,损害了长期信号稳定性.
  • 当前的电极材料在实现稳定,长期的神经信号记录方面面临着挑战.

研究的目的:

  • 设计和生物增强具有异质梯度结构的植入式电极 (生物阵列电极).
  • 为了提高神经电极的生物相容性和长期性能,用于BCI应用.
  • 研究生物增强抑制质痕并增强神经信号记录的机制.

主要方法:

  • 开发了用于电极表面涂层的复合聚氨-凝-酸导电水凝配方.
  • 使用数值模拟和物理化学表征,优化电极设计,材料和性能.
  • 使用C57小鼠模型进行长期的*in vivo*动物实验,以评估生物性能.

主要成果:

  • 与金属阵列电极相比,生物阵列电极表面电荷增加了1.74倍,阻抗在1kHz下降了63.17%,平均电容翻了一番.
  • 长期的动物实验表明,生物阵列电极始终记录了2.5倍多的信号,信号与噪声比高2.1倍.
  • 研究了痕抑制的机制,由于增强的接口生物相容性而减少了脑损伤,并证实了长期的*in vivo*稳定性.

结论:

  • 新型生物阵列电极显著改善了电气性能和生物相容性.
  • 生物增强设计有效地抑制质痕,从而减少大脑损伤和增强长期*in vivo*稳定性.
  • 这些发现突显了生物阵列电极在推进稳定可靠的大脑与计算机接口方面的潜力.