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Active microelectronic neurosensor arrays for implantable brain communication interfaces.

Authors
  • Song, Y-K
  • Borton, D A
  • Park, S
  • Patterson, W R
  • Bull, C W
  • Laiwalla, F
  • Mislow, J
  • Simeral, J D
  • Donoghue, J P
  • Nurmikko, A V
Type
Published Article
Journal
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
Publication Date
Aug 01, 2009
Volume
17
Issue
4
Pages
339–345
Identifiers
DOI: 10.1109/TNSRE.2009.2024310
PMID: 19502132
Source
Medline
License
Unknown

Abstract

We have built a wireless implantable microelectronic device for transmitting cortical signals transcutaneously. The device is aimed at interfacing a cortical microelectrode array to an external computer for neural control applications. Our implantable microsystem enables 16-channel broadband neural recording in a nonhuman primate brain by converting these signals to a digital stream of infrared light pulses for transmission through the skin. The implantable unit employs a flexible polymer substrate onto which we have integrated ultra-low power amplification with analog multiplexing, an analog-to-digital converter, a low power digital controller chip, and infrared telemetry. The scalable 16-channel microsystem can employ any of several modalities of power supply, including radio frequency by induction, or infrared light via photovoltaic conversion. As of the time of this report, the implant has been tested as a subchronic unit in nonhuman primates ( approximately 1 month), yielding robust spike and broadband neural data on all available channels.

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