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Chronic, multisite, multielectrode recordings in macaque monkeys.

Miguel A L Nicolelis1, Dragan Dimitrov, Jose M Carmena

  • 1Department of Neurobiology, Duke University, Durham, NC 27710, USA. nicoleli@neuro.duke.edu

Proceedings of the National Academy of Sciences of the United States of America
|September 10, 2003
PubMed
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Researchers developed a new method to record single cortical neuron activity in awake monkeys using high-density microwire arrays. This technique enables long-term neural recordings for studying brain function and developing neuroprosthetics.

Area of Science:

  • Neuroscience
  • Primate Neurophysiology

Background:

  • Understanding primate brain function requires advanced neural recording techniques.
  • Existing methods may have limitations in resolution and long-term stability.

Purpose of the Study:

  • To describe a novel paradigm for recording single cortical neuron activity in awake, behaving macaque monkeys.
  • To highlight the capabilities of high-density microwire arrays and multichannel instrumentation for primate neurophysiology.

Main Methods:

  • Implantation of high-density microwire arrays (96-704 microwires) into up to five cortical areas of three adult rhesus monkeys.
  • Multichannel instrumentation for recording neural activity.
  • Recordings conducted 3-4 weeks post-implantation, with some lasting up to 18 months.

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Main Results:

  • Successfully recorded activity from 421 single neurons.
  • Achieved a mean peak-to-peak voltage of 115 +/- 3 microV and a signal-to-noise ratio > 5:1.
  • Recorded up to 247 neurons in a single session and isolated 58 neurons 18 months post-implantation.

Conclusions:

  • The described paradigm offers a robust method for chronic neural recordings in primates.
  • This technique can advance neurophysiological investigations into learning, perception, and sensorimotor integration.
  • The method has potential applications in the development of neuroprosthetic devices.