Namima T, Kempkes E, Smith B, Smith L, Orsborn AL, Pasupathy A. Inserting a Neuropixels probe into awake monkey cortex: two probes, two methods.
J Neurosci Methods 2024;
402:110016. [PMID:
37995854 PMCID:
PMC10843751 DOI:
10.1016/j.jneumeth.2023.110016]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/17/2023] [Accepted: 11/18/2023] [Indexed: 11/25/2023]
Abstract
BACKGROUND
Neuropixels probes have revolutionized neurophysiological studies in the rodent, but inserting these probes through the much thicker primate dura remains a challenge.
NEW METHODS
Here we describe two methods we have developed for the insertion of two types of Neuropixels probes acutely into the awake macaque monkey cortex. For the fine rodent probe (Neuropixels 1.0, IMEC), which is unable to pierce native primate dura, we developed a dural-eyelet method to insert the probe repeatedly without breakage. For the thicker short NHP probe (Neuropixels NP1010), we developed an artificial dura system to insert the probe.
RESULTS AND COMPARISON WITH EXISTING METHODS
We have now conducted successful experiments in 3 animals across 7 recording chambers with the procedures described here and have achieved recordings with similar yields over several months in each case.
CONCLUSION
We hope that our hardware, surgical preparation, methods for insertion and methods for removal of broken probe parts are of value to primate physiologists everywhere.
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