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Updated: Oct 5, 2025
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Recording Large-scale Neuronal Ensembles with Silicon Probes in the Anesthetized Rat
Published on: October 19, 2011
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Large-scale neural recordings with single neuron resolution using Neuropixels probes in human cortex.
Angelique C Paulk1,2, Yoav Kfir3, Arjun R Khanna3
1Center for Neurotechnology and Neurorecovery, Department of Neurology, Massachusetts General Hospital, Boston, MA, USA. apaulk@mgh.harvard.edu.
Nature Neuroscience
|February 1, 2022
Summary
New silicon probes enable recording from over 200 single neurons in human brains during surgery. This breakthrough offers unprecedented spatiotemporal resolution for studying cognitive processes and neurological disorders.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Neurosurgery
Background:
- Current human brain recordings are limited to few neurons or aggregate signals.
- Animal models allow cellular resolution but don't fully capture human cognition.
Purpose of the Study:
- To introduce a novel probe and techniques for high-density single-unit recordings in humans.
- To enable detailed study of human neuronal activity at cellular resolution during surgery.
Main Methods:
- Utilized a new variant of silicon Neuropixels probes during intraoperative neurosurgical procedures.
- Developed techniques for simultaneous recording of over 200 well-isolated cortical single units.
Main Results:
- Characterized diverse extracellular waveforms, identifying eight distinct single-unit classes.
- Observed variations in firing rates, array location, waveform spread, and modulation by local field potential events.
Conclusions:
- High-density silicon arrays offer a viable method for high-resolution human neuronal recordings.
- This technology paves the way for studying human cognition and dysfunction with unprecedented detail.
