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Related Experiment Video

Updated: Jul 12, 2026

Recording Large-scale Neuronal Ensembles with Silicon Probes in the Anesthetized Rat

Recording Large-scale Neuronal Ensembles with Silicon Probes in the Anesthetized Rat

Published on: October 19, 2011

A micromachined silicon multielectrode for multiunit recording.

A J Spence¹, R R Hoy, M S Isaacson

¹School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853, USA. ajs54@cornell.edu

Journal of Neuroscience Methods

|June 20, 2003

Summary

This summary is machine-generated.

This study introduces a novel 16-channel multielectrode for recording neural activity in cricket nerve cords. The microfabricated device, using deep reactive ion etching, enables precise neural recordings and analysis of action potentials.

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Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice

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Area of Science:

Neuroscience
Bioengineering
Materials Science

Background:

Recording propagating action potentials from multiple neurons is crucial for understanding neural circuits.
Existing extracellular electrode arrays face limitations in spike resolution and anatomical correlation.
Microfabrication techniques offer potential for improved neural recording devices.

Purpose of the Study:

To develop and evaluate a novel 16-channel multielectrode for recording from the cricket ventral nerve cord.
To assess the fabrication process using deep reactive ion etching (DRIE) for creating rigid, high-density electrode structures.
To analyze neural activity, including action potential conduction velocities, using the developed multielectrode.

Main Methods:

Fabrication of a 16-channel multielectrode using photolithography and deep reactive ion etching (DRIE).
Recording of propagating action potentials from the ventral nerve cord of Gryllus bimaculatus.
Utilizing principle component analysis and clustering to generate spike templates for eight neurons.
Analysis of stimulus-evoked activity and calculation of conduction velocities.

Main Results:

Successfully recorded propagating action potentials from multiple units in the cricket ventral nerve cord.
Generated clean spike templates for eight neurons from a 40-second recording.
Determined neural conduction velocities ranging from 2.59+/-0.05 to 4.99+/-0.12 m/s.
Demonstrated the capability of the microfabricated device for stable positioning and isolation of recording sites.

Conclusions:

The novel microfabricated multielectrode, utilizing DRIE, enables high-density, precise neural recordings.
This technology addresses limitations of current extracellular arrays, improving spike resolution and anatomical correlation.
The rigid, stable electrode design is suitable for various nerve cord applications, including clamping and squeezing.