Construction of Local Field Potential Microelectrodes for <em>in vivo</em> Recordings from Multiple Brain Structures Simultaneously

Anastasia Brodovskaya; Shinnosuke Shiono; Tamal Batabyal; John Williamson; Jaideep Kapur

doi:10.3791/63633

Construction of Local Field Potential Microelectrodes for in vivo Recordings from Multip...

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JoVE Journal Neuroscience

Construction of Local Field Potential Microelectrodes for in vivo Recordings from Multiple Brain Structures Simultaneously

Construction of Local Field Potential Microelectrodes for in vivo Recordings from Multiple Brain Structures Simultaneously

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06:07 min

March 14, 2022

DOI: 10.3791/63633-v

Anastasia Brodovskaya*¹, Shinnosuke Shiono*¹, Tamal Batabyal¹, John Williamson¹, Jaideep Kapur^1,2

¹Department of Neurology,University of Virginia, ²UVA Brain Institute,University of Virginia

Overview

This study presents a protocol for constructing custom microelectrode arrays capable of recording local field potentials (LFPs) in vivo from multiple brain structures simultaneously. The methodology enhances flexibility compared to commercially available microelectrodes, allowing for simultaneous recordings at various depths.

Key Study Components

Area of Science

Electrophysiology
Neuroscience
Neurophysiology

Background

Recording LFPs from various brain structures is crucial in neuroscience research.
Existing microelectrodes may limit multi-structure recording capabilities.
The design aims to overcome these limitations through customizable construction.
This research focuses on enhanced electrode design for effective data collection.

Purpose of Study

To develop a versatile microelectrode system for in vivo recordings.
To enable simultaneous recordings from multiple brain regions.
To provide a adaptable setup for electrophysiological studies.

Methods Used

The method involves constructing microelectrodes from nickel chromium wires with specified dimensions.
Target arrangements are tailored based on stereotactic coordinates.
Detailed instructions include wire handling, gluing techniques, and soldering to headsets.
Electrodes are designed for various brain depths to enhance recording capabilities.
Electrodes are anchored using cranioplasty cement and epoxy resin for stability.

Main Results

The constructed microelectrodes effectively recorded LFPs across multiple brain regions.
The study demonstrated precise voltage deflection measurement indicating seizure onset.
Results show the potential for comparative analysis of seizure latencies across structures.
Confirmed electrode location through a marked current pulse enhances accuracy.

Conclusions

This research establishes a method for creating customizable microelectrode arrays for in vivo studies.
The flexible construction allows for targeted recordings from various brain regions, enhancing data richness.
Findings contribute to better understanding neuronal activities related to seizures and other neurophysiological phenomena.

Frequently Asked Questions

What are the advantages of using this microelectrode design?

This design offers flexibility and adaptability for recording from multiple brain structures simultaneously, unlike standard commercial microelectrodes.

How is the main biological model implemented?

The electrodes are customized for specific brain structures based on their stereotactic coordinates, enabling precise recordings.

What types of data or outcomes are obtained?

This method provides recordings of local field potentials, allowing for analysis of neuronal activity and seizure dynamics.

How can this method be applied or adapted?

Researchers can modify the electrode design based on their specific experimental needs and targeted brain regions.

What are the key considerations when constructing the electrodes?

Accurate measurements of gaps and proper handling of materials are critical to ensure reliable electrode performance and stability.

What limitations should researchers be aware of?

Potential challenges include ensuring precise alignment during construction and possible variability in recording quality based on electrode positioning.

The present protocol describes the construction of custom-made microelectrode arrays to record local field potentials in vivo from multiple brain structures simultaneously.

Researchers often need to record local field potentials from multiple structures at the same time. Our easy microelectrode design allows us to record LFPs from several brain structures at different depths simultaneously. Commercially available microelectrodes often lack flexibility and do not allow to record from multiple brain structures.

Our microelectrode design allows to easily modify the construction to fit any desired structure. Start by taking a dianal-coated nickel chromium wire 50 micrometers in diameter. Tape one end of the wire to the back of the platform and wrap the wire three times around the nearest knob on the platform.

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