Improvements for recording retinal function with Microelectrode Arrays

Area of Science:

• Neuroscience
• Electrophysiology
• Retinal Physiology

Background:

• Microelectrode arrays (MEAs) enable simultaneous extracellular recording and stimulation of multiple neural sites.
• MEA recordings are crucial for understanding complex electrical activity patterns in the retinal network.
• Investigating retinal function requires precise methods for capturing neural signaling.

Purpose of the Study:

• To provide a comprehensive, stepwise protocol for using MEAs to record action potentials from the mouse retina.
• To offer detailed techniques, including a custom optical system, troubleshooting, and data processing methods for MEA experiments.
• To demystify common MEA experimental failures and guide researchers in effective retinal functionality investigations.

Main Methods:

• Utilizing microelectrode arrays (MEAs) for extracellular recording of action potentials in the mouse retina.
• Applying both electrical and light stimuli to elicit and record retinal network responses.
• Implementing spike detection and sorting algorithms for precise action potential extraction and validation.

Main Results:

• Successful recording of action potentials from the mouse retina using MEAs in response to stimuli.
• Detailed description of a custom optical system designed for MEA experiments.
• Provided troubleshooting guidelines addressing common failure modes in retinal MEA recordings.

Conclusions:

• This paper serves as a practical guide for researchers aiming to effectively utilize MEAs for studying retinal functionality.
• The presented methods and troubleshooting tips enhance the reliability and success rate of MEA experiments.
• Accurate spike sorting and analysis of light and electrical responses are facilitated by the provided code resources.