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Updated: Jun 26, 2026
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A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats
Published on: November 7, 2017
A simple integrated system for electrophysiologic recordings in animals.
Mary A Johnson1, Bernard J Slater, Neil R Miller
1The Department of Ophthalmology and Visual Sciences, The University of Maryland School of Medicine, Baltimore, MD, 21201, USA. mjohnson@umaryland.edu
Documenta Ophthalmologica. Advances in Ophthalmology
|January 13, 2009
Summary
Researchers modified a fundus camera for simultaneous pattern electroretinograms (pERGs) and pattern visual evoked potentials (pVEPs) recording. This innovation enhances animal studies by enabling precise retinal stimulation and data acquisition.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Neuroscience
Background:
- Fundus cameras are essential for retinal imaging.
- Simultaneous electrophysiological recordings offer comprehensive visual function assessment.
- Current methods may lack precision in retinal stimulation for animal models.
Purpose of the Study:
- To describe a novel modification of a fundus camera.
- To enable simultaneous recording of pattern electroretinograms (pERGs) and pattern visual evoked potentials (pVEPs).
- To improve precision in retinal stimulation for animal studies.
Main Methods:
- Integrated an organic light-emitting diode (OLED) into the fundus camera's split-viewer pathway.
- Positioned the OLED conjugate to the subject's pupil for precise retinal targeting.
- Utilized the OLED's high luminance and contrast capabilities.
Main Results:
- Achieved simultaneous pERG and pVEP recording using the modified fundus camera.
- Demonstrated precise delivery of visual stimuli to a known retinal location.
- The OLED provided high-quality stimulation with minimal degradation.
Conclusions:
- The modified fundus camera system facilitates simultaneous pERG and pVEP recordings.
- This technique is particularly valuable for animal research requiring accurate retinal positioning.
- The system offers a robust method for visual function assessment in preclinical studies.
