Prototype of a Multimodal and Multichannel Electro-Physiological and General-Purpose Signal Capture System: Evaluation in Sleep-Research-like Scenario

Pablo Cevallos-Larrea ¹, Leimer Guambaña-Calle ¹, Danilo Andrés Molina-Vidal ²

⁰Biomedical Engineering Research Group-GIIB, Universidad Politécnica Salesiana, Cuenca 010102, Ecuador.

Sensors (basel, Switzerland) +

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May 14, 2025

View abstract on PubMed

Summary

Researchers developed the Multimodal-Multichannel Acquisition Module (MADQ) for simultaneous electrophysiological data collection. This system simplifies multimodal setups, enabling comprehensive physiological signal analysis.

Area Of Science

Biomedical Engineering
Neuroscience
Physiology

Background

Simultaneous analysis of brain, muscle, and cardiac electrophysiological signals is crucial for research and clinical applications.
Existing setups for multimodal electrophysiological data acquisition are often complex, requiring diverse, specialized tools.

Purpose Of The Study

To introduce a prototype system, the Multimodal-Multichannel Acquisition Module (MADQ), for simultaneous multimodal and multichannel electrophysiological signal acquisition.
To address the need for a simplified and comprehensive experimental setup for multimodal electrophysiological studies.

Main Methods

The MADQ system features three capturing blocks with separate reference circuits.
It supports up to 40 electrophysiological channels, plus 4 analog and 4 digital input channels, with sampling frequencies up to 16 kHz.
Key functionalities include configurable bipolar recording, lead-off detection, and real-time online filtering.

Main Results

System performance was evaluated using Input-Referred Noise (IRN), Noise-Free Bits (NFB), and Effective Number of Bits (ENOB) across different gain and sampling frequencies.
Preliminary experiments, including auditory evoked potential detection in a simulated sleep study, validated the system's capabilities.

Conclusions

The MADQ prototype offers a flexible and integrated solution for simultaneous multimodal electrophysiological data acquisition.
The system demonstrates potential for simplifying complex experimental setups and enhancing multimodal research, such as in sleep studies.

Keywords:

ADS1299 multichannel biomedical signal acquisition system multimodal physiological signals