Toward a fully integrated wireless wearable EEG-NIRS bimodal acquisition system
J Safaie1, R Grebe, H Abrishami Moghaddam
1GRAMFC - Inserm U1105, UFR of Medicine of University of Picardie Jules Verne, F-80036 Amiens, France.
Journal of Neural Engineering
|July 30, 2013
Summary
A new wireless wearable system integrates electroencephalography (EEG) and near-infrared spectroscopy (NIRS) to monitor brain electrical activity and blood flow simultaneously. This miniaturized device offers enhanced portability for distributed patient monitoring and clinical research.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Medical Devices
Background:
- Neuronal electrical activity and microcirculation dynamics are crucial for brain function and disease but are poorly understood.
- Existing diagnostic tools lack the integration to study these coupled physiological processes effectively.
Purpose of the Study:
- To develop an advanced, wearable diagnostic tool for investigating the relationship between brain electrical activity and microcirculation.
- To create a system capable of real-time, simultaneous monitoring of electroencephalography (EEG) and near-infrared spectroscopy (NIRS) signals.
Main Methods:
- Development of a wireless wearable system integrating EEG and NIRS.
- Utilizing light emitting diodes (LEDs) and silicon photodiodes for NIRS measurements.
- Incorporating a 3D accelerometer for motion artifact detection.
Main Results:
- Miniaturized, integrated device for real-time monitoring of electrical and hemodynamic brain activity.
- Wireless communication enables synchronous monitoring of up to seven devices for body-area networks.
- Enhanced portability, adjustable LED output, and motion artifact detection improve usability and data quality.
Conclusions:
- The developed EEG-NIRS system was validated using a tissue-mimicking phantom.
- Clinical applicability was demonstrated through somatotopic electrical evoked potential experiments.
