Body surface potential mapping of the cortico-muscular axis using smart textile electrode arrays

Area of Science:

• Biomedical Engineering
• Neuroscience
• Wearable Technology

Background:

• Cutaneous electrophysiology is vital for assessing organs like the brain and muscles.
• Current methods lack spatial resolution and face clinical adoption challenges.
• Body surface potential mapping offers improved diagnostic capabilities but requires advanced solutions.

Purpose of the Study:

• To develop a hybrid e-textile electrode array system for simultaneous cortico-muscular axis electrophysiological mapping.
• To overcome limitations of existing electrode systems in performance, wearability, and data analysis.
• To enable non-invasive study of brain-body dynamics for practical applications.

Main Methods:

• Developed a hybrid e-textile electrode array with conducting polymer coatings.
• Utilized a flexible fabrication process for enhanced connectivity and wearability.
• Implemented interpretable machine learning algorithms for data analysis.

Main Results:

• Achieved reliable simultaneous muscle and brain recordings in single-subject experiments.
• Successfully classified grasped object shapes and somatosensory stimuli.
• Demonstrated spatial mapping of reaction times and prediction of muscle activity from cortical signals.

Conclusions:

• The e-textile system provides a wearable, multi-modal platform for electrophysiological mapping.
• This technology advances the non-invasive study of cortico-muscular dynamics.
• It represents a significant step towards practical brain-body interfaces for neurorehabilitation, prosthetics, and human-machine interaction.