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Self-Paced Online vs. Cue-Based Offline Brain-Computer Interfaces for Inducing Neural Plasticity.
Mads Jochumsen1, Muhammad Samran Navid2,3, Rasmus Wiberg Nedergaard4,5
1SMI, Department of Health Science and Technology, Aalborg University, Aalborg, 9220, Denmark. mj@hst.aau.dk.
Brain Sciences
|June 5, 2019
Summary
Brain-computer interfaces (BCIs) enhance cortical plasticity for stroke rehabilitation. Both cue-based and self-paced BCIs significantly increased motor-evoked potentials, with self-paced showing a larger immediate effect.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Biomedical Engineering
Background:
- Brain-computer interfaces (BCIs) offer potential for stroke rehabilitation by inducing cortical plasticity.
- BCIs pair brain activity with peripheral stimulation, with cue-based and self-paced modes.
Purpose of the Study:
- To compare the cortical plasticity induced by cue-based versus self-paced BCI modes.
- To assess changes in cortical excitability following BCI interventions.
Main Methods:
- Fifteen healthy participants underwent two BCI sessions: cue-based and self-paced.
- Imagined dorsiflexions from EEG were paired with peroneal nerve stimulation 50 times.
- Cortical excitability measured via motor-evoked potentials (MEPs) before, immediately after, and 30 minutes post-intervention.
Main Results:
- Both BCI modes significantly increased MEP amplitudes post-intervention.
- Self-paced BCI showed a greater increase in absolute MEP size (79%) compared to cue-based (37%) immediately post-intervention.
- A significant difference between modes was observed in relative MEP units immediately post-intervention.
Conclusions:
- BCIs effectively induce immediate changes in cortical excitability, relevant for stroke rehabilitation priming protocols.
- Further validation in stroke patient populations is necessary to confirm clinical applicability.
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