Related Experiment Video
Updated: May 2, 2026
Brain-Computer Interface-controlled Upper Limb Robotic System for Enhancing Daily Activities in Stroke Patients
Published on: April 18, 2025
Brain-computer interface (BCI) evaluation in people with amyotrophic lateral sclerosis
Lynn M McCane1, Eric W Sellers, Dennis J McFarland
1Laboratory of Neural Injury and Repair, Wadsworth Center, New York State Department of Health , Albany , New York , and Helen Hayes Rehabilitation Hospital, New York State Department of Health , West Haverstraw, New York , USA.
Most individuals with amyotrophic lateral sclerosis (ALS) can use a visual brain-computer interface (BCI) for communication. Visual impairments, not disability severity, were the main barrier for non-users, suggesting auditory BCIs as an alternative.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Rehabilitation Medicine
Background:
- Brain-computer interfaces (BCIs) offer potential communication restoration for individuals with severe motor disabilities, such as amyotrophic lateral sclerosis (ALS).
- Evaluating the feasibility and identifying factors influencing BCI use in the ALS population is crucial for clinical application.
Purpose of the Study:
- To establish a protocol for assessing BCI usability in individuals with ALS.
- To quantify the proportion of ALS patients capable of using a visual P300-based BCI.
- To identify factors impacting BCI performance in this cohort.
Main Methods:
- A standardized protocol was developed to evaluate 25 individuals with ALS using a visual P300-based BCI with an 8-channel EEG.
- Stepwise linear discrimination was employed to select optimal BCI parameters.
- BCI accuracy was assessed, and correlations with disability level and visual function were analyzed.
Main Results:
- Two groups emerged: 17 participants (G70) achieved adequate communication accuracy (mean 92%), while 8 (L40) did not (mean 12%).
- BCI performance did not correlate with ALS severity; 65% of G70 participants had severe motor disability.
- All L40 participants exhibited visual impairments, and P300 signals differed between groups (larger and more anterior in G70).
Conclusions:
- The majority of individuals with ALS can effectively utilize a visual P300 BCI for communication.
- Visual impairment is a significant limiting factor for BCI use in some ALS patients.
- Auditory P300-based BCIs present a viable alternative for ALS individuals with visual impairments.
