Tactile event-related potentials in amyotrophic lateral sclerosis (ALS): Implications for brain-computer interface
S Silvoni1, L Konicar2, M A Prats-Sedano3
1Dept. of Neurophysiology, I.R.C.C.S. S.Camillo Hospital Foundation, Venice, Italy.
Summary
Amyotrophic lateral sclerosis (ALS) does not alter tactile event-related potentials. These brain responses show potential for monitoring attention and task performance in ALS patients, forming a basis for brain-computer interfaces (BCIs).
Area of Science:
- Neuroscience
- Biomedical Engineering
Background:
- Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease affecting motor neurons.
- Brain-computer interfaces (BCIs) offer potential communication and control solutions for individuals with severe motor impairments.
Purpose of the Study:
- To investigate neurophysiological brain responses to tactile stimuli in ALS patients.
- To assess the feasibility of using tactile event-related potentials (TERPs) for BCI applications in ALS.
Main Methods:
- Electroencephalographic (EEG) signals were recorded from 14 ALS patients and 10 healthy controls during a tactile stimulation paradigm.
- Target and non-target brain responses were analyzed, and classification errors were used for sub-grouping.
Main Results:
- No significant differences in TERPs were found between ALS patients and controls.
- Classification performance did not correlate with the clinical state of ALS patients.
- Mean classification errors were 19.4% in controls and 24.3% in ALS patients.
Conclusions:
- Tactile event-related potentials are not significantly altered in ALS.
- TERPs can serve as a viable BCI basis for monitoring attention and task performance in ALS patients.
- The findings have implications for BCI implementation in critically ill patients, including those in a locked-in state.
