Volitional neural control with the CorTec Brain Interchange by an individual with chronic stroke

Abstract

We report the first demonstration of volitional control of a Brain-Computer Interface (BCI) using the CorTec Brain Interchange by an individual with chronic hemiparetic stroke and no prior BCI experience. Subdural electrocorticographic (ECoG) recordings were acquired from sensorimotor cortex to facilitate voluntary control over a velocity-defined Pong paddle. Linear discriminant and autoregressive ridge-regression decoders trained on mu and beta band-power features were trained on data collected during monthly study visits prior to the BCI testing. Across three short Pong sessions (96 min; 400 rallies) the participant attained 0.53–0.61 mean paddle hits per rally, above the static paddle physics baseline (0.28; permutation p ≤ 0.013 for all three sessions) and a stricter pipeline-replay shuffled baseline (~0.36; p ≤ 0.011). Participant self-report demonstrated strategy-level insight into their control of motor-imagery and related game performance.

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Source: Sarma, D., Cho, H., Robert-Gonzalez, A., Stephan, E., Schuettler, M., Buchheit, M., Gkogkidis, C. A., Herron, J., Weaver, K. E., Cramer, S. C., Moritz, C., Ojemann, J. G., Bahadori-Nejad, M.: “Volitional Neural Control with the Cortec Brain Interchange by an Individual with Chronic Stroke”, Proceedings of the 10th Graz Brain-Computer Interface Conference, pp. 588-593, 2026. DOI 10.3217/978-3-99161-093-9-101