{"slug":"brain-computer-interfaces","topic":"brain-computer-interfaces","title":"Brain-Computer Interfaces: State of the Field (October 2026)","summary":"Covers intracortical and cortical-surface speech neuroprostheses, electrode-density and stability work, noninvasive EEG and fNIRS interfaces, stroke-rehabilitation trials, and the open debates on decoder design and imagined-speech validity as of October 2026. The most important takeaway: intracortical speech decoding has reached 62 words per minute with a 9.1% word error rate on a 50-word vocabulary, but error rises sharply with vocabulary size and calibration burden and regulatory status remain unsettled.","version":1,"published_at":"2026-10-30","updated_at":"2026-10-30","stats":{"words":3721,"citations":44,"claims":29,"timeline":17,"benchmarks":5,"open_problems":6,"key_papers":15,"glossary":17},"verification":{"status":"verified","method":"automated figure and citation-relevance triage against cited abstracts, plus targeted AI review with web checks of flagged statements; automated citation resolution","claims_checked":7,"issues_fixed":5,"verified_at":"2026-10-30"},"ai_assisted":true,"price":{"usd":"0.20","protocol":"x402","network":"eip155:84532","asset":"USDC"},"url":"https://space-kitty.com/dossiers/brain-computer-interfaces","preview_url":"https://space-kitty.com/api/v1/dossiers/brain-computer-interfaces/preview","purchase_url":"https://space-kitty.com/api/v1/dossiers/brain-computer-interfaces","toc":[{"level":2,"text":"Executive summary","anchor":"executive-summary"},{"level":2,"text":"Background and core concepts","anchor":"background-and-core-concepts"},{"level":2,"text":"Timeline of key milestones","anchor":"timeline-of-key-milestones"},{"level":2,"text":"State of the art","anchor":"state-of-the-art"},{"level":3,"text":"Intracortical speech neuroprostheses","anchor":"intracortical-speech-neuroprostheses"},{"level":3,"text":"Cortical-surface (ECoG) systems","anchor":"cortical-surface-ecog-systems"},{"level":3,"text":"Intracortical communication and control","anchor":"intracortical-communication-and-control"},{"level":3,"text":"Calibration, stability and transfer","anchor":"calibration-stability-and-transfer"},{"level":3,"text":"Noninvasive BCIs and imagined speech","anchor":"noninvasive-bcis-and-imagined-speech"},{"level":3,"text":"Rehabilitation trials","anchor":"rehabilitation-trials"},{"level":3,"text":"Electrode materials, safety and robustness","anchor":"electrode-materials-safety-and-robustness"},{"level":3,"text":"Quantitative benchmarks","anchor":"quantitative-benchmarks"},{"level":2,"text":"Open problems and active debates","anchor":"open-problems-and-active-debates"},{"level":2,"text":"Major programs and players","anchor":"major-programs-and-players"},{"level":2,"text":"Outlook: what to watch","anchor":"outlook-what-to-watch"},{"level":2,"text":"Key papers","anchor":"key-papers"},{"level":2,"text":"Glossary","anchor":"glossary"}],"sample_claims":["Willett et al. (2023) reported attempted speech decoded into text at 62 words per minute with an intracortical speech neuroprosthesis.","The same 2023 system had a 9.1% word error rate on a 50-word vocabulary."],"includes":["markdown","claims","timeline","benchmarks","open_problems","key_papers","glossary","bibliography"],"citation_count":44,"how_to_buy":"GET https://space-kitty.com/api/v1/dossiers/brain-computer-interfaces with an x402 client ($0.20, USDC on Base Sepolia (testnet))."}