Virtual typing by people with tetraplegia using a self-calibrating intracortical brain-computer interface

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Science Translational Medicine  11 Nov 2015:
Vol. 7, Issue 313, pp. 313ra179
DOI: 10.1126/scitranslmed.aac7328

Prolonged typing with refined BCI

The fact that the brain can be hooked up to a computer to allow paralyzed individuals to type is already a technological feat. But, these so-called brain-computer interface technologies can be tiring and burdensome for users, requiring frequent disruptions for recalibration when the decoded neural signals change. Jarosiewicz and colleagues therefore combined three calibration methods—retrospective target interference, velocity bias correction, and adaptive tracking of neural features—for seamless typing and stable neural control. This combination allowed two individuals with tetraplegia and with cortical microelectrode arrays to compose long texts at their own paces, with no need to interrupt typing for recalibration.

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