Columbia EEG interface lets some unresponsive patients control a tone
A Columbia University team tested a non-invasive EEG brain-computer interface on 41 clinically unresponsive patients with acute brain injuries; about one in three controlled a beeping tone using brain activity alone. The study, published in Brain, is an early demonstration, not yet a way for patients to communicate specific needs or wishes.
Bottom line — All eight patients identified with cognitive motor dissociation controlled the tone, but the study does not establish that the interface can convey patients’ needs.
Go deeper 5
-
The system used EEG electrodes already familiar in intensive care, rather than an implanted brain device, according to NR Times.
-
Patients heard a tone and tried to change its frequency by imagining opening and closing their hands; bedside software analysed their brain signals in real time, EuropHospital reports.
-
Quomi reports that 13 of the 41 patients controlled the system; all eight whose cognitive motor dissociation was identified in a separate assessment succeeded.
-
Claassen’s team detected signs of hidden consciousness in 15% of unresponsive patients in a 2019 study using EEG and AI, according to NR Times.
-
The study’s longer-term aim is to enable communication about basic needs such as pain or hunger; families suggested familiar voices and culturally relevant prompts, EuropHospital reports.