A Brain-Computer Interface that reads brain's blood oxygen l
Scientists have developed a brain-computer interface that reads the brain's blood oxygen levels and enables communication by deciphering the thoughts of patients who are totally paralysed and unable to talk. In a trial of the system in four patients with complete locked-in syndrome - incapable of moving even their eyes to communicate - it helped them use their thought waves to respond yes or no to spoken questions.

The BCI technique used technologies called near-infrared spectroscopy and electroencephalography (EEG) to measure blood oxygenation and electrical activity in the brain. Researchers leading this trial said that the BCI will transform the lives of such patients, allowing them to express feelings and opinion to their loved ones and carers.