Doctors discover 'hidden consciousness' in comatose patients in medical breakthrough

Scientists have discovered a hidden sign of consciousness in comatose patients that shows they can hear and understand the world around them. The study found bursts of organized, fast frequencies within the patient's normal sleep patterns when they were exposed to stimuli such as their doctor talking. Researchers at Columbia University analyzed 226 recent comatose patients, observing a third displayed the unique bursts - a phenomenon scientists call'sleep spindles.' Brain circuits that are fundamental for consciousness are also key to how we sleep, the Columbia team explained. Moreover, scientists said comatose patients with this type of'hidden consciousness' showed signs they were already on the road to recovery from their brain injuries and many dealt with fewer disabilities later in life.