A new study will contribute to the problem of defining human consciousness. In most cases, a conscious or unconscious person is easy to diagnose. However, there are some cases that, usually after a serious brain injury, where it is difficult to tell if an unresponsive person is no longer truly conscious.
The diagnosis of someone's consciousness can be a matter of life or death when the answer has implications for the type of ongoing care they receive. A new collaborative study gathered brain activity data via functional MRI from the 150 different people at four different locations.
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