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TagCovert consciousness

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Comatose male patient in hospital.

Covert Consciousness: When “Brain Dead” Doesn’t Mean Unconscious

Now that brain scan studies have established that at least 25% of people classed as brain dead can respond, doctors ask what to do for them?
New brain implant technology may help covertly conscious people make contact because neurons can interface with electrical systems. Read More ›
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Upset senior man visiting wife in coma in hospital

Study: 25% of Coma Patients Showed Consciousness When Tested

Making contact with patients via brain scanning technology is a first step toward treatment of those who may now be deemed hopeless cases
Comatose patients who are aware but cannot communicate in usual ways might be helped by new brain–computer interface (BCI) technologies. Read More ›
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side view of senior man in coma on bed in hospital

Researchers: Comatose People Can Have “Covert Consciousness”

Claassen and Edlow found that the brain patterns of a woman who could not respond physically to commands showed that she recognized them

Columbia University neurologist Jan Claassen and Harvard medical school neurologist Brian L. Edlow introduce us to a vital new concept in consciousness: “covert consciousness,” which is experienced by 15–20% of people who are in a coma: Thirty-year-old New York City resident Maria Murkevich, for example, suffered a ruptured blood vessel in her brain and was comatose. Conventional tests (wiggle your toes, etc.) produced no response but her loved ones still believed she was “in there.”: They were right. But it took a high-tech method to demonstrate that: The medical team gave her an EEG — placing sensors on her head to monitor her brain’s electrical activity — while they asked her to “keep opening and closing your right hand.” Then Read More ›