Gauging Ability of Non-Responsive Patients To Follow Commands and Communicate

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Released: 8/9/2013 12:15 PM EDT
Embargo expired: 8/12/2013 4:00 PM EDT
Source Newsroom: American Medical Association (AMA)

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Newswise — A case study using functional magnetic resonance imaging suggests that behaviorally nonresponsive patients can use selective auditory attention to convey their ability to follow commands and communicate, according to a small study by Lorina Naci, Ph.D., and Adrian M. Owen, Ph.D., of Western University, London, Ontario, Canada.

The study included three patients with severe brain injury, two diagnosed as being in a minimally conscious state and one as being in a vegetative state. Functional magnetic resonance imaging data were acquired as the patients were asked to selectively attend to auditory stimuli, thereby conveying their ability to follow commands and communicate.

All patients demonstrated command following according to instructions. Two patients (one in a minimally conscious state and one in a vegetative state) were also able to guide their attention to repeatedly communicate correct answers to binary (yes or no) questions, according to the study results.

"To our knowledge, in this study we establish for the first time that some entirely behaviorally nonresponsive patients can use selective attention to communicate," the study concludes. "Moreover, this technique assesses selective attention, a basic building block of human cognition, which underlies many complex faculties, including reasoning and, more broadly, information processing."
(JAMA Neurol. Published online August 12, 2013. doi:10.1001/.jamaneurol.2013.3686. Available pre-embargo to the media at http://media.jamanetwork.com.)

Editor's Note: This study was supported by the DECODER Project, the European Commission in the 7th Framework Programme, the James S. McDonnell Foundation, and the Canada Excellence Research Chairs Program. Please see the articles for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.

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Institute of Food Technologists (IFT) 13 Aug, 2013

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