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BMC Medicine
Published in: BMC Medicine 1/2015

Open Access 01-12-2015 | Research article

Cerebral response to subject’s own name showed high prognostic value in traumatic vegetative state

Authors: Fuyan Wang, Haibo Di, Xiaohua Hu, Shan Jing, Aurore Thibaut, Carol Di Perri, Wangshan Huang, Yunzhi Nie, Caroline Schnakers, Steven Laureys

Published in: BMC Medicine | Issue 1/2015

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Abstract

Background

Previous studies have shown the prognostic value of stimulation elicited blood-oxygen-level-dependent (BOLD) signal in traumatic patients in vegetative state/unresponsive wakefulness syndrome (VS/UWS). However, to the best of our knowledge, no studies have focused on the relevance of etiology and level of consciousness in patients with disorders of consciousness (DOC) when explaining the relationship between BOLD signal and both outcome and signal variability. We herein propose a study in a large sample of traumatic and non-traumatic DOC patients in order to ascertain the relevance of etiology and level of consciousness in the variability and prognostic value of a stimulation-elicited BOLD signal.

Methods

66 patients were included, and the response of each subject to his/her own name said by a familiar voice (SON-FV) was recorded using fMRI; 13 patients were scanned twice in the same day, respecting the exact same conditions in both cases. A behavioral follow-up program was carried out at 3, 6, and 12 months after scanning.

Results

Of the 39 VS/UWS patients, 12 (75%) out of 16 patients with higher level activation patterns recovered to minimally conscious state (MCS) or emergence from MCS (EMCS) and 17 (74%) out of 23 patients with lower level activation patterns or no activation had a negative outcome. Taking etiology into account for VS/UWS patients, a higher positive predictive value was assigned to traumatic patients, i.e., up to 92% (12/13) patients with higher level activation pattern achieved good recovery whereas 11 out of 13 (85%) non-traumatic patients with lower level activation or without activation had a negative clinical outcome. The reported data from visual analysis of fMRI activation patterns were corroborated using ROC curve analysis, which supported the correlation between auditory cortex activation volume and VS/UWS patients’ recovery. The average brain activity overlap in primary and secondary auditory cortices in patients scanned twice was 52%.

Conclusions

The activation type and volume in auditory cortex elicited by SON-FV significantly correlated with VS/UWS patients’ prognosis, particularly in patients with traumatic etiology, however, this could not be established in MCS patients. Repeated use of this simple fMRI task might help obtain more reliable prognostic information.
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Metadata
Title
Cerebral response to subject’s own name showed high prognostic value in traumatic vegetative state
Authors
Fuyan Wang
Haibo Di
Xiaohua Hu
Shan Jing
Aurore Thibaut
Carol Di Perri
Wangshan Huang
Yunzhi Nie
Caroline Schnakers
Steven Laureys
Publication date
01-12-2015
Publisher
BioMed Central
Published in
BMC Medicine / Issue 1/2015
Electronic ISSN: 1741-7015
DOI
https://doi.org/10.1186/s12916-015-0330-7

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