Article (Scientific journals)
Assessment of visual fixatio in vegetative and minimally conscious states
Di, Haibo; Nie, Yunzhi; Hu, Xiaohu et al.
2014In BMC Neurology, 14 (147)
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Keywords :
Disorders of consciousness; vegetative state; unresponsive wakefulness syndrome; minimally conscious state; visual fixation
Abstract :
[en] Background: Visual fixation plays a key role in the differentiation between vegetative state/unresponsive wakefulness (VS/UWS) syndrome and minimally conscious state (MCS). However, the use of different stimuli changes the frequency of visual fixation occured in patients, thereby possibly affecting the accuracy of the diagnosis. In order to establish a standardized assessment of visual fixation in patients in disorders of consciousness (DOC), we compared the frequency of visual fixation elicited by mirror,a ball and a light. Method: Visual fixation was assessed in eighty-one post-comatose patients diagnosed with a MCS or VS/UWS. Occurrence of fixation to different stimuli was analysis used Chi-square testing. Result: 40 (49%) out of the 81 patients showed fixation to visual stimuli. Among those, significantly more patients (39, 48%) had visual fixation elicited by mirror compared to a ball (23, 28%) and mirror compared to a light (20, 25%).Conclusion: The use of a mirror during the assessment of visual fixation showed higher positive response rate, compared to other stimuli in eliciting a visual fixating response. Therefore, fixation elicited by a mirror can be a very sensitive and accurate test to differentiate the two disorders of consciousness.
Disciplines :
Neurology
Author, co-author :
Di, Haibo
Nie, Yunzhi
Hu, Xiaohu
Tong, Yong
Heine, Lizette ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Wannez, Sarah ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Huang, Wangshan
Yu, Dan
He, Minhui
Thibaut, Aurore ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Schnakers, Caroline
Laureys, Steven  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Language :
English
Title :
Assessment of visual fixatio in vegetative and minimally conscious states
Publication date :
2014
Journal title :
BMC Neurology
eISSN :
1471-2377
Publisher :
BioMed Central
Volume :
14
Issue :
147
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 January 2015

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