Event-related potential indices of visual attention following moderate to severe closed head injury

Cremona-Meteyard S.L. and Geffen G.M. (1994) Event-related potential indices of visual attention following moderate to severe closed head injury. Brain Injury, 8 6: 541-558. doi:10.3109/02699059409151006


Author Cremona-Meteyard S.L.
Geffen G.M.
Title Event-related potential indices of visual attention following moderate to severe closed head injury
Journal name Brain Injury   Check publisher's open access policy
ISSN 0269-9052
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.3109/02699059409151006
Volume 8
Issue 6
Start page 541
End page 558
Total pages 18
Publisher Informa Healthcare
Subject 2728 Clinical Neurology
Abstract Covert orientation of visual attention was studied in eight closed head injury (CHI) subjects who fixated warning cues and pressed a button at peripheral target onset. Directional cues (arrows) indicated the most probable (p == 0·8) side of target occurrence while neutral cues (crosses) gave no directional information. A NoGo cue (vertical bar) indicated no response was required. Compared to eight matched controls the CHI subjects displayed slowed processing of all cues (increased P2, N2 and P3 latencies). Also, evidence was found for very early impairment (increased P2 amplitude) in directing attention. Further, the CHI group did not show the normal attenuated CNV after NoGo signals, suggesting perseverative behaviour. Finally, the amplitude and latency of the P3 component (post-cue and post-target) approached normal as time since injury increased.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 23 Aug 2016, 10:47:11 EST by System User