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Visual event-related potentials as markers of hyperarousal in Gulf War illness: evidence against a stress-related etiology.

Abstract：

:An exaggerated response to emotional stimuli is among the many symptoms widely reported by veterans of the 1991 Persian Gulf War. These symptomologies have been attributed to damage and dysfunction associated with deployment-related exposures. We collected event-related potential data from 22 veterans meeting Haley criteria for Gulf War (GW) Syndromes 1-3 and from 8 matched GW veteran controls, who were deployed but not symptomatic, while they performed a visual three-condition oddball task where images authenticated to be associated with the 1991 Persian Gulf War were the distractor stimuli. Hyperarousal reported by ill veterans was significantly greater than that by control veterans, but this was not paralleled by higher amplitude P3a in their ERP responses to GW-related distractor stimuli. Whereas previous studies of PTSD patients have shown higher amplitude P3b responses to target stimuli that are placed amid trauma-related nontarget stimuli, ill veterans in this study showed P3b amplitudes to target stimuli - placed amid GW-related nontarget stimuli - that were significantly lower than those of the control group. Hyperarousal scores reliably predicted P3b, but not P3a, amplitudes. Although many factors may contribute to P3b amplitude differences - most notably depression and poor sleep quality, symptoms that are prevalent in the GW syndrome groups - our findings in context of previous studies on this population are consistent with the contention that dysfunction in cholinergic and dopaminergic neurotransmitter systems, and in white matter and basal ganglia may be contributing to impairments in GW veterans.

journal_name

Psychiatry Res

journal_title

Psychiatry research

authors

Tillman GD,Calley CS,Green TA,Buhl VI,Biggs MM,Spence JS,Briggs RW,Haley RW,Kraut MA,Hart J Jr

doi

10.1016/j.pscychresns.2012.08.004

subject

Has Abstract

pub_date

2013-03-30 00:00:00

pages

257-67

issue

3

eissn

0165-1781

issn

1872-7123

pii

S0925-4927(12)00206-5

journal_volume

211

pub_type

杂志文章

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