کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
924164 921198 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Distributed attentional deficits in chronic methamphetamine abusers: Evidence from the Attentional Network Task (ANT)
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
پیش نمایش صفحه اول مقاله
Distributed attentional deficits in chronic methamphetamine abusers: Evidence from the Attentional Network Task (ANT)
چکیده انگلیسی

ObjectiveThe goal of the present study was to examine distributed attentional functions in long-term but currently abstinent methamphetamine (MA) abusers using a task that measures attentional alertness, orienting, and conflict resolution.MethodsThirty currently abstinent MA abusers (1 month–5 years) and 22 healthy non-substance using adults were administered a multimodal version of the Attentional Network Task (ANT-I). In this task subjects identified the direction of a centrally presented arrow using a key press. Analyses examined the interaction between alerting tones, location cueing and congruency between the target arrows and flanking distractor stimuli.ResultsAll participants were faster when an auditory tone preceded the trial onset (p < 0.001), on trials in which a valid cue preceded the location of the target arrow (p < 0.001), and on congruent trials (i.e., when all display arrows faced in the same direction) (p < 0.001). Of primary interest was the finding that MA abusers were more influenced by the conflict between the peripheral arrows and the central target arrow (p = 0.009). There were also correlations between length of drug sobriety and executive function as well as between drug-induced psychiatric symptoms and alertness.ConclusionsThese results suggest that chronic MA abusers display cognitive deficits that may reflect a specific vulnerability to distraction on a task of executive function. These findings are consistent with other studies that have reported deficits in anterior attentional systems and top-down cognitive control.


► We tested methamphetamine abusers and controls on an integrated attention task.
► The task measured attentional alertness, orienting, and conflict resolution.
► MA abusers displayed deficits in cognitive control and conflict resolution.
► These deficits may reflect a specific vulnerability in executive function.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain and Cognition - Volume 77, Issue 3, December 2011, Pages 446–452
نویسندگان
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