Document Detail


Increased intrasubject variability in boys with ADHD across tests of motor and cognitive control.
MedLine Citation:
PMID:  23135288     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Increased intrasubject variability (ISV), or short-term, within-person fluctuations in behavioral performance is consistently found in Attention-Deficit/Hyperactivity Disorder (ADHD). ADHD is also associated with impairments in motor control, particularly in boys. The results of the few studies that have examined variability in self-generated motor output in children with ADHD have been inconsistent. The current study examined variability in motor control during a finger sequencing task among boys with and without ADHD as well as the relationship between intrasubject variability during motor and cognitive control tasks. Changes in performance over the course of the task and associations with ADHD symptom domains were also examined to elucidate the nature of impaired motor control in children with ADHD. Fifty-one boys (ages 8 to 12 years) participated in the study, including 28 boys with ADHD and 23 typically developing (TD) boys. Participants completed a finger sequencing task and a Go/No-Go task providing multiple measures of response speed and variability. Boys with ADHD were slower and more variable in both intertap interval on the finger sequencing task and reaction time on the Go/No-Go task, with measures of speed and variability correlated across the two tasks. For the entire cohort, the only unique predictor of parent ratings of hyperactive-impulsive symptoms was variability in intertap interval during finger sequencing, whereas inattentive symptoms were only predicted by reaction time variability on the Go/No-Go task. These findings suggest that inefficient motor control is implicated in the pathophysiology of ADHD, particularly in regards to developmentally inappropriate levels of hyperactivity and impulsivity.
Authors:
Keri Shiels Rosch; Benjamin Dirlikov; Stewart H Mostofsky
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of abnormal child psychology     Volume:  41     ISSN:  1573-2835     ISO Abbreviation:  J Abnorm Child Psychol     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-18     Completed Date:  2013-09-11     Revised Date:  2014-04-10    
Medline Journal Info:
Nlm Unique ID:  0364547     Medline TA:  J Abnorm Child Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  485-95     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Attention Deficit Disorder with Hyperactivity / physiopathology*
Child
Cognition / physiology*
Humans
Male
Motor Skills / physiology*
Reaction Time / physiology
Task Performance and Analysis
Grant Support
ID/Acronym/Agency:
R01 MH078160/MH/NIMH NIH HHS; R01 MH078160/MH/NIMH NIH HHS; R01 MH085328/MH/NIMH NIH HHS; R01 MH085328/MH/NIMH NIH HHS; UL1 RR025005/RR/NCRR NIH HHS
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