Journal of attention disorders · 2008
Rethinking a right hemisphere deficit in ADHD.
Сравнительное исследованиеСтатьяНазвание и аннотация: Перевод в очереди
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Hale T Sigi, Loo Sandra K, Zaidel Eran, Hanada Grant, Macion James, Smalley Susan L
Аннотация
INTRODUCTION: Early observations from lesion studies suggested right hemisphere (RH) dysfunction in ADHD. However, a strictly right-lateralized deficit has not been well supported. An alternatively view suggests increased R > L asymmetry of brain function and abnormal interhemispheric interaction. If true, RH pathology in ADHD should reflect interhemispherically networked and overactivated functioning. The authors evaluated these assertions.
METHOD: Four elements of lateralized brain function were measured: LH specialized, RH specialized, LH with interhemispheric processing (LH/IH), and RH with interhemispheric processing (RH/IH). Next, the authors tested their association with cognitive ability, psychiatric comorbidity, and sibling correlations in 79 children with ADHD.
RESULTS: RH/IH processing was uniquely associated with other outcome measures. There were no associations for independent RH or LH function alone.
CONCLUSION: Interhemispherically networked RH processing is critical in ADHD. In addition, lack of association between LH specialized processing and cognitive ability (especially for verbal cognitive tasks) supports increased RH mediation of task processing.
METHOD: Four elements of lateralized brain function were measured: LH specialized, RH specialized, LH with interhemispheric processing (LH/IH), and RH with interhemispheric processing (RH/IH). Next, the authors tested their association with cognitive ability, psychiatric comorbidity, and sibling correlations in 79 children with ADHD.
RESULTS: RH/IH processing was uniquely associated with other outcome measures. There were no associations for independent RH or LH function alone.
CONCLUSION: Interhemispherically networked RH processing is critical in ADHD. In addition, lack of association between LH specialized processing and cognitive ability (especially for verbal cognitive tasks) supports increased RH mediation of task processing.