Abstract
In 24 children with developmental learning disabilities and 15 age-matched controls regional cerebral activity was studied with xenon-133 single photon emission tomography. In the 9 children with pure attention deficit and hyperactivity disorder (ADHD), the distribution of regional cerebral activity was abnormal--low in striatal and posterior periventricular regions and high in occipital regions. Low activity in striatal and posterior periventricular areas was also seen in the 8 children with ADHD in combination with phonologic-syntactic dysphasia. 7 children with dysphasia, but without hyperactive behaviour, had low cerebral activity in left temporofrontal regions.
MeSH terms
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Adolescent
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Attention Deficit Disorder with Hyperactivity / diagnostic imaging
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Attention Deficit Disorder with Hyperactivity / physiopathology*
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Caudate Nucleus / blood supply
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Caudate Nucleus / diagnostic imaging
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Cerebrovascular Circulation*
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Child
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Color
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Evaluation Studies as Topic
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Female
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Frontal Lobe / blood supply
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Frontal Lobe / diagnostic imaging
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Humans
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Language Disorders / diagnostic imaging
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Language Disorders / physiopathology*
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Learning Disabilities / physiopathology
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Male
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Occipital Lobe / blood supply
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Occipital Lobe / diagnostic imaging
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Temporal Lobe / blood supply
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Temporal Lobe / diagnostic imaging
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Tomography, Emission-Computed, Single-Photon
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Xenon Radioisotopes