Detailed contribution information
| Contribution title | 3474 - Visual Dorsal Stream functioning correlated with executive functions in Attention-Deficit/Hyperactivity Disorder: Neuropsychological Study |
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| Contribution code | PS01-55 (P) |
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| Form of presentation | Poster |
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| Abstract |
Objectives: Ventral and dorsal streams in visual information-processing are accounted for vision-for-perception and vision-for-action, respectively. Traditional neuropsychological evidence suggests that neuroanatomical correlates of Benton Facial Recognition (“FRT”) and Judgment of Line Orientation Tests (“JLO”) reflect ventral and dorsal stream functions. FRT is considered to be more of an “occipitotemporal”, whereas JLO is considered more of an “occipitoparietal” right hemisphere. Dorsal frontoparietal attention network is active when voluntary, goal-directed attention is engaged. Thus, JLO test scores, when compared to FRT scores, are expected to be more correlated with executive functions composed of inhibitory control, working memory and cognitive flexibility. Methods: Fourty-six children (30 boys and 16 girls), aged between 7 and 9 (mean age:7.87±0.79), diagnosed with ADHD according to the DSM-IV-TR criteria, were recruited to the study. All subjects were given a neuropsychological test battery including General Intelligence, Benton FRT and JLO visual perception tests and executive functions. Full scale IQ was evaluated with Wechsler Intelligence Scale For Children-Revised (WISC-R). Subjects’ Total IQ scores (mean=107.97±1.44 ; range: 80-137) were in the normal range. Executive functions were assessed with Wisconsin Card Sorting Test (WCST), Stroop Task, Visual Span Subtests of Wechsler Memory Scales and Digit Span Subtest of WISC-R. Partial correlational analysis was conducted by the criterion of age. Results: The performance of JLO test was inversely correlated with Stroop Interferance Condition (r= - 0.49; p=0.001) and the percentage of perseverative error responses in WCST (r= - 0.40; p=0.006), whereas it was positively correlated with visual (r= 0.48; p=0.001) and auditory (r= 0.48; p=0.001) reverse digit performances. On the other hand, the subjects’ performance in FRT was positively correlated only with visual reverse digit performance (r= - 0.35; p=0.024). Conclusion: Our results suggest that JLO test performance, unlike the FRT test performance, is more strongly related to executive function components; namely inhibitory control, working memory and cognitive flexibility, which are subserved by fronto parietal top-down attention network. |