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Journal Article
Research Support, Non-U.S. Gov't
Attention deficits in tuberous sclerosis complex (TSC): rethinking the pathways to the endstate.
BACKGROUND: Tuberous sclerosis complex (TSC) is a genetic disorder associated with a range of neurocognitive manifestations, including neuropsychological attention deficits most notably in dual tasking/divided attention. These dual-task deficits have so far been interpreted as evidence of a vulnerable 'cognitive module' in TSC. Here, we suggest that this interpretation represents an 'adult neuropsychological' perspective, and argue that a developmental approach would be more appropriate to examine attention deficits in TSC.
METHOD: We examined the pathway to 'endstate' dual-task deficits in twenty 6-16 year olds with TSC utilising the Test of Everyday Attention for Children (TEA-Ch). We predicted that the pattern of attentional deficits in TSC would support a 'conditional' model where the establishment of a later-maturing skill was dependent on the functional maturation of an earlier expected skill.
RESULTS: Attentional profiles showed statistical support for a conditional model. Only one child showed a deterministic pattern while one showed a hybrid pattern, attributed to the admixture of a surgically acquired lesion and a neurodevelopmental disorder.
CONCLUSION: This preliminary study suggests that the developmental cascade in TSC may be arrested at various stages of neuropsychological development, thus leading to different developmental trajectories towards similar 'endstate' profiles.
METHOD: We examined the pathway to 'endstate' dual-task deficits in twenty 6-16 year olds with TSC utilising the Test of Everyday Attention for Children (TEA-Ch). We predicted that the pattern of attentional deficits in TSC would support a 'conditional' model where the establishment of a later-maturing skill was dependent on the functional maturation of an earlier expected skill.
RESULTS: Attentional profiles showed statistical support for a conditional model. Only one child showed a deterministic pattern while one showed a hybrid pattern, attributed to the admixture of a surgically acquired lesion and a neurodevelopmental disorder.
CONCLUSION: This preliminary study suggests that the developmental cascade in TSC may be arrested at various stages of neuropsychological development, thus leading to different developmental trajectories towards similar 'endstate' profiles.
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