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Executive function following child stroke: the impact of lesion location
Brian Long1, Megan M Spencer-Smith, Rani Jacobs
1University of Melbourne, Melbourne, Australia.
Insights
Pediatric stroke survivors often experience executive function deficits, even with normal intelligence. Lesion location, particularly subcortical frontal, significantly impacts everyday executive skills in children post-stroke.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Developmental Psychology
Background:
- Childhood stroke is a significant cause of mortality, with limited data on long-term neurobehavioral outcomes.
- Executive function, crucial for goal-directed actions, is susceptible to early brain injury due to its widespread neural representation in developing brains.
Purpose of the Study:
- To investigate how the location of brain lesions influences executive functioning in children who have experienced a stroke.
- To assess both cognitive and practical, everyday executive skills in pediatric stroke survivors.
Main Methods:
- Recruited 28 children with a confirmed stroke diagnosis at least 18 months prior to evaluation.
- Analyzed lesion characteristics using magnetic resonance imaging (MRI) scans.
- Conducted neurobehavioral assessments focusing on cognitive abilities and daily executive functioning.
Main Results:
- Pediatric stroke survivors demonstrated executive skill deficits despite generally normal intellectual functioning.
- Brain insults in frontal and extra-frontal regions similarly affected cognitive performance.
- Everyday executive skill impairments were more pronounced after frontal lobe insults, especially those involving subcortical frontal lesions.
Conclusions:
- Executive function appears to be diffusely represented in the immature brain, making it vulnerable to various lesion locations.
- Specific lesion sites, like subcortical frontal areas, are linked to distinct deficits in daily executive skills in children.
- Findings underscore the importance of assessing comprehensive executive functioning in pediatric stroke recovery.
Abstract:
Child stroke is a major cause of death in children, although limited information exists on neurobehavioral functioning of stroke survivors. Executive function (important for goal-directed behavior) is thought to be vulnerable to early insults such as stroke because of its widespread representation in the immature brain. This study investigated the impact of lesion location on executive skills. Twenty-eight children diagnosed with stroke at least 18 months before assessment were recruited. Lesion characteristics were coded from magnetic resonance imaging (MRI) scans. Neurobehavioral assessment focused on cognitive and everyday executive skills. Deficits were found in the context of overall normal intellectual functioning (M = 91.60; SD = 19.40). Generally, insults involving frontal and extra-frontal regions impacted equally on cognitive performance. Everyday deficits were marginally more prominent following frontal insult. Subcortical frontal lesions were associated with impairments in everyday executive skills. Results provide further support for the diffuse representation of executive function in the immature brain.
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