NDLI: Spatial analysis after perinatal stroke: patterns of neglect and exploration in extra-personal space

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Spatial analysis after perinatal stroke: patterns of neglect and exploration in extra-personal space

Content Provider	PubMed Central
Author	Thareja, Tarika Ballantyne, Angela Trauner, Doris
Copyright Year	2012
Abstract	This study was conducted to determine whether school-aged children who had experienced a perinatal stroke demonstrate evidence of persistent spatial neglect, and if such neglect was specific to the visual domain or was more generalized. Two studies were carried out. In the first, 38 children with either left hemisphere (LH) or right hemisphere (RH) damage and 50 age-matched controls were given visual cancellation tasks varying in two factors: target stimuli and stimulus array. In the second study, tactile neglect was evaluated in 41 children with LH or RH damage and 72 age-matched controls using a blindfolded manual exploration task. On the visual cancellation task, LH subjects omitted more target stimuli on the right, but also on the left, compared with controls. Children with RH lesions also produced a larger number of omissions on both the left and right sides than controls, but with poorer performance on the left. On the manual exploration task, LH children required significantly longer times to locate the target on both sides of the board than did controls. RH children had significantly prolonged search times on the left side, but not on the right, compared with controls. In both tasks, LH subjects employed unsystematic search strategies more often than both control and RH children. The search strategy of RH children also tended to be erratic when compared to controls, but only in the random arrays of the visual cancellation tasks; structure of the target stimuli improved their organization. These results demonstrate that children with early LH brain damage display bilateral difficulties in visual and tactile modalities; a pattern that is in contrast to that seen in adults with LH damage. This may result from disorganized search strategies or other subtle spatial or attentional deficits. Results of performance of RH children suggests the presence of contralateral neglect in both the visual and tactile modalities; a finding that is similar to the neglect in adult stroke patients with RH lesions. The fact that deficits in spatial attention and organizational strategies are present after very early focal damage to either the LH or the RH broadens our understanding of the differences in functional lateralization between the immature and mature brain. These results also add to evidence for limitations to plasticity in the developing brain. Our findings may have therapeutic and rehabilitative implications for the management of children with early focal brain lesions.
Related Links	http://dx.doi.org/10.1016/j.bandc.2012.02.009
Ending Page	116
Page Count	10
Starting Page	107
File Format	PDF
ISSN	02782626
e-ISSN	10902147
Journal	Brain and Cognition
Issue Number	2
Volume Number	79
Language	English
Publisher Date	2012-07-01
Access Restriction	Open
Subject Keyword	Experimental and Cognitive Psychology Cognitive Neuroscience Neuropsychology and Physiological Psychology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Arts and Humanities Cognitive Neuroscience Developmental and Educational Psychology Neuropsychology and Physiological Psychology

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