Paper Info
Title
Cognitive ability changes and dynamics of cortical thickness development in healthy children and adolescents.
Abstract
Intelligence quotient (IQ) scores tend to remain stable across the lifespan. Nevertheless, in some healthy individuals, significant decreases or increases in IQ have been observed over time. It is unclear whether such changes reflect true functional change or merely measurement error. Here, we applied surface-based corticometry to investigate vertex-wise cortical surface area and thickness correlates of changes in Full Scale IQ (FSIQ), Performance IQ (PIQ) and Verbal IQ (VIQ) in a representative sample of children and adolescents (n=188, mean age=11.59years) assessed two years apart as part of the NIH Study of Normal Brain Development. No significant associations between changes in IQ measures and changes in cortical surface area were observed, whereas changes in FSIQ, PIQ, and VIQ were related to rates of cortical thinning, mainly in left frontal areas. Participants who showed reliable gains in FSIQ showed no significant changes in cortical thickness on average, whereas those who exhibited no significant FSIQ change showed moderate declines in cortical thickness. Importantly, individuals who showed large decreases in FSIQ displayed the steepest and most significant reductions in cortical thickness. Results support the view that there can be meaningful cognitive ability changes that impact IQ within relatively short developmental periods and show that such changes are associated with the dynamics of cortical thickness development.
Year
DOI
Venue
2014
10.1016/j.neuroimage.2013.09.038
NeuroImage
Keywords
Field
DocType
Intelligence,IQ,Brain development,Brain plasticity,Cortical thickness,Verbal IQ,Performance IQ
Brain development,Developmental psychology,Intelligence quotient,Cognitive psychology,Psychology,Cerebral cortex,Neuroplasticity,Cognition,Performance IQ,Cortical thinning
Journal
Volume
ISSN
Citations 
84
1053-8119
6
PageRank 
References 
Authors
0.53
11
5
Name
Order
Citations
PageRank
Miguel Burgaleta1111.72
Wendy Johnson2181.29
Deborah P. Waber3252.03
Roberto Colom4505.91
Sherif Karama5655.15