Attentional Control and Intelligence: MRI Orbital Frontal Gray Matter and Neuropsychological Correlates
View/ Open
Author
Nakamura, Motoaki
Newell, Dominick T.
Published Version
https://doi.org/10.1155/2015/354186Metadata
Show full item recordCitation
Nestor, Paul G., Motoaki Nakamura, Margaret Niznikiewicz, James J. Levitt, Dominick T. Newell, Martha E. Shenton, and Robert W. McCarley. 2015. “Attentional Control and Intelligence: MRI Orbital Frontal Gray Matter and Neuropsychological Correlates.” Behavioural Neurology 2015 (1): 354186. doi:10.1155/2015/354186. http://dx.doi.org/10.1155/2015/354186.Abstract
Attentional control is a key function of working memory that is hypothesized to play an important role in psychometric intelligence. To test the neuropsychological underpinnings of this hypothesis, we examined full-scale IQ, as measured by the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III), and attentional control, as measured by Trails B response time and Wisconsin Card Sorting (WCS) test perseverative errors in 78 healthy participants, 25 of whom also had available magnetic resonance imaging (MRI) gray matter volume studies of the orbital frontal cortex (OFC) parcellated into three regions: gyrus rectus, middle orbital gyrus, and lateral orbital gyrus. Hierarchical regression indicated that Trails B response time specifically explained 15.13% to 19.18% of the variation in IQ and WCS perseverative errors accounted for an additional 8.12% to 11.29% of the variance. Full-scale IQ correlated very strongly with right middle orbital gyrus gray matter volume (r = 0.610, p = 0.002), as did Trails B response time with left middle orbital gyrus gray matter volume (r = −0.608, p = 0.003). Trails B response time and right middle orbital gyrus gray matter volume jointly accounted for approximately 32.95% to 54.82% of the variance in IQ scores. These results provided evidence of the unique contributions of attentional control and OFC gray matter to intelligence.Other Sources
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4460198/pdf/Terms of Use
This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAACitable link to this page
http://nrs.harvard.edu/urn-3:HUL.InstRepos:17295714
Collections
- HMS Scholarly Articles [17922]
Contact administrator regarding this item (to report mistakes or request changes)