title: Selective association between cortical thickness and reference abilities in normal aging.
abstract: A previous study of reference abilities and cortical thickness reported that association between reference abilities and cortical thickness summarized over large ROIs suppressed was suppressed after controlling for mean cortical thickness and global cognition. In this manuscript, we showed that preserving detailed spatial patterns of cortical thickness can identify reference-ability-specific association besides the association explained by global cognition and mean cortical thickness. We identified associations between cortical thickness and 3 cognitive reference abilities after controlling for mean thickness, global cognition, and linear chronological age: (1) memory, (2) perceptual speed, and (3) vocabulary. Global cognition was correlated with mean overall thickness but also was found to have a regionally specific pattern of associations. Nonlinear associations between cortical thickness and cognition were not observed, neither were nonlinear age effects. Age-by-thickness interactions were also absent. This implies that all thickness-cognition relations and age associations are independent of age and that consequently no age range is inherently special, since brain-behavioral findings are invariant across the whole age range.
authors.affiliation: Division of Biostatistics, New York State Psychiatric Institute, New York, NY, USA; Department of Psychiatry, Columbia University, New York, NY, USA.
authors.forename: Seonjoo
authors.initials: S
authors.lastname: Lee
authors.affiliation: Division of Cognitive Neuroscience, Department of Neurology, Columbia University, New York, NY, USA.
authors.forename: Christian
authors.initials: C
authors.lastname: Habeck
authors.affiliation: Division of Cognitive Neuroscience, Department of Neurology, Columbia University, New York, NY, USA.
authors.forename: Qolamreza
authors.initials: Q
authors.lastname: Razlighi
authors.affiliation: Department of Psychology, University of Virginia, Charlottesville, VA, USA.
authors.forename: Timothy
authors.initials: T
authors.lastname: Salthouse
authors.affiliation: Division of Cognitive Neuroscience, Department of Neurology, Columbia University, New York, NY, USA. Electronic address: ys11@columbia.edu.
authors.forename: Yaakov
authors.initials: Y
authors.lastname: Stern
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D001076:Aptitude / Q000502:physiology; D002540:Cerebral Cortex / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D000066492:Cognitive Aging / Q000502:physiology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D025341:Principal Component Analysis; D012044:Regression Analysis; D055815:Young Adult
keywords: Cognitive aging; L-1 regularization; Multivariate multiple regression; Normal aging; Principal component analysis; Reference abilities