Sparse canonical correlation analysis relates network-level atrophy to multivariate cognitive measures in a neurodegenerative population

作者：Avants Brian B^*; Libon David J; Rascovsky Katya; Boller Ashley; McMillan Corey T; Massimo Lauren; Coslett H Branch; Chatterjee Anjan; Gross Rachel G; Grossman Murray

来源：NeuroImage, 2014, 84: 698-711.

DOI：10.1016/j.neuroimage.2013.09.048

• Alzheimer disease
• Frontotemporal lobar degeneration
• Philadelphia Brief Assessment of Cognition
• PBAC
• MRI
• Sparse canonical correlation analysis

This study establishes that sparse canonical correlation analysis (SCCAN) identifies generalizable, structural MRI-derived cortical networks that relate to five distinct categories of cognition. We obtain multivariate psychometrics from the domain-specific sub-scales of the Philadelphia Brief Assessment of Cognition (PBAC). By using a training and separate testing stage, we find that PBAC-defined cognitive domains of language, visuospatial functioning, episodic memory, executive control, and social functioning correlate with unique and distributed areas of gray matter (GM). In contrast, a parallel univariate framework fails to identify, from the training data, regions that are also significant in the left-out test dataset The cohort includes 164 patients with Alzheimer's disease, behavioral-variant frontotemporal dementia, semantic variant primary progressive aphasia, non-fluent/agrammatic primary progressive aphasia, or corticobasal syndrome. The analysis is implemented with open-source software for which we provide examples in the text. In conclusion, we show that multivariate techniques identify biologically-plausible brain regions supporting specific cognitive domains. The findings are identified in training data and confirmed in test data.

• 出版日期2014-1-1