Simon W Davis

September 4, 2013

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Simon Davis (simon.davis@duke.edu)

purchase helvetica, sans-serif;”>My research now centers around the use of structural and functional imaging measures to study the shifts in network architecture in the aging brain. I am specifically interested in changes in how changes in structural and functional connectivity associated with aging impact the semantic retrieval of word or fact knowledge. Currently this involves asking why older adults have particular difficulty in certain kinds of semantic retrieval, despite the fact that vocabularies and knowledge stores typically improve with age.

A second line of research involves asking questions about how this semantic system is organized in young adults, understanding which helps form a basis for asking questions about older adults. To what degree are these semantic retrieval processes lateralized? What cognitive factors affect this laterality? How are brain structures like the corpus callosum involved in mediating distributed activation patterns associated with semantic retrieval? 

 

Representative Publications

Davis SW & Cabeza R. Cross-Hemispheric Collaboration and Segregation Associated with Task Difficulty as Revealed by Structural and Functional Connectivity. 2015. Journal of Neuroscience. 35:8191-9200. PDF

Kievet RA, Davis SW, Mitchell DJ, Taylor JR, Duncan J, Henson RNA. Distinct aspects of frontal lobe structure mediate age-related differences in fluid intelligence and multitasking. in press. Nature Communications.

Davis SW, Zhuang J, Wright P, Tyler LK. Task-related modulation of neurocognitive networks in aging. 2014. Neuropsychologia. 63:107-15. PDF

Hall SA, Rubin DC, Miles A, Davis SW, Wing EA, Cabeza R, Berntsen D. 2014. The Neural Basis of Involuntary Episodic Memories. Journal of Cognitive Neuroscience.

Davis SW, Kragel JE, Madden DJ, Cabeza R. 2011. The architecture or cross-hemispheric communication in aging: Linking behavior to structural and functional connectivity. Cerebral Cortex, 21(4), 231-42PDF

Davis SW, Dennis, NA, Buchler, NEG, Madden DJ, White LE, Cabeza R. 2009. Assessing the effects of age on long association fibers using DTI tractography. NeuroImage. 46, 530-541. PDF

Madden, D.J, Spaniol, J, Costello, M, Bucur, B, White LE, Cabeza, R, Davis, S.W, Dennis, N.A, Provenzale, J.M, Huettel, S.A. 2009. Cerebral white matter integrity mediates adult age differences in cognitive performance. Journal of Cognitive Neuroscience. 21, 289-302.

Davis SW, Dennis NA, Daselaar, SM, Fleck, ME, Cabeza, R. 2008. Que PASA? The posterior-anterior shift in aging. Cerebral Cortex. 18(5), 1201-1209. *Reviewed by Faculty of 1000, Medicine: Must Read  PDF

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