J
John Powers
Researcher at Duke University
Publications - 34
Citations - 2383
John Powers is an academic researcher from Duke University. The author has contributed to research in topics: Primary progressive aphasia & Frontotemporal lobar degeneration. The author has an hindex of 19, co-authored 31 publications receiving 2057 citations. Previous affiliations of John Powers include University of Pennsylvania & Hospital of the University of Pennsylvania.
Papers
More filters
Journal ArticleDOI
Consensus recommendations for the postmortem diagnosis of Alzheimer's disease
M. Ball,Heiko Braak,P. Coleman,Dennis W. Dickson,C. Duyckaerts,P. Gambetti,L. Hansen,Bradley T. Hyman,K. Jellinger,W. Markesbery,D. Perl,John Powers,J. Price,John Q. Trojanowski,H. M. Wisniewski,Creighton H. Phelps,Z. Khachaturian +16 more
TL;DR: The consensus recommendations for improving the neuropathological criteria for the postmortem diagnosis of Alzheimer's disease are reported here, and the "position papers" by members of the Working Group that accompany this report elaborate on the research findings and concepts upon which these recommendations were based.
Journal ArticleDOI
Cognitive decline and reduced survival in C9orf72 expansion frontotemporal degeneration and amyotrophic lateral sclerosis
David J. Irwin,Corey T. McMillan,Johannes Brettschneider,Johannes Brettschneider,David J. Libon,David J. Libon,John Powers,Katya Rascovsky,Jon B. Toledo,Ashley Boller,Jonathan M. Bekisz,Keerthi Chandrasekaran,Elisabeth M. Wood,Elisabeth M. Wood,Leslie M. Shaw,John H. Woo,Philip A. Cook,David A. Wolk,Steven E. Arnold,Steven E. Arnold,Vivianna M. Van Deerlin,Leo McCluskey,Lauren Elman,Virginia M.-Y. Lee,Virginia M.-Y. Lee,John Q. Trojanowski,John Q. Trojanowski,Murray Grossman +27 more
TL;DR: C9P cases may have a shorter survival in ALS and more rapid rate of cognitive decline related to frontal and parietal disease in FTLD, and C9orf72 genotyping may provide useful prognostic and diagnostic clinical information for patients with ALS and FTLD.
Journal ArticleDOI
Differentiating primary progressive aphasias in a brief sample of connected speech
Sharon Ash,Emily C. Evans,Jessica O'Shea,John Powers,Ashley Boller,Danielle Weinberg,Jenna Haley,Corey T. McMillan,David J. Irwin,Katya Rascovsky,Murray Grossman +10 more
TL;DR: Findings provide evidence that large-scale networks are required for fluent, grammatical expression; that these networks can be selectively disrupted in PPA syndromes; and that quantitative analysis of a brief speech sample can reveal the corresponding distinct speech characteristics.
Journal ArticleDOI
Effects of repetitive transcranial magnetic stimulation on resting-state connectivity: A systematic review.
TL;DR: A systematic review of 33 rTMS studies with baseline and post-rTMS measures of fMRI resting-state functional connectivity (RSFC) finds variability across studies in stimulation parameters, studied populations, and connectivity analysis methodology, suggesting that rT MS effects tend to spread across networks.
Journal ArticleDOI
White matter imaging helps dissociate tau from TDP-43 in frontotemporal lobar degeneration
Corey T. McMillan,David J. Irwin,Brian B. Avants,John Powers,Philip A. Cook,Jon B. Toledo,Elisabeth M. Wood,Vivianna M. Van Deerlin,Virginia M.-Y. Lee,John Q. Trojanowski,Murray Grossman +10 more
TL;DR: These neuroimaging and neuropathological investigations provide converging evidence for greater WM burden associated with FTLD-TAU, and emphasise the role of WM neuroim imaging for in vivo discrimination between FTLD -TAU andFTLD-TDP.