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10.1002/hbm.22927 http://scihub22266oqcxt.onion/10.1002/hbm.22927 C4692964!4692964!26260856     free     free     free Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Hum+Brain+Mapp 2015 ; 36 (11): 4421-37 Nephropedia Template TP {{tp|p=26260856|t=2015. Atrophy patterns in early clinical stages across distinct phenotypes of Alzheimer s disease |pdf=|usr=}}{{26260856}} gab.com Text Atrophy patterns in early clinical stages across distinct phenotypes of Alzheimer s disease JO: Hum Brain Mapp http://www.kidney.de/pget.php?&tw=1&pmid=26260856 #FOAvip Alzheimer's disease (AD) can present with distinct clinical variants. Identifying the earliest neurodegenerative changes associated with each variant has implications for early diagnosis, and for understanding the mechanisms that underlie regional vulnerability and disease progression in AD. We performed voxel?based morphometry to detect atrophy patterns in early clinical stages of four AD phenotypes: Posterior cortical atrophy (PCA, ?visual variant,? n = 93), logopenic variant primary progressive aphasia (lvPPA, ?language variant,? n = 74), and memory?predominant AD categorized as early age?of?onset (EOAD, <65 years, n = 114) and late age?of?onset (LOAD, >65 years, n = 114). Patients with each syndrome were stratified based on: (1) degree of functional impairment, as measured by the clinical dementia rating (CDR) scale, and (2) overall extent of brain atrophy, as measured by a neuroimaging approach that sums the number of brain voxels showing significantly lower gray matter volume than cognitively normal controls (n = 80). Even at the earliest clinical stage (CDR?=?0.5 or bottom quartile of overall atrophy), patients with each syndrome showed both common and variant?specific atrophy. Common atrophy across variants was found in temporoparietal regions that comprise the posterior default mode network (DMN). Early syndrome?specific atrophy mirrored functional brain networks underlying functions that are uniquely affected in each variant: Language network in lvPPA, posterior cingulate cortex?hippocampal circuit in amnestic EOAD and LOAD, and visual networks in PCA. At more advanced stages, atrophy patterns largely converged across AD variants. These findings support a model in which neurodegeneration selectively targets both the DMN and syndrome?specific vulnerable networks at the earliest clinical stages of AD. Hum Brain Mapp 36:4421?4437, 2015. © 2015 Wiley Periodicals, Inc. Twit Text FOAVip Atrophy patterns in early clinical stages across distinct phenotypes of Alzheimer s disease ????Hum Brain Mapp http://www.kidney.de/pget.php?&tw=1&pmid=26260856 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=26260856 #FOAvip English Wikipedia <ref>{{Cite pmid|26260856}}</ref> Atrophy patterns in early clinical stages across distinct phenotypes of Alzheimer s disease #MMPMID26260856 Ossenkoppele R; Cohn?Sheehy BI; La Joie R; Vogel JW; Möller C; Lehmann M; van Berckel BN; Seeley WW; Pijnenburg YA; Gorno?Tempini ML; Kramer JH; Barkhof F; Rosen HJ; van der Flier WM; Jagust WJ; Miller BL; Scheltens P; Rabinovici GD Hum Brain Mapp 2015[Nov]; 36 (11): 4421-37 PMID26260856show ga Alzheimer's disease (AD) can present with distinct clinical variants. Identifying the earliest neurodegenerative changes associated with each variant has implications for early diagnosis, and for understanding the mechanisms that underlie regional vulnerability and disease progression in AD. We performed voxel?based morphometry to detect atrophy patterns in early clinical stages of four AD phenotypes: Posterior cortical atrophy (PCA, ?visual variant,? n = 93), logopenic variant primary progressive aphasia (lvPPA, ?language variant,? n = 74), and memory?predominant AD categorized as early age?of?onset (EOAD, <65 years, n = 114) and late age?of?onset (LOAD, >65 years, n = 114). Patients with each syndrome were stratified based on: (1) degree of functional impairment, as measured by the clinical dementia rating (CDR) scale, and (2) overall extent of brain atrophy, as measured by a neuroimaging approach that sums the number of brain voxels showing significantly lower gray matter volume than cognitively normal controls (n = 80). Even at the earliest clinical stage (CDR?=?0.5 or bottom quartile of overall atrophy), patients with each syndrome showed both common and variant?specific atrophy. Common atrophy across variants was found in temporoparietal regions that comprise the posterior default mode network (DMN). Early syndrome?specific atrophy mirrored functional brain networks underlying functions that are uniquely affected in each variant: Language network in lvPPA, posterior cingulate cortex?hippocampal circuit in amnestic EOAD and LOAD, and visual networks in PCA. At more advanced stages, atrophy patterns largely converged across AD variants. These findings support a model in which neurodegeneration selectively targets both the DMN and syndrome?specific vulnerable networks at the earliest clinical stages of AD. Hum Brain Mapp 36:4421?4437, 2015. © 2015 Wiley Periodicals, Inc. äAtrophy patterns in early clinical stages across distinct phenotypes o(epmc).pdf DeepDyve Pubget Overpricing