Sentence Processing in Lewy Body Spectrum Disorder: The Role of Working Memory

Autor/inn/en	Gross, Rachel G.; McMillan, Corey T.; Chandrasekaran, Keerthi; Dreyfuss, Michael; Ash, Sharon; Avants, Brian; Cook, Philip; Moore, Peachie; Libon, David J.; Siderowf, Andrew; Grossman, Murray
Titel	Sentence Processing in Lewy Body Spectrum Disorder: The Role of Working Memory
Quelle	In: Brain and Cognition, 78 (2012) 2, S.85-93 (9 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0278-2626
DOI	10.1016/j.bandc.2011.12.004
Schlagwörter	Sentences; Grammar; Dementia; Diseases; Patients; Short Term Memory; Language Processing; Investigations; Task Analysis; Brain Hemisphere Functions; Regression (Statistics) + Suchen Sie Ihr Suchwort? Sentence analysis; Satzanalyse; Grammatik; Demenz; Disease; Krankheit; Patient; Kurzzeitgedächtnis; Sprachverarbeitung; Untersuchung; Aufgabenanalyse; Regression; Regressionsanalyse
Abstract	Prior work has related sentence processing to executive deficits in non-demented patients with Parkinson's disease (PD). We extended this investigation to patients with dementia with Lewy bodies (DLB) and PD dementia (PDD) by examining grammatical and working memory components of sentence processing in the full range of patients with Lewy body spectrum disorder (LBSD). Thirty-three patients with LBSD were given a two-alternative, forced-choice sentence-picture matching task. Sentence type, working memory, and grammatical structure were systematically manipulated in the sentences. We found that patients with PDD and DLB were significantly impaired relative to non-demented PD patients and healthy controls. The deficit in PDD/DLB was most pronounced for sentences lengthened by the strategic placement of an additional prepositional phrase and for sentences with an additional proposition due to a center-embedded clause. However, there was no effect for subject-relative versus object-relative grammatical structure. An MRI voxel-based morphometry analysis in a subset of patients showed significant gray matter thinning in the frontal lobe bilaterally, and this extended to temporal, parietal and occipital regions. A regression analysis related sentence processing difficulty in LBSD to frontal neocortex, including inferior prefrontal, premotor, and dorsolateral prefrontal regions, as well as right superior temporal cortex. These findings are consistent with the hypothesis that patients with PDD and DLB have difficulty processing sentences with increased working memory demands and that this deficit is related in part to their frontal disease. (Contains 2 figures and 5 tables.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10