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Titolo:
Different underlying mechanisms for deficits in concept formation in dementia
Autore:
Giovannetti, T; Lamar, M; Cloud, BS; Swenson, R; Fein, D; Kaplan, E; Libon, DJ;
Indirizzi:
Crozer Chester Med Ctr, Neuropsychol Serv, Chester, PA 19013 USA Crozer Chester Med Ctr Chester PA USA 19013 l Serv, Chester, PA 19013 USA Drexel Univ, Neuropsychol Program, Philadelphia, PA USA Drexel Univ Philadelphia PA USA uropsychol Program, Philadelphia, PA USA Thomas Jefferson Univ Hosp, Dept Neurol, Philadelphia, PA 19107 USA ThomasJefferson Univ Hosp Philadelphia PA USA 19107 elphia, PA 19107 USA Merit Care Neurosci Ctr, Fargo, ND USA Merit Care Neurosci Ctr Fargo ND USA it Care Neurosci Ctr, Fargo, ND USA Univ Connecticut, Dept Psychol, Storrs, CT USA Univ Connecticut Storrs CTUSA Connecticut, Dept Psychol, Storrs, CT USA Boston Univ, Med Ctr, Dept Neurol, Boston, MA USA Boston Univ Boston MA USA ton Univ, Med Ctr, Dept Neurol, Boston, MA USA Boston Univ, Med Ctr, Dept Psychiat, Boston, MA USA Boston Univ Boston MAUSA n Univ, Med Ctr, Dept Psychiat, Boston, MA USA Suffolk Univ, Dept Psychiat, Boston, MA 02114 USA Suffolk Univ Boston MA USA 02114 niv, Dept Psychiat, Boston, MA 02114 USA Med Coll Penn & Hahnemann Univ, Dept Psychiat, Philadelphia, PA USA Med Coll Penn & Hahnemann Univ Philadelphia PA USA Philadelphia, PA USA
Titolo Testata:
ARCHIVES OF CLINICAL NEUROPSYCHOLOGY
fascicolo: 6, volume: 16, anno: 2001,
pagine: 547 - 560
SICI:
0887-6177(200108)16:6<547:DUMFDI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROGRESSIVE SUPRANUCLEAR PALSY; ISCHEMIC VASCULAR DEMENTIA; ALZHEIMERS-DISEASE; NEUROPSYCHOLOGICAL DEFICITS; SUBCORTICAL DEMENTIA; HUNTINGTONS-DISEASE; DIAGNOSIS; FLUENCY;
Keywords:
Alzheimer's disease; vascular dementia; concept formation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Libon, DJ Crozer Chester Med Ctr, Neuropsychol Serv, Chester, PA 19013 USACrozer Chester Med Ctr Chester PA USA 19013 ester, PA 19013 USA
Citazione:
T. Giovannetti et al., "Different underlying mechanisms for deficits in concept formation in dementia", ARCH CLIN N, 16(6), 2001, pp. 547-560

Abstract

We investigated the different mechanisms that may underlie deficits in verbal concept formation among patients with Alzheimer's disease (AD) and ischaemic vascular dementia (IVD) associated with periventricular and deep white matter alterations. Concept formation was assessed with the WAIS-R Similarities subtest (SIM). Two types of errors were re-coded from the 0-point responses as scored by the WAIS-R manual. In set errors (e.g., dog-lion "they're alive") were coded when patients reported a very vague superordinate concept for the word pair. Out of set responses (e.g., dog-lion "the lion roars and the dog barks") were coded when a response was clearly out of mentalset, i.e., when participants were unable to provide a superordinate concept for the word pair. Between-group comparisons demonstrated no difference in SIM test performance according to the scoring system described in the WAIS-R manual. Nonetheless, AD patients produced a greater proportion of in set errors, while IVD patients produced a greater proportion of out of set errors. Out of set errors were highly associated with measures of executive function, while in set errors were associated with measures related to delayed recognition memory and semantic intrusion errors. We conclude that the underlying deficits that contribute to poor concept formation differ betweenAD and IVD patients. In IVD impaired concept formation is related to deficits in the executive systems necessary to monitor responses and sustain mental set. In AD, by contrast, the deficit appears to be secondary to impaired verbal response selection. (C) 2001 National Academy of Neuropsychology. Published by Elsevier Science Ltd.

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Documento generato il 22/01/20 alle ore 09:23:23