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Titolo:
Abnormal semantic network for "animals" but not "tools" in patients with Alzheimer's disease
Autore:
Chan, AS; Salmon, DP; De la Pena, J;
Indirizzi:
Chinese Univ Hong Kong, Dept Psychol, Hong Kong, Hong Kong, Peoples R China Chinese Univ Hong Kong Hong Kong Hong Kong Peoples R China oples R China Univ Calif San Diego, Dept Neurosci, San Diego, CA 92103 USA Univ Calif San Diego San Diego CA USA 92103 osci, San Diego, CA 92103 USA San Diego Dept Vet Affairs Med Ctr, Med Res Serv, San Diego, CA USA San Diego Dept Vet Affairs Med Ctr San Diego CA USA v, San Diego, CA USA
Titolo Testata:
CORTEX
fascicolo: 2, volume: 37, anno: 2001,
pagine: 197 - 217
SICI:
0010-9452(200104)37:2<197:ASNF"B>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEMORY IMPAIRMENT; DOUBLE DISSOCIATION; RECOGNITION MEMORY; KNOWLEDGE; CATEGORIES; COMPREHENSION; DEMENTIA; SYSTEMS; THINGS; VERIFICATION;
Keywords:
Alzheimer's disease; semantic memory; category specific deficits;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Chan, AS Chinese Univ Hong Kong, Dept Psychol, Hong Kong, Hong Kong, Peoples R China Chinese Univ Hong Kong Hong Kong Hong Kong Peoples R China hina
Citazione:
A.S. Chan et al., "Abnormal semantic network for "animals" but not "tools" in patients with Alzheimer's disease", CORTEX, 37(2), 2001, pp. 197-217

Abstract

The effects of Alzheimer's disease (AD) on the organization of semantic knowledge (i.e., thr: semantic network) for living (e.g., animals) and non-living (e.g., tools) categories was examined. Multidimensional scaling and Pathfinder analyses of data from triadic comparison tasks showed that the semantic network for "animals", but not the network for "tools", was abnormal in patients with AD. Specifically, patients with AD tended to use a different primary dimension than control subjects for categorizing animals and their network was characterized by atypical associations between concepts. Thedifferences in the integrity of the AD patients' networks for "animals" and "tools" was not likely to be an artifact of differences in the difficultyin identifying the stimuli in the two categories as all stimuli were identified on simple naming or matching tasks. These findings support the results of previous studies that have shown the presence of category-specific semantic deficits in patients with AD.

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Documento generato il 25/11/20 alle ore 07:20:06