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Titolo:
Inhibition of return in aging and Alzheimer's disease: Performance as a function of task demands and stimulus timing
Autore:
Langley, LK; Fuentes, LJ; Hochhalter, AK; Brandt, J; Overmier, JB;
Indirizzi:
Univ Minnesota, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 nesota, Minneapolis, MN 55455 USA Johns Hopkins Univ, Sch Med, Baltimore, MD USA Johns Hopkins Univ Baltimore MD USA ins Univ, Sch Med, Baltimore, MD USA
Titolo Testata:
JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY
fascicolo: 4, volume: 23, anno: 2001,
pagine: 431 - 446
SICI:
1380-3395(200108)23:4<431:IORIAA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUOSPATIAL ATTENTION; DISCRIMINATION TASKS; VISUAL-ATTENTION; REACTION-TIME; OLDER ADULTS; NEURAL BASIS; DEMENTIA; INFORMATION; SCHIZOPHRENIA; DISSOCIATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Clinical Medicine
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Langley, LK Duke Univ, Med Ctr, Box 980, Durham, NC 27710 USA Duke Univ Box 980 Durham NC USA 27710 80, Durham, NC 27710 USA
Citazione:
L.K. Langley et al., "Inhibition of return in aging and Alzheimer's disease: Performance as a function of task demands and stimulus timing", J CL EXP N, 23(4), 2001, pp. 431-446

Abstract

Inhibition of return (IOR) is a phenomenon of spatial attention that biases attention toward novel events in the environment. Recent evidence suggests that the magnitude and timing of IOR varies as a function of task conditions (e.g., detection vs. discrimination tasks, short vs. long cue-tar.-et intervals, intrinsic vs. extrinsic cues). Although IOR appears relatively preserved with both normal aging and Alzheimer's disease (AD), it has been tested under relatively simple task conditions. To test whether IOR is resistant to age and/or AD when cognitive demands are increased, we employed a double-cue IOR paradigm that required categorization as well as detection responses. The stimulus onset asynchrony (SOA) between the cue and target events was varied to determine whether group differences existed in IOR effectsover time. Younger normal adults and older normal adults exhibited significant IOR effects on both the detection task and the categorization task at a short cue-target SOA (950 ms). In contrast, AD patients exhibited significant IOR effects at the short SOA on the detection task but not on the categorization task. From the short to the long SOA (3500 ms), IOR effects exhibited by younger normal adults declined significantly during both the detection and the categorization tasks, suggesting that inhibition resolved overtime. In contrast, neither older normal adults nor AD patients exhibited SOA-related IOR reductions on the detection task. These results suggest thatIOR may show differential age- and AD-related vulnerabilities depending ontask conditions and timing characteristics.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 04:14:16