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Titolo:
Restriction of task processing time affects cortical activity during processing of a cognitive task: an event-related slow cortical potential study
Autore:
Lamm, C; Bauer, H; Vitouch, O; Durec, S; Gronister, R; Gstattner, R;
Indirizzi:
Univ Vienna, Dept Psychol, Brain Res Lab, A-1010 Vienna, Austria Univ Vienna Vienna Austria A-1010 Brain Res Lab, A-1010 Vienna, Austria
Titolo Testata:
COGNITIVE BRAIN RESEARCH
fascicolo: 3, volume: 10, anno: 2001,
pagine: 275 - 282
SICI:
0926-6410(200101)10:3<275:ROTPTA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
MENTAL ROTATION; ACTIVATION; PRESSURE;
Keywords:
experimental design; task processing; individual differences; slow cortical potentials; functional neuroimaging; visuo-spatial imagery;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Lamm, C Univ Vienna, Dept Psychol, Brain Res Lab, Liebiggasse 5, A-1010 Vienna, Austria Univ Vienna Liebiggasse 5 Vienna Austria A-1010 0 Vienna, Austria
Citazione:
C. Lamm et al., "Restriction of task processing time affects cortical activity during processing of a cognitive task: an event-related slow cortical potential study", COGN BRAIN, 10(3), 2001, pp. 275-282

Abstract

As is known from psychometrics. restriction of task processing time by theinstruction to respond as quickly and accurately as possible leads to task-unspecific cognitive processing, Since this task processing mode is used in most functional neuroimaging studies of human cognition, this may evoke cortical activity that is functionally not essential for the particular taskunder investigation. Using topographic recordings of event-related slow cortical potentials, two experiments have been performed to investigate whether cortical activity during processing of a visuo-spatial imagery task is substantially influenced by the time provided to process the task. Furthermore, it was investigated whether this effect is additionally modulated by a subject's task-specific ability. The instruction to respond as quickly and accurately as possible led to increased negative slow cortical potential amplitudes over parietal and frontal regions and significantly interacted with task-specific ability. While cortical activity recorded over parietal andfrontal regions was different between subjects with low and high spatial ability when processing time was unrestricted, no such differences were found between ability groups when subjects were instructed to answer both quickly and accurately. These results suggest that restricting processing time has considerable effects on the amount and the pattern of brain activity during cognitive processing and should be taken into account more explicitly in the experimental design and interpretation of neuroimaging studies of cognition, (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/20 alle ore 03:52:50