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Titolo:
Cortical tuning: a function of anticipated stimulus intensity
Autore:
Backer, M; Knecht, S; Deppe, M; Lohmann, H; Ringelstein, EB; Henningsen, H;
Indirizzi:
Univ Munster, Dept Neurol, D-48149 Munster, Germany Univ Munster MunsterGermany D-48149 pt Neurol, D-48149 Munster, Germany
Titolo Testata:
NEUROREPORT
fascicolo: 2, volume: 10, anno: 1999,
pagine: 293 - 296
SICI:
0959-4965(19990205)10:2<293:CTAFOA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; ATTENTION; STIMULATION; POTENTIALS; TASKS;
Keywords:
cortical tuning; functional imaging; functional transcranial Doppler sonography; fTCD; stimulus anticipation; tactile;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Knecht, S Univnyunster, Dept Neurol, Albert Schweitzer Str 33, D-48149 Munster, Germa Univ Munster Albert Schweitzer Str 33 Munster Germany D-48149 a
Citazione:
M. Backer et al., "Cortical tuning: a function of anticipated stimulus intensity", NEUROREPORT, 10(2), 1999, pp. 293-296

Abstract

WE investigated the activation of the brain during anticipation of tactilestimuli by continuous cerebral blood flow velocity (CBFV) monitoring with bilateral transcranial Doppler sonography. A forced choice paradigm was performed where a first group of subjects (n=16) was expecting suprathreshold and a second group (n=19) was anticipating threshold tactile stimuli to theindex finger after a cueing tone. During the anticipation of suprathreshold stimuli the CBFV always exhibited a significantly stronger increase in the right hemisphere than in the left, even when stimuli were anticipated at the right index finger. Conversely when stimuli at perception threshold were expected, the respective contralateral hemisphere showed a significantly stronger perfusion increase. These data show that preparatory activation ofthe brain during stimulus anticipation is dependant on the expected stimulus intensity. (C) 1999 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 11:36:34