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Titolo:
On the functional neuroanatomy of intrinsic and phasic alertness
Autore:
Sturm, W; Willmes, K;
Indirizzi:
Univ Hosp RWTH Aachen, Neurol Clin, Dept Neurol Neuropsychol, D-52074 Aachen, Germany Univ Hosp RWTH Aachen Aachen Germany D-52074 ol, D-52074 Aachen, Germany
Titolo Testata:
NEUROIMAGE
fascicolo: 1, volume: 14, anno: 2001,
parte:, 2 supplemento:, S
pagine: S76 - S84
SICI:
1053-8119(200107)14:1<S76:OTFNOI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMISPHERIC CEREBRAL INFARCTION; ANTERIOR CINGULATE CORTEX; SIMPLE REACTION-TIME; SUSTAINED ATTENTION; VIGILANCE; ACTIVATION; AROUSAL; LOCALIZATION; PERFORMANCE; DOMINANCE;
Keywords:
alertness; sustained attention; vigilance; attention; PET; fMRI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Sturm, W Univ Hosp RWTH Aachen, Neurol Clin, Dept Neurol Neuropsychol, Pauwelsstr 30, D-52074 Aachen, Germany Univ Hosp RWTH Aachen Pauwelsstr 30 Aachen Germany D-52074 rmany
Citazione:
W. Sturm e K. Willmes, "On the functional neuroanatomy of intrinsic and phasic alertness", NEUROIMAGE, 14(1), 2001, pp. S76-S84

Abstract

Intrinsic and phasic alertness are the most basic aspects of attention intensity probably constituting the basis for the more complex and capacity-demanding aspects of attention selectivity. Intrinsic alertness represents the cognitive control of wakefulness and arousal and is typically assessed bysimple reaction time tasks without a preceding warning stimulus. Phasic alertness, in contrast, is called for in reaction time tasks in which a warning stimulus precedes the target, and it represents the ability to increase response readiness subsequent to external cueing, We report PET and fMRI data from both the literature and our own experiments to delineate the cortical and subcortical networks subserving alertness, sustained attention (as another aspect of attention intensity), and spatial orienting of attention. Irrespective of stimulus modality, there seems to exist a mostly right-hemispheric frontal, parietal, thalamic, and brain-stem network which is coactivated by alerting and orienting attentional demands. These findings corroborate both the hypothesis of a frontal modulation of brain-stem activation probably via the reticular nucleus of the thalamus and of a coactivation of the posterior attention system, involved in spatial orienting by the anterior alerting network. Under conditions of phasic alertness there are additional activations of left-hemisphere frontal and parietal structures which are interpreted as basal aspects of attention selectivity rather than additional features of alerting. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 22:04:45