A Functional Near-Infrared Spectroscopy Study of Sustained Attention to Local and Global Target Features

Autor/inn/en	De Joux, Neil; Russell, Paul N.; Helton, William S.
Titel	A Functional Near-Infrared Spectroscopy Study of Sustained Attention to Local and Global Target Features
Quelle	In: Brain and Cognition, 81 (2013) 3, S.370-375 (6 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0278-2626
DOI	10.1016/j.bandc.2012.12.003
Schlagwörter	Spectroscopy; Research Methodology; Reaction Time; Task Analysis; Role; Visual Discrimination; Attention Control; Brain Hemisphere Functions; Physiology; Time on Task + Suchen Sie Ihr Suchwort? Spektroskopie; Research method; Forschungsmethode; Reaktionsvermögen; Aufgabenanalyse; Rollen; Aufmerksamkeitstest; Physiologie; Zeitaufwand
Abstract	Despite a long history of vigilance research, the role of global and local feature discrimination in vigilance tasks has been relatively neglected. In this experiment participants performed a sustained attention task requiring either global or local shape stimuli discrimination. Reaction time to local feature discriminations was characterized by a quadratic trend over time-on-task with performance levels returning to initial levels late in the task. This trend did not occur in the global shape discrimination task. Functional near-infrared spectroscopy (fNIRS) was utilized in this study as an index of cerebral activation. In both tasks there was increased right hemisphere relative to left hemisphere oxygenation and right hemisphere oxygenation increased with time-on-task. Left hemisphere oxygenation, however, decreased slightly in the global task, but increased significantly in the local task as task duration increased. Indeed, total oxygenation, averaging both right and left, increased more with time-on-task in the local discrimination task. Both the performance and physiological results of this study indicate increased utilization of bilateral cerebral resources with time-on-task in the local, but not the global discrimination vigil. (Contains 5 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10