title: The abbreviated vigilance task and cerebral hemodynamics.
abstract: Transcranial Doppler sonography (TCD) and transcranial cerebral oximetry (TCCO) measures of cerebral blood flow velocity and oxygenation levels were collected during an abbreviated 12-min vigilance task. Both the TCD and TCCO measures showed higher levels of cerebral vascular activity in the right than in the left cerebral hemisphere; the cerebral laterality of vigilance occurs in an abbreviated task. Although there was a significant decline in performance over time, there was no significant change in the physiological measures over time during the abbreviated vigil. This latter finding does not match the physiological changes detected in long-duration vigils.
authors.affiliation: Michigan Technological University, Houghton, MI 49931, USA. Deak_Helton@yahoo.com
authors.forename: William S
authors.initials: WS
authors.lastname: Helton
authors.forename: Todd D
authors.initials: TD
authors.lastname: Hollander
authors.forename: Joel S
authors.initials: JS
authors.lastname: Warm
authors.forename: Lloyd D
authors.initials: LD
authors.lastname: Tripp
authors.forename: Kelley
authors.initials: K
authors.lastname: Parsons
authors.forename: Gerald
authors.initials: G
authors.lastname: Matthews
authors.forename: William N
authors.initials: WN
authors.lastname: Dember
authors.forename: Raja
authors.initials: R
authors.lastname: Parasuraman
authors.forename: Peter A
authors.initials: PA
authors.lastname: Hancock
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001143:Arousal / Q000502:physiology*; D001921:Brain / Q000378:metabolism*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010092:Oximetry / Q000379:methods; D010100:Oxygen / Q000097:blood* / Q000378:metabolism; D011930:Reaction Time / Q000502:physiology; D013647:Task Performance and Analysis; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods
chemical_list: D010100:Oxygen