Key result
An abbreviated 12-minute vigilance task elicited higher cerebral vascular activity in the right hemisphere compared to the left, with no significant change in physiological measures over time.
Observational
An abbreviated 12-minute vigilance task demonstrates right-hemisphere cerebral laterality but lacks the progressive physiological changes seen in long-duration vigils.
Right-hemisphere laterality emerges in brief vigilance; leaves open whether short tasks model sustained attention decrements clinically.
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.
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Helton et al. (2007) reported an observational. Abbreviated 12-min vigilance task was evaluated on Cerebral blood flow velocity and oxygenation levels. An abbreviated 12-minute vigilance task elicited higher cerebral vascular activity in the right hemisphere compared to the left, with no significant change in physiological measures over time.
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