“…A consistent finding in vigilance research is that sustained attention evokes right-hemisphere lateralization in the brain in right handed individuals. Specifically, blood flow and blood oxygenation is elevated in the right hemisphere compared to the left hemisphere during vigilance, an outcome which has been found using functional magnetic resonance imaging (fMRI), positron emission tomography (PET), transcranial Doppler sonography (TCD), and functional near-infrared spectroscopy (fNIRS; Berman & Weinberger, 1990;Buchsbaum et al, 1990;Cohen et al, 1988;Helton et al, 2007;Hitchcock et al, 2003;Lewin et al, 1996;Parasuraman, Warm & See, 1998;Shaw et al, 2009;Stroobant & Vingerhoets, 2000;; see Helton et al, 2010 andWarm et al, 2012 for overview). Moreover, research with commissurotomized (split-brain) patients demonstrates improved performance during vigilance tasks when signals are presented to the right hemisphere as opposed to the left hemisphere (Diamond, 1979a;1979b).…”