... the dolphins would have ordinarily been resting or asleep. * Author for correspondence (e-mail: [email protected] ) 26 6 2006 © The Company of Biologists Limited 2006 2006 dolphin Tursiops vigilance diurnal rhythm brain unihemispheric sleep hemisphere autonomy It has...

..., allowing for the exploration of potential mechanisms of unihemispheric sleep. Diazepam has been shown to induce unihemispheric slow waves (USW), therefore we used functional imaging of dolphins with and without diazepam to observe hemispheric differences in brain metabolism and blood flow. MRIs were used...