Neural correlates of the emergence of consciousness of thirst.
Proceedings of the National Academy of Sciences of the United States of America December 9, 2003 Gary F. Egan, Tim Silk, Frank Zamarripa et al.
Thirst was induced by rapid i.v. infusion of hypertonic saline (0.51 M at 13.4 ml/min). Ten humans were neuroimaged by positron-emission tomography (PET) and four by functional MRI (fMRI). PET images were made 25 min after beginning infusion, when the sensation of thirst began to enter the stream of consciousness. The fMRI images were made when the maximum rate of increase of thirst occurred....