Figure 1.

The correlation of rCBF and the change-of-thirst score derived from 99 PET scans from 10 subjects during the experimental sequence. The sections are at x = −8, x = −2, and x = + 2 and show activations (red-yellow) and deactivations (blue-green). The color coding of Z scores is shown in the figure. The bilateral posterior cingulate activations are evident.