Mean of time response curves of ghrelin's effect on BOLD responses in the nucleus accumbens (A) and septum (B) after vehiculum (blue) or rimonabant pretreatment (red).

<p>Arrows mark ghrelin administration, which started at BOLD response 333 and lasted to 383 (999–1149 s). For quantifying drug effect, mean of the BOLD responses from 901 to 950 was calculated (2703–2850 s). N = 5–7.