Fig. 2

Breath duration quantified prior to 5-HT infusion before (baseline; N = 30) and after ICV injections of various concentrations of dronabinol (100, 10, 1 or 0.1 μg; N = 6 for each dose) or vehicle (DMSO; N = 6). There were no significantly (p = 0.12) differences in breath duration in the treatment groups. Data (mean ± SEM) were analyzed using mixed model analysis with a repeated/fixed measure (ICV treatment)