Figure 3

Increase of paradoxical sleep and slow wave sleep quantities by ICV administration of MCH. Administration of 0.2 μg (black line) and 1 μg (dashed line) of MCH induceda strong increase in the quantities of PS (A) and SWS (B) and a decrease in W (C) in male rats compared to NaCl (dotted line). The values are normalized to NaCl, NaCl corresponding to 100% of PS (A), SWS (B) or W (C). Significance values indicated for individual points are: 0.2 μg MCH versus NaCl ( * p < 0.05, **p < 0.01), 1 μg MCH versus NaCl (° p < 0.05, ° °p < 0.01).