Figure 5.

A REM sleep-like episode triggered after clonidine was injected into the A5 regions bilaterally and then into the right LC. The injection marker shows the LC injection only. Trace labels and figure format are the same as for Figure 3. Note the similarity of the changes elicited here by clonidine to those elicited by carbachol and illustrated in Figure 3. The power spectra for the control period and the period centered on the peak of the response are shown with open and filled circles, respectively.