| Figure 4. |
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| Effects of bilateral, peri-LC clonidine infusions on EEG measures in halothane-anesthetized rat. The infusions completely suppressed LC discharge activity. Power-spectrum analyses are shown for ECoG and HEEG samples from preinfusion, postinfusion, and recovery periods. A 25-sec raw EEG trace representative of the entire 8-min period from which the PSA was computed is shown above each power spectrum. The most striking postinfusion changes in the ECoG are the increase in power of the slowest frequencies, and those in the HEEG are the appearance of mixed-frequency activity. Shading indicates the theta frequency band (2.3–6.9 Hz) in the HEEG power spectra. (From ref. 16.) |
published 2000