Figure 2.

Behavioral arrests triggered by CeA activation are cataplexy. A, B, In 5 orexin^−/− mice, activation of all CeA cells produced behavioral arrests characterized by similar levels of muscle tone in the masseter and neck muscles compared with typical baseline (i.e., saline) cataplexy. C, These arrests also had similar EEG spectral profiles to baseline (i.e., saline) cataplexy (data presented as mean ± SEM). D, CeA activation did not produce any changes in the overall amount of wakefulness (W), NREM sleep, or REM sleep, nor did it alter sleep attacks (inset).