PMCH and Cataplexy: In contrast to the amygdala GABAergic neurons that displayed abnormal hyperactivity and increased activated cell numbers during the pre-cataplexy episodes that were followed by the coyote urine-induced cataplexy (Sun et al., 2019), neither hyperactivity nor recruitment of more REM-ON MCH cells has been found in these pre-cataplexy MCH neuron activations.