Using optogenetic approach, we have revealed roles of

Orexin neurons in fasting-induced thermoregulation (Futatsuki, 2018) and aversive emotion (Yamashita, 2021)

5HT neurons in stress-associated cardiorespiratory excitation (Ikoma, 2018)

Dopamine neurons in pain-processing (Moriya, 2018, 2019, 2020)