Site-directed optogenetic activation (using Crei\ChR2Scer\UAS.cSa with blue light) of Scer\GAL4GMR52A06 neurons induces significant grooming behavior compared to control flies; light directed to the posterior dorsal body surface elicits wing grooming whereas illumination of the anterior dorsal surface elicits notum grooming.
Optogenetic activation (using Cnoc\ChR1Cs.IVS.20xUAS.Venus with red light) of Scer\GAL4GMR52A06 neurons across the body induces significant grooming behavior; flies groom their heads at the onset of a five-second red light stimulus and then transition to groom their posterior bodies during the period after the light is turned off. Even when these flies are engaged in posterior grooming, delivery of the next red light stimulus causes flies to switch to head grooming. In decapitated flies, red-light activation of Scer\GAL4GMR52A06 neurons directly elicits immediate posterior grooming behavior.