"Optogenetic activation" refers to a method that uses light to control the activity of certain cells in the brain or other living organisms. Full definition
This image shows a male fly being exposed to red light to trigger optogenetic activation of CRZ neurons, which causes ejaculation. (sciencedaily.com)
Direct optogenetic activation of phasic and tonic action - potential firing of NR neurons during memory acquisition enhanced or reduced memory generalization, respectively. (science.sciencemag.org)
To find out whether ejaculation produced an immediate pleasurable response, the researchers used an arena in which one side emitted a red light to trigger optogenetic activation of CRZ neurons and tracked where male flies chose to spend their time. (sciencedaily.com)