This is a really heroic experiment recording associative learning neurons in the fly brain over two hours while two flies interact with one another. This device and this approach can generally enable many more kinds of social interaction experiments
We recorded the activity of neurons within this network during 2 hours of social interactions. Interestingly, as the animals became more sociable the baseline and locomotor-related activity greatly diminished in MBONs previously implicated in aversive learning.