“…In mammals, brain circuits are thought to compute adaptive neural functions that underlie action-selection (or ‘decision-making’), while spinal circuits communicate bidirectionally with the brain, such that descending pathways activate motor programs and ascending pathways report on their execution (Arber, 2012). This organizing principle also exists in the fly: male-specific ‘decision-making’ neurons in the brain (e.g., P1; pC2I; dopaminergic neurons) integrate multimodal sensory cues to initiate and modulate courtship and copulatory behaviors (Kimura et al, 2008; Yu et al, 2010; Kohatsu et al, 2011; von Philipsborn et al, 2011; Pan et al, 2012; Inagaki et al, 2014; Kohatsu and Yamamoto, 2015; Zhang et al, 2016), while descending ‘command’ neurons (e.g., pIP10) relay information from the ‘decision-making’ neurons, to activate ‘pattern generator’-like motor circuits in the VNC (Clyne and Miesenbock, 2008; von Philipsborn et al, 2011; Inagaki et al, 2014). …”