Fig. 2 | Nature Communications

Fig. 2

From: Speed dependent descending control of freezing behavior in Drosophila melanogaster

Fig. 2

Flies freeze upon looming stimulation. a Speed raster for a random subset of 50 flies ordered by average speed during stimulation (ascending). Each row corresponds to one fly and each vertical line to 500 ms bins. Bar on top indicates the 5 min stimulation period. Color bar values refer to mm s−1. b Proportion of freezing flies (n = 300 for each condition). Dashed lines represent stimulus presentations. c Startle behavior during freezing. Average (±s.e.m.) number of pixels changing around the fly in a 1 sec window around looming stimuli, including only trials where flies were freezing before and after the stimulus (n = 1434). Dashed lines indicate looming onset and offset. Top, size of looming disk (visual angle). d Distribution of individual flies by time spent freezing during the stimulation period. e Proportion of freezing flies to a shorter stimulation (5 looming presentations, n = 100). Dashed lines represent looming presentations. f Distribution of individual flies by time spent freezing during the stimulation period for the shorter stimulation experiment. *** denotes p < 0.001