Figure 6. Maturation of optomotor response in early adulthood.

a) Adult flies at various ages post eclosion were presented with 5-second, high-contrast, rotating sinusoidal gratings as in Fig 2b. As the flies aged from 1 day post eclosion (dpe) to 2, 4, and 8 dpe, the initial anti-directional turning response transitioned into syn-directional turning. Dark-rearing flies at 2 dpe reduced this maturation effect. Shaded patches represent ±1 SEM. N = 5–14 flies.

b) The last 1.5 seconds of the mean turning velocity of each fly was averaged, and the population response was plotted.

c) As in (a) but in the TRC lab, using 0.5, 1, 2, and 4 dpe, with dark rearing for 4 dpe. With maturation, the syn-directional turning became less transient. N = 9–15 flies.

d) As in (b) but for data in (c).