FIGURE 3.

Learning to turn toward sucrose is independent of track geometry but dependent upon an informative operant contingency. (A) Schematic of hallway geometry with representative fly for scale (Top), Fraction of flies with each rest phenotype (Bottom). (B,F) Mean turn direction Preference Index (PI) for each training block for trained (B) and yoked control (F) flies in the curved floor Y-Maze. Points plotted in color are flies with early rest (drowsy), points plotted in gray are flies with low rest (restless). (C,G) Probability Distribution Function (P.D.F.) histograms of change in turn preference index (ΔPI) between training block #1 and #7 for trained (C) and yoked control (G) flies. Drowsy flies are plotted in color (cyan: trained, green: yoked), restless flies are plotted in gray. (D,H) Mean ΔPI of low rest (restless) and early rest (drowsy) flies trained in curved floor Y-Maze (D), and yoked control flies (H). Error bars are standard error of the mean, n.s.: groups are not significantly greater than zero, * groups are significantly greater than zero.