Fig. 6.

Relationship between preceding stimulus location and post-stimulus velocity for gentle touch in WT worms (a) and harsh touch in mec-4 worms (b). Responses are grouped into three bins by body coordinate of the current touch (0 = head, 1 = tail) and colored by the location of the preceding touch (green = previous touch to the anterior half, red = previous touch to the posterior half). 95% CI of the mean is shown for each bin. Pale dots show responses of individual animals. The asterisk denotes a significant difference between the two groups in the location bin (two-tailed t-test, p = 0.0315 after Bonferroni correction).