Pre-treatment with exogenous dopamine restores normal locomotion to <i>cat-2</i> but not <i>dop-3</i> or <i>goa-1</i> mutants.

<p>The average (A) standard deviations of speed measurements within individual tracks, (B) magnitude (root mean square) of accelerations, and (C) acceleration peaks for animals on a bacterial lawn. The average (D) standard deviations of speed measurements within individual tracks, (E) magnitude (root mean square) of accelerations, and (F) acceleration peaks for DA pre-treated animals on a bacterial lawn. p-values for differences between dopamine-treated and untreated animals of the same genotype were calculated using two-way ANOVA. Tracks were first grouped by average speed. Each bin is 0.03 mm/sec wide. Error bars, SEMs. (wild-type n = 120 no dopamine, 131 DA pretreated animal tracks; <i>cat-2(n4547)</i> n = 107, 139; <i>dop-3(vs106)</i> n = 122, 128; <i>goa-1(n1134)</i> n = 162, 150; all tracks >30 sec)