Figure 4.

Sitting. (A) Duration (s) and (B) frequency (n) after vehicle (0.9% saline), 5 mg/kg L-DOPA and 10 mg/kg L-DOPA. The figure shows box and whisker plots of median sitting durations during the whole time of testing (gray shade) and in the individual 5-min time bins. 25-/75-percentiles are given in the boxes, while 25-/95-percentiles are represented by the whiskers. The circles represent the individual animals. For significant between-group differences the respective p values are given (two-tailed Mann–Whitney U test, α = 0.0167 after Bonferroni correction). Insets: T-b curves obtained by plotting median values of sitting durations (A) and sitting frequencies (B) against time. Linear functions (y = ax + b with a, slope and b, y-intercept) were fitted to the plots of sitting durations, whereas quadrtatic functions (y = a + bx + cx² with a, absolute term; bx, linear term; cx², quadratic term) were fitted to the plots of sitting frequencies. For the comparisons between treatment groups (two-tailed F test, α = 0.0167 after Bonferroni correction) the respective p values are given.