(A) The temporal plots for the induction of abnormal involuntary movements in unilaterally lesioned rats is shown. Summation of total AIM scores (n = 6) were determined at 10 minute intervals starting at t = 5 minutes. SKF 81297 was administered s.c. at the following doses: a) 0.5 mg/kg (●), b) 0.25 mg/kg (▲), c) 0.125 mg/kg (■) and d) 0.0625 mg/kg (○). (B) The effect of PG01037 (10 mg/kg, i.p.) on SKF 81297 (0.1 mg/kg, s.c.) on the total AIMs (tAIMs), AIMs minus locomotor activity (AIMs-loco) and locomotor activity (Loco) scores is shown. PG01037 or vehicle was administered 10 minutes prior to the administration of SKF 81297. The data are the normalized mean values ± S.E.M. for n = 9 animals. The normalized mean scores for each is as follows: a) total AIMs, 84.7 ± 7.3; b) AIMs-locomotor, 84.2 ± 7.0; c) locomotor score, 86.4 ± 9.0. The significance level for each of these scores compared to the vehicle control (control) is p ≥ 0.09.