Fig. 1.

Behavioral test results in the three experimental groups. The Figure displays the total number of rotations during one hour after apomorphine injection in a week, before and four weeks after surgery. There were no significant differences between the control and experimental groups regarding the number of rotations induced during four weeks after surgery and a week before it. In the lesion group (unilateral stereotaxic injection of 5 µl neurotoxin solution containing 2.5 μg/kg of 6-hydroxydopamine i.e. 6-OHDA, dissolved in 0.9% normal saline with 0.2 mg/ml of ascorbic acidinto the left striatum), the number of the contralateral rotations indicated a significant difference between four weeks after and one week before surgery (^* p < 0001).