On experimental day 23, apomorphine‐induced rotational behavior was used to evaluate the dopaminergic neuron lesion induced by 6‐OHDA. Apomorphine was dissolved in saline and injected subcutaneously at the dose of 0.2 mg/kg. After 5 minutes, the rotations were monitored for 30 minutes. The number of contralateral rotations (to the nonlesioned side) was recorded by examiner blinded to the groups.
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