Intra-DH injection of 5-HT6 antagonist enhanced the memory functions in sham rats.
Both 5-HT6 agonist and antagonist enhanced the memory functions in parkinsonian rats.
5-HT6 antagonist increased DA and NA levels in several brain regions in sham rats.
5-HT6 agonist and antagonist changed DA and NA levels in parkinsonian rats.
5-HT6 agonist and antagonist did not change 5-HT levels in sham and parkinsonian rats.