Parkinson's disease: Biochemical investigation of adaptation processes in dopaminergic, serotonergic and noradrenergic structures within and outside of extrapyramidal system — A postmortem study: L. Antkiewicz-Michaluk, A. Krygowska-Wajs1, A. Szczudlik1, J. Vetulani, I. Romañska. Institute of Pharmacology, Polish Academy of Sciences, Kraków; 1Neurology Clinic, Collegium Medicum, Jagiellonian University, Kraków, Poland