Ryszard Przewłocki (born October 25, 1943) is a Polish neurobiologist and neuropharmacologist, professor of medical sciences, professor at the Institute of Pharmacology of the Polish Academy of Sciences, member of the Polish Academy of Sciences, Polish Academy of Learning and Academia Europaea, and one of the most frequently cited Polish scientists in the field of biomedicine after 1965, who in his youth was also an actor of experimental theatre Teatr 38 in Kraków, and episodically a film actor. Biography In 1962, he passed matura in the Bartłomiej Nowodworski High School. Then he studied automation at the Electrical Department of the AGH University of Science and Technology in Kraków (1962–1967) and psychology at the Jagiellonian University (1966–1970). During his studies he was an actor at Teatr 38, Kraków's experimental theater. He made a theatre debut in 1963 in the performance 23 typescript pages. The performance received the first prize at the Festival of Amateur Poetry Theaters in Poznań, where Julian Przyboś was the chairman of the jury. Later, Przewłocki appeared in plays such as the cowboy-style adaptation of An Ancient Tale in the staging of Mieczysław Święcicki based on the libretto by Aleksander Bandrowski. He played the main roles in the plays directed by Helmut Kajzar: King Richard III in Shakespeare's Richard III and Nathan in The Judges of Stanisław Wyspiański. In addition, he played in the adaptation of Günter Grass's Cat and Mouse directed by Jan Güntner, as well as in Falling and The Book of Job directed by Bogusław Hussakowski. With the ensemble of Teatr 38 he took part in many theater festivals, performing among others in Nancy and Zagreb, Parma, Erlangen and touring in many Spanish cities. In 1969, he appeared in the short film of Julian Antoniszczak In the Clutches of Sex (W szponach seksu). After many years, he returned to acting – he played the television presenter in the etudes Hydrophobia (2013) and Ad maiorem pastae gloriam (2017) directed by Franciszek Vetulani. In 1969 he started working at the then Department of Pharmacology of the Polish Academy of Sciences, in the Laboratory of Neuropharmacology. There, in 1975, after transforming the Department into an independent Institute, he obtained Ph.D. in the field of natural sciences and assumed the position of a senior assistant. In the years 1977–1979 he obtained a Max-Planck scholarship and completed a post-doctoral internship at the Max Planck Institute of Psychiatry in Munich. He