Complex sentence: In 1824 he graduated from the course in the first place, and the academic conference gave him a gold medal, he then left for the post of Associate Professor of Physiology and Pathology and in 1825 he was chosen among 4 doctors to be sent abroad.
Split into simpler sentences: In 1824 he graduated from the course in the first place, and the academic conference gave him a gold medal. Pelehin left for the post of Associate Professor of Physiology and Pathology and in 1825 he was chosen among 4 doctors to be sent abroad.