Ivan Mikhaylovich Sechenov was a Russian psychologist, physiologist, and medical scientist.
Portrait by Ilya Repin (1889)
Ivan Sechenov in his youth
Soviet 1956 commemorative stamp of Ivan Sechenov
Ivan Petrovich Pavlov was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs.
Pavlov in 1890
The Pavlov Memorial Museum in Ryazan, Pavlov's former home, built in the early 19th century
Pavlov and his future wife, Seraphima Vasilievna, in 1880
A 1935 portrait of Pavlov by Mikhail Nesterov