1928: Keeping the Disembodied Dog Head Alive
In 1940 a film was released showing Sergei Brukhonenko, a Russian scientist, keeping a disembodied dog head alive using a machine called autojector.
Sergei invented the machine in 1925 and the experiment was filmed in 1928, only to be released later.
The machine maintained the blood circulation through the head while the rest of the body was under intensive surgery.
The film showed how the separate head responded to various stimuli like light, sound, etc. The disembodied head was finally fed a piece of cheese that went through the esophageal tube. No one ever independently verified the experiment.