He conducted many anatomical studies on animals , most famously an ox , to study the transition from vital to psychic pneuma .
Galen placed the vital pneuma in the heart and the psychic pneuma within the brain .
Galen conducted many anatomical studies on animals , most famously an ox , to study the transition from vital to psychic pneuma .
Galen placed the vital pneuma in the heart and the psychic pneuma within the brain .