It has long been known for sure that the sight of tasty food makes a hungry man's mouth water; also lack of appetite has always been regarded as an undesirable phenomenon, from which one might conclude that appetite is essentially linked with the process of digestion.

He noticed that the dogs tended to salivate before food was actually delivered to their mouths and set out to investigate this "psychic secretion" as he called it. Pavlov's mother Varvara Ivanovna Uspenskaya (1826–1890) was a devoted homemaker. Pavlov’s laboratory housed a full-scale kennel for the experimental animals.

Ivan Pavlov devoted his life to the study of physiology and sciences making several remarkable discoveries and ideas that were passed on from generation to generation. From his childhood days Pavlov demonstrated intellectual brilliance along with an unusual energy which he named "the instinct for research". S.