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Ivan Petrovich Pavlov (Russian: Иван Петрович Павлов, IPA: [ɪˈvan pʲɪˈtrovʲɪtɕ ˈpavləf] ⓘ; 26 September [O.S. 14 September] 1849 – 27 February 1936) [2] was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs.
- Overview
- Life
- Laws of conditioned reflex
Ivan Pavlov gave up studying theology to enter the University of St. Petersburg, where he studied chemistry and physiology. After receiving an M.D. at the Imperial Medical Academy in St. Petersburg, he studied in Germany under the direction of the cardiovascular physiologist Carl Ludwig and the gastrointestinal physiologist Rudolf Heidenhain.
What was Ivan Pavlov best known for?
Ivan Pavlov developed an experiment testing the concept of the conditioned reflex. He trained a hungry dog to salivate at the sound of a metronome or buzzer, which was previously associated with the sight of food. He later developed an approach that emphasized the importance of conditioning in studies relating human behaviour to the nervous system.
What were Ivan Pavlov’s contributions?
In addition to his conditioning work, Ivan Pavlov devised an operation to prepare a miniature stomach, which was isolated from ingested foods but retained its vagal nerve supply. The procedure allowed him to study the gastrointestinal secretions in animals. For his efforts he received the Nobel Prize for Physiology or Medicine in 1904.
What was Ivan Pavlov’s first job?
Pavlov, the first son of a priest and the grandson of a sexton, spent his youth in Ryazan in central Russia. There, he attended a church school and theological seminary, where his seminary teachers impressed him by their devotion to imparting knowledge. In 1870 he abandoned his theological studies to enter the University of St. Petersburg, where he studied chemistry and physiology. After receiving the M.D. at the Imperial Medical Academy in St. Petersburg (graduating in 1879 and completing his dissertation in 1883), he studied during 1884–86 in Germany under the direction of the cardiovascular physiologist Carl Ludwig (in Leipzig) and the gastrointestinal physiologist Rudolf Heidenhain (in Breslau).
Having worked with Ludwig, Pavlov’s first independent research was on the physiology of the circulatory system. From 1888 to 1890, in the laboratory of Botkin in St. Petersburg, he investigated cardiac physiology and the regulation of blood pressure.
He became so skillful a surgeon that he was able to introduce a catheter into the femoral artery of a dog almost painlessly without anesthesia and to record the influence on blood pressure of various pharmacological and emotional stimuli. By careful dissection of the fine cardiac nerves, he was able to demonstrate the control of the strength of the heartbeat by nerves leaving the cardiac plexus; by stimulating the severed ends of the cervical nerves, he showed the effects of the right and left vagal nerves on the heart.
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Faces of Science
Pavlov married a pedagogical student in 1881, a friend of the author Fyodor Dostoyevsky, but he was so impoverished that at first they had to live separately. He attributed much of his eventual success to his wife, a domestic, religious, and literary woman, who devoted her life to his comfort and work. In 1890 he became professor of physiology in the Imperial Medical Academy, where he remained until his resignation in 1924. At the newly founded Institute of Experimental Medicine, he initiated precise surgical procedures for animals, with strict attention to their postoperative care and facilities for the maintenance of their health.
By observing irregularities of secretions in normal unanesthetized animals, Pavlov was led to formulate the laws of the conditioned reflex, a subject that occupied his attention from about 1898 until 1930. He used the salivary secretion as a quantitative measure of the psychical, or subjective, activity of the animal, in order to emphasize the advantage of objective, physiological measures of mental phenomena and higher nervous activity. He sought analogies between the conditional (commonly though incorrectly translated as “conditioned”) reflex and the spinal reflex.
According to the English physiologist Sir Charles Sherrington, the spinal reflex is composed of integrated actions of the nervous system involving such complex components as the excitation and inhibition of many nerves, induction (i.e., the increase or decrease of inhibition brought on by previous excitation), and the irradiation of nerve impulses to many nerve centres. To these components, Pavlov added cortical and subcortical influences, the mosaic action of the brain, the effect of sleep on the spread of inhibition, and the origin of neurotic disturbances principally through a collision, or conflict, between cortical excitation and inhibition.
Feb 2, 2024 · Ivan Pavlov discovered classical conditioning during his dog experiments in the late 1890s and early 1900s. His seminal work on classical conditioning, often called Pavlovian conditioning, laid the foundation for our understanding of associative learning and its role in behavior modification.
Learn about the life and achievements of Ivan Pavlov, the Russian physiologist who discovered the conditioned reflex and the role of the cerebral cortex in psychic activity. Find out how he developed the surgical method of chronic experiment and the theory of reflexes.
Sep 28, 2023 · Ivan Pavlov may not have set out to change the face of psychology, but his work had a profound and lasting influence on the science of the mind and behavior. His discovery of classical conditioning helped establish the school of thought known as behaviorism.
Apr 2, 2014 · Russian physiologist Ivan Petrovich Pavlov developed his concept of the conditioned reflex through a famous study with dogs and won a Nobel Prize Award in 1904.
Nov 7, 2019 · Ivan Petrovich Pavlov (September 14, 1849 - February 27, 1936) was a Nobel Prize-winning physiologist best known for his classical conditioning experiments with dogs. In his research, he discovered the conditioned reflex, which shaped the field of behaviorism in psychology. Fast Facts: Ivan Pavlov. Occupation: Physiologist.
