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Ivan Pavlov
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|image = Ivan Pavlov NLM3.jpg|caption =184926|df=yes}}|birth_place = Ryazan, Russian Empire19362709df=yes}}Saint Petersburg>Leningrad, Russian SFSR, Soviet Union|residence = Russian Empire, Soviet Union|nationality = Physiology>Physiologist, physicianS.M. Kirov Military Medical Academy#Imperial Military Medical Academy>Imperial Military Medical AcademySaint Petersburg State University>Saint Petersburg University|doctoral_advisor =|doctoral_students = Pyotr Anokhin, Boris Babkin, Leon OrbeliFounder of modern behavior therapy|Classical conditioning}} John B. Watson|Joseph Wolpe}}|footnotes =}}Ivan Petrovich Pavlov (; {{OldStyleDate|26 September|1849|14 September}}{{spaced ndash}}27 February 1936){{Britannica|447349}} was a Russian physiologist known primarily for his work in classical conditioning.From his childhood days Pavlov demonstrated intellectual curiosity along with an unusual energy which he referred to as "the instinct for research".JOURNAL, Cavendish, Richard.,weblink Death of Ivan Pavlov, History Today, 61, 2, 2011, 9, Inspired by the progressive ideas which D. I. Pisarev, the most eminent of the Russian literary critics of the 1860s, and I. M. Sechenov, the father of Russian physiology, were spreading, Pavlov abandoned his religious career and devoted his life to science. In 1870, he enrolled in the physics and mathematics department at the University of Saint Petersburg in order to study natural science.JOURNAL, Anrep, G. V., Ivan Petrovich Pavlov. 1849–1936, 10.1098/rsbm.1936.0001, Obituary Notices of Fellows of the Royal Society, 2, 5, 1–18, 1936, 769124, Pavlov won the Nobel Prize for Physiology or Medicine in 1904,WEB,weblink The Nobel Prize in Physiology or Medicine 1904, nobelprize.org, 28 January 2013, becoming the first Russian Nobel laureate. A survey in the Review of General Psychology, published in 2002, ranked Pavlov as the 24th most cited psychologist of the 20th century.JOURNAL, Haggbloom, Steven J., etal, The 100 most eminent psychologists of the 20th century, Review of General Psychology, 6, 2, 2002, 139–152, 10.1037/1089-2680.6.2.139,weblink Warnick, Jason E., Jones, Vinessa K., Yarbrough, Gary L., Russell, Tenea M., Borecky, Chris M., McGahhey, Reagan, Powell, John L., III, 10.1.1.586.1913, Pavlov's principles of classical conditioning have been found to operate across a variety of behavior therapies and in experimental and clinical settings, such as educational classrooms and even reducing phobias with systematic desensitization.BOOK, Olson, M. H., Hergenhahn, B. R., An Introduction to Theories of Learning, 2009, Prentice Hall, Upper Saddle River, NJ, 201–203, 8th, BOOK,weblink Dougher, Michael J., Clinical Behavior Analysis, Context Press, August 1, 1999, April 1, 2018,

Education and early life

File:Pavlov House Ryazan.JPG|thumb|left|The Pavlov Memorial Museum, (Ryazan]]: Pavlov's former home, built in the early 19th centuryThe memorial estate {{webarchive|url=https://web.archive.org/web/20121114175850weblink |date=14 November 2012 }} About the house)Ivan Pavlov, the eldest of eleven children,BOOK, Ivan Petrovich Pavlov, Biographical Dictionary of Psychology, Routledge, 2002, 978-0415285612, Sheehy, Noel, Chapman, Antony J., Conroy, Wendy A., was born in Ryazan, Russian Empire. His father, Peter Dmitrievich Pavlov (1823–1899), was a village Russian orthodox priest.WEB, The Nobel Prize in Physiology and Medicine 1904 Ivan Pavlov,weblink Nobelmedia, 2 February 2012, His mother, Varvara Ivanovna Uspenskaya (1826–1890), was a devoted homemaker. As a child, Pavlov willingly participated in house duties such as doing the dishes and taking care of his siblings. He loved to garden, ride his bicycle, row, swim, and play gorodki; he devoted his summer vacations to these activities.{{harvp|Asratyan|1953|p=8}} Although able to read by the age of seven, Pavlov was seriously injured when he fell from a high wall onto a stone pavement. As a result of the injuries he sustained{{harvp|Asratyan|1953|p=9}} he did not begin formal schooling until he was 11 years old.Pavlov attended the Ryazan church school before entering the local theological seminary. In 1870, however, he left the seminary without graduating in order to attend the university at St. Petersburg. There he enrolled in the physics and math department and took natural science courses. In his fourth year, his first research project on the physiology of the nerves of the pancreas{{harvp|Asratyan|1953|pp=9–11}} won him a prestigious university award. In 1875, Pavlov completed his course with an outstanding record and received the degree of Candidate of Natural Sciences. Impelled by his overwhelming interest in physiology, Pavlov decided to continue his studies and proceeded to the Imperial Academy of Medical Surgery. While at the Academy, Pavlov became an assistant to his former teacher, Elias von Cyon.BOOK, Todes, Daniel Philip, Pavlov's Physiology Factory: Experiment, Interpretation, Laboratory Enterprise,weblink 2002, JHU Press, 978-0-8018-6690-6, 50–, He left the department when de Cyon was replaced by another instructor.After some time, Pavlov obtained a position as a laboratory assistant to Konstantin Nikolaevich Ustimovich at the physiological department of the Veterinary Institute.{{harvp|Asratyan|1953|p=12}} For two years, Pavlov investigated the circulatory system for his medical dissertation. In 1878, Professor S. P. Botkin, a famous Russian clinician, invited the gifted young physiologist to work in the physiological laboratory as the clinic's chief. In 1879, Pavlov graduated from the Medical Military Academy with a gold medal award for his research work. After a competitive examination, Pavlov won a fellowship at the Academy for postgraduate work.{{harvp|Asratyan|1953|p=13}} The fellowship and his position as director of the Physiological Laboratory at Botkin's clinic enabled Pavlov to continue his research work. In 1883, he presented his doctor's thesis on the subject of The centrifugal nerves of the heart and posited the idea of nervism and the basic principles on the trophic function of the nervous system. Additionally, his collaboration with the Botkin Clinic produced evidence of a basic pattern in the regulation of reflexes in the activity of circulatory organs.(File:Ivan Pavlov NLM2.jpg|thumb|Ivan Pavlov)

Influences

He was inspired to pursue a scientific career by D. I. Pisarev, a literary critique and natural science advocate of the time and I. M. Sechenov, a Russian physiologist, whom Pavlov described as 'The father of physiology'.

Career

After completing his doctorate, Pavlov went to Germany where he studied in Leipzig with Carl Ludwig and Eimear Kelly in the Heidenhain laboratories in Breslau. He remained there from 1884 to 1886. Heidenhain was studying digestion in dogs, using an exteriorized section of the stomach. However, Pavlov perfected the technique by overcoming the problem of maintaining the external nerve supply. The exteriorized section became known as the Heidenhain or Pavlov pouch.In 1886, Pavlov returned to Russia to look for a new position. His application for the chair of physiology at the University of Saint Petersburg was rejected. Eventually, Pavlov was offered the chair of pharmacology at Tomsk University in Siberia and at the University of Warsaw in Poland. He did not take up either post. In 1890, he was appointed the role of professor of Pharmacology at the Military Medical Academy and occupied the position for five years.{{harvp|Asratyan|1953|pp=17–18}} In 1891, Pavlov was invited to the Imperial Institute of Experimental Medicine in St. Petersburg to organize and direct the Department of Physiology.JOURNAL, Windholz, George, Ivan P. Pavlov: An overview of his life and psychological work, American Psychologist, 1997, 52, 9, 941–946, 10.1037/0003-066X.52.9.941, Over a 45-year period, under his direction, the Institute became one of the most important centers of physiological research in the world. Pavlov continued to direct the Department of Physiology at the Institute, while taking up the chair of physiology at the Medical Military Academy in 1895. Pavlov would head the physiology department at the Academy continuously for three decades.Starting in 1901, Pavlov was nominated over four successive years for the Nobel Prize in Physiology or Medicine. He did not win the prize until 1904 because his previous nominations were not specific to any discovery, but based on a variety of laboratory findings.BOOK, Ivan Pavlov, Science in the Early Twentieth Century: An Encyclopedia., When Pavlov received the Nobel Prize it was specified that he did so "in recognition of his work on the physiology of digestion, through which knowledge on vital aspects of the subject has been transformed and enlarged".It was at the Institute of Experimental Medicine that Pavlov carried out his classical experiments on the digestive glands. That is how he eventually won the Nobel prize mentioned above.{{harvp|Asratyan|1953|p=18}} Pavlov investigated the gastric function of dogs, and later, children,BOOK, Reagan, Leslie A., Medicine's moving pictures, 2007, University of Rochester Press, Rochester, NY, 978-1-58046-234-1, 285, etal, by externalizing a salivary gland so he could collect, measure, and analyze the saliva and what response it had to food under different conditions. 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 laboratory housed a full-scale kennel for the experimental animals. Pavlov was interested in observing their long-term physiological processes. This required keeping them alive and healthy in order to conduct chronic experiments, as he called them. These were experiments over time, designed to understand the normal functions of animals. This was a new kind of study, because previously experiments had been “acute,” meaning that the dog went through vivisection which ultimately killed the animal in the process.A 1921 article by S. Morgulis in the journal Science was critical of Pavlov's work, raising concerns about the environment in which these experiments had been performed. Based on a report from H. G. Wells, claiming that Pavlov grew potatoes and carrots in his lab, the article stated, "It is gratifying to be assured that Professor Pavlov is raising potatoes only as a pastime and still gives the best of his genius to scientific investigation".JOURNAL, 10.1126/science.53.1360.74, 17790056, Professor Pavlov, 1921, Morgulis, S., Science, 53, 1360, 74, 1921Sci....53Q..74M, That same year, Pavlov began holding laboratory meetings known as the 'Wednesday meetings' at which he spoke frankly on many topics, including his views on psychology. These meetings lasted until he died in 1936.File:Nesterov-Pavlov.jpg|thumb|260px|Pavlov in 1935, by Mikhail NesterovMikhail NesterovPavlov was highly regarded by the Soviet government, and he was able to continue his research until he reached a considerable age. He was praised by Lenin.WEB,weblink Concerning The Conditions Ensuring The Research Work Of Academician I. P. Pavlov and his associates, Lenin, V.I., Izvestia, 11 February 1921, Despite praise from the Soviet Union government, the money that poured in to support his laboratory, and the honours he was given, Pavlov made no attempts to conceal the disapproval and contempt with which he regarded Soviet Communism.In 1923, he stated that he would not sacrifice even the hind leg of a frog to the type of social experiment that the regime was conducting in Russia. Four years later he wrote to Stalin, protesting at what was being done to Russian intellectuals and saying he was ashamed to be a Russian. After the murder of Sergei Kirov in 1934, Pavlov wrote several letters to Molotov criticizing the mass persecutions which followed and asking for the reconsideration of cases pertaining to several people he knew personally.Conscious until his very last moment, Pavlov asked one of his students to sit beside his bed and to record the circumstances of his dying. He wanted to create unique evidence of subjective experiences of this terminal phase of life.Chance, Paul (1988). Learning and Behaviour. Wadsworth Pub. Co. {{ISBN|0-534-08508-3}}. p. 48. Pavlov died of double pneumonia at the age of 86. He was given a grandiose funeral, and his study and laboratory were preserved as a museum in his honour.

Reflex system research

{{See also|Reflex}}File:One of Pavlov's dogs.jpg|thumb|upright=1.3|One of Pavlov's dogs with a surgically implanted cannula to measure salivation, preserved in the Pavlov Museum in Ryazan, Russia ]]Pavlov contributed to many areas of physiology and neurological sciences. Most of his work involved research in temperament, conditioning and involuntary reflex actions.Pavlov performed and directed experiments on digestion, eventually publishing The Work of the Digestive Glands in 1897, after 12 years of research. His experiments earned him the 1904 Nobel Prize in Physiology and Medicine.WEB,weblink 1904 Nobel prize laureates, Nobelprize.org, 10 December 1904, 15 April 2012, These experiments included surgically extracting portions of the digestive system from animals, severing nerve bundles to determine the effects, and implanting fistulas between digestive organs and an external pouch to examine the organ's contents. This research served as a base for broad research on the digestive system.Further work on reflex actions involved involuntary reactions to stress and pain.

Research on types and properties of nervous systems

Pavlov was always interested in biomarkers of temperament types described by Hippocrates and Galen. He called these biomarkers "properties of nervous systems" and identified three main properties: (1) strength, (2) mobility of nervous processes and (3) a balance between excitation and inhibition and derived four types based on these three properties. He extended the definitions of the four temperament types under study at the time: phlegmatic, choleric, sanguine, and melancholic, updating the names to "the strong and impetuous type, the strong equilibrated and quiet type, the strong equilibrated and lively type, and the weak type."Pavlov and his researchers observed and began the study of transmarginal inhibition (TMI), the body's natural response of shutting down when exposed to overwhelming stress or pain by electric shock.Mazlish, Bruce (1995), Fourth Discontinuity: The Co-Evolution of Humans and Machines, Yale University Press, pp. 122–123, {{ISBN|0-300-06512-4}} This research showed how all temperament types responded to the stimuli the same way, but different temperaments move through the responses at different times. He commented "that the most basic inherited difference ... was how soon they reached this shutdown point and that the quick-to-shut-down have a fundamentally different type of nervous system."Rokhin, L, Pavlov, I and Popov, Y. (1963), Psychopathology and Psychiatry, Foreign Languages Publication House: Moscow.

Pavlov on education

The basics of Pavlov's classical conditioning serve as a historical backdrop for current learning theories.BOOK, William Moore, J., Manning, S. A., Smith, W. I., 978-0070429024, Conditioning and Instrumental Learning, 1978, McGraw-Hill Book Company, New York, NY, 52–61, However, the Russian physiologist's initial interest in classical conditioning occurred almost by accident during one of his experiments on digestion in dogs.BOOK, Tarpy, Roger M., Basic Principles of Learning, 1975, Scott, Foresman and Company, Glenview, IL, 15–17, Considering that Pavlov worked closely with animals throughout many of his experiments, his early contributions were primarily about animal learning. However, the fundamentals of classical conditioning have been examined across many different organisms, including humans. The basic underlying principles of Pavlov's classical conditioning have extended to a variety of settings, such as classrooms and learning environments.Classical conditioning focuses on using preceding conditions to alter behavioral reactions. The principles underlying classical conditioning have influenced preventative antecedent control strategies used in the classroom.JOURNAL, Kern, Lee, Clemens, Nathan H., Antecedent strategies to promote appropriate classroom behavior, Psychology in the Schools, 2007, 44, 1, 65–75, 10.1002/pits.20206, Classical conditioning set the groundwork for the present day behavior modification practices, such as antecedent control. Antecedent events and conditions are defined as those conditions occurring before the behavior.BOOK, Alberto, Paul A., Troutman, Anne C., Applied Behavior Analysis for Teachers, 2013, Pearson Education, Inc., New Jersey, Ninth, Pavlov's early experiments used manipulation of events or stimuli preceding behavior (i.e., a tone) to produce salivation in dogs much like teachers manipulate instruction and learning environments to produce positive behaviors or decrease maladaptive behaviors. Although he did not refer to the tone as an antecedent, Pavlov was one of the first scientists to demonstrate the relationship between environmental stimuli and behavioral responses. Pavlov systematically presented and withdrew stimuli to determine the antecedents that were eliciting responses, which is similar to the ways in which educational professionals conduct functional behavior assessments.JOURNAL, Stichter, Janine P., Randolph, Jena K., Kay, Denise, Gage, Nicholas, The use of structural analysis to develop antcedent-based interventions for students with autism, Journal of Austim Development Disroder, 2009, 39, 6, 883–896, 10.1007/s10803-009-0693-8, 19191017, Antecedent strategies are supported by empirical evidence to operate implicitly within classroom environments. Antecedent-based interventions are supported by research to be preventative, and to produce immediate reductions in problem behaviors.

Legacy

The concept for which Pavlov is famous is the "conditioned reflex" (or in his own words the conditional reflex) he developed jointly with his assistant Ivan Filippovitch Tolochinov in 1901. He had come to learn this concept of conditioned reflex when examining the rates of salivations among dogs. Pavlov had learned that when a buzzer or metronome was sounded in subsequent time with food being presented to the dog in consecutive sequences, the dog would initially salivate when the food was presented. The dog would later come to associate the sound with the presentation of the food and salivate upon the presentation of that stimulus.BOOK
, Todes
, Daniel Philip
, Pavlov's Physiology Factory
, Johns Hopkins University Press
, 2002
, Baltimore MD
, 232 ff
, 978-0-8018-6690-6,
Tolochinov, whose own term for the phenomenon had been "reflex at a distance", communicated the results at the Congress of Natural Sciences in Helsinki in 1903.BOOK, Pavlov, I. P., Conditioned Reflexes: An Investigation of the Physiological Activity of the Cerebral Cortex. Translated and Edited by G. V. Anrep, 1927, Oxford University Press, London, 142,weblink Later the same year Pavlov more fully explained the findings, at the 14th International Medical Congress in Madrid, where he read a paper titled The Experimental Psychology and Psychopathology of Animals.As Pavlov's work became known in the West, particularly through the writings of John B. Watson and B. F. Skinner, the idea of "conditioning" as an automatic form of learning became a key concept in the developing specialism of comparative psychology, and the general approach to psychology that underlay it, behaviorism. Pavlov's work with classical conditioning was of huge influence to how humans perceive themselves, their behavior and learning processes and his studies of classical conditioning continue to be central to modern behavior therapy.JOURNAL, Plaud, J. J., Wolpe, J., 1997, Pavlov's contributions to behavior therapy: The obvious and the not so obvious, American Psychologist, 52, 9, 966–972, 9382243, 10.1037/0003-066X.52.9.966, The British philosopher Bertrand Russell observed that "[w]hether Pavlov's method's can be made to cover the whole of human behaviour is open to question, but at any rate they cover a very large field and within this field they have shown how to apply scientific methods with quantitative exactitude".BOOK, Russell, Bertrand, The Scientific Outlook, 1931, George Allen & Unwin, London, 56, Pavlov's research on conditional reflexes greatly influenced not only science, but also popular culture. Pavlovian conditioning is a major theme in Aldous Huxley's dystopian novel, Brave New World, and in Thomas Pynchon's Gravity's Rainbow.It is popularly believed that Pavlov always signaled the occurrence of food by ringing a bell. However, his writings record the use of a wide variety of stimuli, including electric shocks, whistles, metronomes, tuning forks, and a range of visual stimuli, in addition to the ring of a bell. In 1994, Catania cast doubt on whether Pavlov ever actually used a bell in his experiments.Catania, A. Charles (1994); Query: Did Pavlov's Research Ring a Bell?, Psycoloquy Newsletter, Tuesday, 7 June 1994 Littman tentatively attributed the popular imagery to Pavlov's contemporaries Vladimir Mikhailovich Bekhterev and John B. Watson. Roger K. Thomas, of the University of Georgia, however, said they had found "three additional references to Pavlov's use of a bell that strongly challenge Littman's argument".JOURNAL,weblink Thomas, Roger K., 1994, Pavlov's dogs "dripped Saliva at the Sound of a Bell", Psycoloquy, 5, 80, In reply, Littman suggested that Catania's recollection, that Pavlov did not use a bell in research, was "convincing ... and correct".JOURNAL,weblink Littman, Richard A., 1994, Bekhterev and Watson Rang Pavlov's Bell, Psycoloquy, 5, 49, In 1964 the eminent psychologist H. J. Eysenck reviewed Pavlov's "Lectures on Conditioned Reflexes" for the British Medical Journal: Volume I – "Twenty-five Years of Objective Study of the Higher Nervous Activity of Animals", Volume II – "Conditioned Reflexes and Psychiatry".JOURNAL, 10.1136/bmj.2.5401.111-b, Pavlov's Writings, 1964, Eysenck, H. J., BMJ, 2, 5401, 111, 1815950, The Pavlov Institute of Physiology of the Russian Academy of Sciences was founded by Pavlov in 1925 and named after him following his death.Pavlov Institute of Physiology of the Russian Academy of Sciences {{webarchive|url=https://web.archive.org/web/20150313175854weblink |date=13 March 2015 }}. infran.ru

Awards and honours

Pavlov was awarded the Nobel Prize in Physiology or Medicine in 1904. He was elected a Foreign Member of the Royal Society (ForMemRS) in 1907 and was awarded the Royal Society's Copley Medal in 1915. He became a foreign member of the Royal Netherlands Academy of Arts and Sciences in 1907.WEB,weblink Ivan Petrovich Pavlow (1849–1936), Royal Netherlands Academy of Arts and Sciences, 26 July 2015, Pavlov's dog, the Pavlovian session and Pavlov's typology are named in his honour. The asteroid 1007 Pawlowia and the lunar crater Pavlov were also named after him.

Personal life

Ivan Pavlov married Seraphima Vasilievna Karchevskaya on 1 May 1881, whom he had met in 1878 or 1879 when she went to St. Petersburg to study at the Pedagogical Institute. Seraphima, called Sara for short, was born in 1855. In her later years, she suffered from ill health and died in 1947.The first nine years of their marriage were marred by financial problems; Pavlov and his wife often had to stay with others in order to have a home, and for a time, the two lived apart so that they could find hospitality. Although their poverty caused despair, material welfare was a secondary consideration. Sara's first pregnancy ended in a miscarriage. When she conceived again, the couple took precautions, and she safely gave birth to their first child, a boy whom they named Mirchik; Sara became deeply depressed following Mirchik's sudden death in childhood.Ivan and Sara eventually had four more children: Vladimir, Victor, Vsevolod, and Vera. Their youngest son, Vsevolod, died of pancreatic cancer in 1935, only one year before his father.BOOK, Babkin, B.P., Pavlov, A Biography, 1949, The University of Chicago Press, Chicago and London, 27–54,weblink 978-1406743975, Pavlov was an atheist.Pavlov's follower E.M. Kreps asked him whether he was religious. Kreps writes that Pavlov smiled and replied: "Listen, good fellow, in regard to [claims of] my religiosity, my belief in God, my church attendance, there is no truth in it; it is sheer fantasy. I was a seminarian, and like the majority of seminarians, I became an unbeliever, an atheist in my school years." Quoted in JOURNAL, Windholz, George, Pavlov's Religious Orientation, Journal for the Scientific Study of Religion, 25, 3, 1986, 320–27, 10.2307/1386296, 1386296,

See also

References

{{Reflist|24em|refs=BOOK
, Dictionary of Minor Planet Names – (1007) Pawlowia
, Schmadel, Lutz D.
, Springer Berlin Heidelberg
, 87
, 2007
,weblink
, 978-3-540-00238-3
, 10 January 2018,
}}

Sources

  • BOOK, Asratyan, E. A., I. P. Pavlov: His Life and Work, 1953, Foreign Languages Publishing House, Moscow, harv,

Further reading

  • BOOK, Boakes, Robert, From Darwin to behaviourism, 1984, Cambridge University Press, Cambridge, 978-0-521-23512-9,
  • BOOK, Firkin, Barry G., J.A. Whitworth, Dictionary of Medical Eponyms, 1987, Parthenon Publishing, 978-1-85070-333-4, registration,weblink
  • JOURNAL, Todes, D. P., 1997, Pavlov's Physiological Factory, Isis, 88, 205–246, 2, 236572, 10.1086/383690,

External links

{{Library resources box|by=yes|onlinebooks=no|about=yes|wikititle=Ivan Pavlov}}{{Commons category}}
  • PBS article
  • weblink" title="web.archive.org/web/20050426171314weblink">Institute of Experimental Medicine article on Pavlov
  • weblink" title="web.archive.org/web/20100924061613weblink">Link to a list of Pavlov's dogs with some pictures
  • Commentary on Pavlov's Conditioned Reflexes from 50 Psychology Classics
  • weblink" title="web.archive.org/web/20120706061005weblink">Ivan Pavlov and his dogs
  • {{Internet Archive author |sname=Ivan Petrovich Pavlov}}
  • {{Librivox author |id=9043}}
  • {{PM20|FID=pe/013324}}
{{Copley Medallists 1901-1950}}{{Nobel Prize in Physiology or Medicine Laureates 1901-1925}}{{Psychology}}{{Authority control}}

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