Paul Broca

Paul Broca
Pierre Paul Broca

Pierre Paul Broca
Born 28 June 1824 (1824-06-28)
Sainte-Foy-la-Grande, Gironde
Died 9 July 1880 (1880-07-10)
Nationality French
Fields anthropology, anatomy, medicine

Pierre Paul Broca (28 June 1824 – 9 July 1880) was a French physician, surgeon, anatomist, and anthropologist. He was born in Sainte-Foy-la-Grande, Gironde. He is best known for his research on Broca's area, a region of the frontal lobe that has been named after him. Broca’s Area is responsible for articulated language. His work revealed that the brains of patients suffering from aphasia contained lesions in a particular part of the cortex, in the left frontal region. This was the first anatomical proof of the localization of brain function. Broca's work also contributed to the development of physical anthropology, advancing the science of anthropometry.[1]

Contents

Personal life

Pierre Paul Broca was born on June 28, 1824, in Sainte-Foy-la-Grande, Bordeaux, France, the son of Benjamin Broca, a medical practitioner and former surgeon in Napoleon’s service. Broca’s mother was the daughter of a Protestant preacher. Broca received basic education in the school in his hometown, earning a Bachelor's degree at the age of 16. He entered medical school in Paris when he was 17, and graduated at 20, when most of his contemporaries were just beginning as medical students.[2]

After school, he did extensive internship, first with urologist and dermatologist Philippe Ricord (1800–1889) at the Hôpital du Midi, then in 1843 with François Leuret (1797–1851) at the Bicêtre. In 1844, he succeeded to become an intern with Pierre Nicolas Gerdy (1797–1856), a great anatomist and surgeon. After two years with Gerdy, Broca became his assistant.[2]

In 1848, Broca founded a society of free-thinkers, sympathetic to Charles Darwin's theories. Broca was rather inspired with the whole idea of evolution.[citation needed] He once proclaimed, “I would rather be a transformed ape than a degenerate son of Adam”.[3][2]

This brought him in conflict with the church, which described him as a subversive, materialist, and corrupter of the youth. The church’s animosity toward him continued throughout his lifetime, resulting in numerous direct and indirect confrontations between Broca and church authorities.[2]

In 1848, Broca became prosector of anatomy at the University of Paris Medical School, the youngest person ever appointed to the position. He also became secretary of the Société Anatomique. In 1849, he was awarded the degree of doctor of medicine. In the early 1850s, he performed the first experiments in Europe using hypnotism as surgical anesthesia.[2]

In 1853, Broca became professor agrégé, and was appointed surgeon of the hospital. He was elected to the chair of external pathology at the faculty of medicine in 1867, and one year later professor of clinical surgery. In 1868, he became a member of the Académie de medicine, and was appointed the chair of clinical surgery. He served in this capacity until his death. He worked for the Hôpital St. Antoine, the Pitié, the Hôtel des Clinques, and the Hôpital Necker.[2]

Parallel to his medical career, Broca pursued his interest in anthropology. In 1859, he founded the Society of Anthropology of Paris. He served as the secretary of the society from 1862. In 1872, he founded the journal Revue d'anthropologie, and in 1876, the Institute of Anthropology. The church opposed the development of anthropology in France, and in 1876 organized a campaign to stop the teaching of the subject in the Anthropological Institute.[1][2]

Near the end of his life, Paul Broca was elected a lifetime member of the French Senate. He was also a member of the Académie française and held honorary degrees from many other learned institutions, both in France and abroad.[2]

Broca died on July 9, 1880, at the age of 56 due to a brain hemorrhage.[1] His two sons both become distinguished professors of medical science.[2]

Research

Broca's early scientific works dealt with the histology of cartilage and bone, but he also studied cancer pathology, the treatment of aneurysms, and infant mortality. One of his major concerns was the comparative anatomy of the brain. As a neuroanatomist he made important contributions to the understanding of the limbic system and rhinencephalon. Olfaction was for him a sign of animality. He wrote extensively on biological evolution, then known as transformism in France (the term was also adopted in English at the time but is today used little in either language).[2]

In his later career, Broca wrote on public health and public education. He engaged in the discussion on the health care for the poor, becoming an important figure in the Assistance Publique. He also advocated for women’s education and its separation from the church. He opposed famous Félix-Antoine-Philibert Dupanloup (1802–1878), Roman Catholic bishop of Orléans, who wanted to keep control of women’s education.[2]

One of Broca’s major areas of expertise was the comparative anatomy of the brain. His research on the localization of speech led to entirely new research into the lateralization of brain function.[2]

Speech research

Broca is most famous for his discovery of the speech production center of the brain located in the ventroposterior region of the frontal lobes (now known as Broca's area). He arrived at this discovery by studying the brains of aphasic patients (persons with speech and language disorders resulting from brain injuries).[4]

This area of study began for Broca from an intellectual attack and the ensuing challenges thereafter. Initially, Franz Joseph Gall (1758-1828) claimed his very popular theory of Phrenology and localization of function in the brain, but it was attacked by Pierre Flourens (1794-1867) who claimed that, by careful ablation of various brain regions, he had disproved Gall's hypotheses. However, Gall's former student, Jean-Baptiste Bouillaud (1796-1881), kept the localization of function hypothesis alive (especially with regards to a "language center"), but ended up rejecting most of the Phrenology hypothesis. Bouillaud challenged professionals of the time to disprove him by finding a case of frontal lobe damage unaccompanied by a disorder of speech. His son-in-law, Ernest Aubertin (1825-1893), began seeking out patients to either prove or disprove the theory, of which he found several in support of it.[4]

Broca's Society of Anthropology of Paris became the new platform for the localization of function controversy when several experts of head and brain anatomy joined, including Aubertin. Most of these experts still supported Flourens argument, but Aubertin was persistent in presenting new patients to counter their views. However, it was Broca, not Aubertin, who finally put the localization of function existence issue to rest.[4]

In 1861, Broca heard of a patient, named Leborgne, in the Bicêtre Hospital who had a 21-year progressive loss of speech and paralysis but not a loss of comprehension nor mental function. He was nicknamed "Tan" due to his inability to clearly speak any words other than "tan". [4][5]

When Leborgne died just a few days later, Broca performed an autopsy. He determined that, as predicted, Leborgne did in fact have a lesion in the frontal lobe of the left cerebral hemisphere. From a comparative progression of Leborgne's loss of speech and motor movement, the area of the brain important for speech production was determined to lie within the third convolution of the left frontal lobe, next to the lateral sulcus. For the next two years, Broca went on to find autopsy evidence from 12 more cases in support of the localization of articulated language.[4][5]

Although history credits this discovery to Broca, another French neurologist, Marc Dax, made similar observations a generation earlier, but he died shortly after with no chance to further his evidence.[citation needed] Today the brains of many of Broca's aphasic patients are still preserved in the Musée Dupuytren, and his collection of casts in the Musée d'Anatomie Delmas-Orfila-Rouvière. Broca presented his study on Leborgne in 1861 in the Bulletin of the Société Anatomique.[4][5]

Patients with damage to Broca's area and/or to neighboring regions of the left inferior frontal lobe are often categorized clinically as having Broca's aphasia. This type of aphasia, which often involves impairments in speech output, can be contrasted with Wernicke's aphasia, named for Karl Wernicke, which is characterized by damage to more posterior regions of the left temporal lobe, and is often characterized by impairments in language comprehension.[4][5]

Anthropological research

Broca first become acquainted with anthropology through the works of Isidore Geoffroy-Saint Hilaire (1805–1861), Antoine Étienne Reynaud Augustin Serres (1786–1868) and Jean Louis Armand de Quatrefages de Bréau (1810–1892), and anthropology soon became his lifetime interest. He spent much time at his Anthropological Institute, studying skulls and bones. In that sense, Broca was a pioneer in the study of physical anthropology. He advanced the science of cranial anthropometry by developing many new types of measuring instruments (craniometers) and numerical indices.[2]

Broca also contributed significantly to the field of comparative anatomy of primates. He was interested in the relationship between anatomical features of the brain and mental capabilities, such as intelligence. He believed, as did many in his time, that man's intellectual qualities could be measured by the size of his brain.[citation needed]

Broca published around 223 papers on general anthropology, physical anthropology, ethnology, and other branches of this field. He founded the Société d'Anthropologie de Paris in 1859, the Revue d'Anthropologie in 1872, and the School of Anthropology in Paris in 1876.[citation needed]

Broca's legacy

The discovery of Broca's area revolutionized the understanding of language processing, speech production, and comprehension, as well as what effects damage to this area may cause. Broca played a major role in the localization of function debate, by resolving the issue scientifically with Leborgne and his 12 cases thereafter. His research led others to discover the location of a wide variety of other functions, specifically Wernicke's area.[citation needed]

New research has found that dysfunction in the area may lead to other speech disorders such as stuttering and apraxia of speech. Recent anatomical neuroimaging studies have shown that the pars opercularis of Broca's area is anatomically smaller in individuals who stutter whereas the pars triangularis appears to be normal.[citation needed]

He also invented more than 20 measuring instruments for the use in craniology, and helped standardize measuring procedures.[2]

Publications

  • Broca, Paul. 1849. De la propagation de l’inflammation – Quelques propositions sur les tumeurs dites cancéreuses. Doctoral dissertation.
  • Broca, Paul. 1856. Traité des anévrismes et leur traitement. Paris: Labé & Asselin
  • Broca, Paul. 1861. Sur le principe des localisations cérébrales. Bulletin de la Société d"Anthropologie 2: 190–204.
  • Broca, Paul. 1861. Perte de la parole, ramollissement chronique et destruction partielle du lobe antérieur gauche. Bulletin de la Société d"Anthropologie 2: 235–38.
  • Broca, Paul. 1861. Nouvelle observation d'aphémie produite par une lésion de la moitié postérieure des deuxième et troisième circonvolution frontales gauches. Bulletin de la Société Anatomique 36: 398–407.
  • Broca, Paul. 1863. Localisations des fonctions cérébrales. Siège de la faculté du langage articulé. Bulletin de la Société d"Anthropologie 4: 200–208.
  • Broca, Paul. 1866. Sur la faculté générale du langage, dans ses rapports avec la faculté du langage articulé. Bulletin de la Société d"Anthropologie deuxième série 1: 377–82.
  • Broca, Paul. 1871–1878. Mémoires d'anthropologie, 3 vols. Paris: C. Reinwald,

References

  1. ^ a b c “Dr. Paul Broca” Science. Vol. 1, No. 8 (Aug. 21, 1880), p. 93. American Association for the Advancement of Science. http://www.jstor.org/stable/2900242.
  2. ^ a b c d e f g h i j k l m n “Memoir of Paul Broca” The Journal of the Anthropological Institute of Great Britain and Ireland, Vol. 10, (1881), pp. 242-261. Royal Anthropological Institute of Great Britain and Ireland. http://www.jstor.org/stable/2841526
  3. ^ Sagan, Carl. 1979. Broca's Brain. Random House: New York.
  4. ^ a b c d e f g Fancher, Raymond E. Pioneers of Psychology , 2nd ed. (New York: W.W. Norton & Co., 1990(1979)), 72-93.
  5. ^ a b c d Broca, Paul. “Remarks on the Seat of the Faculty of Articulated Language, Following an Observation of Aphemia (Loss of Speech)”. Bulletin de la Société Anatomique, Vol. 6, (1861), 330-357. http://psychclassics.asu.edu/Broca/aphemie-e.htm

Literature

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  • Paul Broca — Pierre Paul Broca (* 28. Juni 1824 in Sainte Foy la Grande bei Bergerac; † 9. Juli 1880 in Paris) war ein französischer Anthropologe und Arzt. Nach ihm wurde die Broca Aphasie (Fall des „Monsieur Tan“) und das Broca Zentrum benannt. Er… …   Deutsch Wikipedia

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  • Paul Broca — Paul Pierre Broca (28 de junio de 1824 9 de julio de 1880) fue un médico, anatomista y antropólogo francés. Fue un niño prodigio, consiguiendo graduarse simultáneamente en literatura, matemáticas y física. Ingresó a la escuela de medicina cuando… …   Enciclopedia Universal

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  • Pierre Paul Broca — Paul Broca Pierre Paul Broca (* 28. Juni 1824 in Sainte Foy la Grande bei Bergerac; † 9. Juli 1880 in Paris) war ein französischer Anthropologe und Arzt. Nach ihm wurde die Broca Aphasie (Fall des Monsieur Tan ) und das Broca Zentrum benannt. Er… …   Deutsch Wikipedia

  • Pierre Paul Broca — Broca, Pierre Paul Cirujano y antropólogo francés nacido en 1824. Fundó la Escuela y la Sociedad de Antropología Francesa y como cirujano, localizó en el cerebro el centro del lenguaje, que se halla situado en la tercera circunvolución frontal… …   Diccionario médico

  • Pierre-Paul Broca — noun French anthropologist who studied the craniums and brains of different races of people; remembered for his discovery that articulate speech depends on an area of the brain now known as Broca s area (1824 1880) • Syn: ↑Broca • Instance… …   Useful english dictionary

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