Craniometry is measurement of the cranium (the main part of the skull), usually the human cranium. It is a subset of cephalometry, measurement of the head, which in humans is a subset of anthropometry, measurement of the human body. It is distinct from phrenology, the pseudoscience that tried to link personality and character to head shape, and physiognomy, which tried the same for facial features. However, these fields have all claimed the ability to predict traits or intelligence.
More direct measurements involve examinations of brains from corpses, or more recently, imaging techniques such as MRI, which can be used on living persons. Such measurements are used in research on neuroscience and intelligence.
Quite separately, certain artists from the 15th century onward made measurements of heads and skulls with a view to attaining greater accuracy in their representation of those parts of the human frame. Bernard Palissy and Albrecht Dürer were pioneers in such researches.[1]
Swedish professor of anatomy Anders Retzius (1796–1860) first used the cephalic index in physical anthropology to classify ancient human remains found in Europe. He classified brains into three main categories, "dolichocephalic" (from the Ancient Greekkephalê, head, and dolikhos, long and thin), "brachycephalic" (short and broad) and "mesocephalic" (intermediate length and width).
A similar classification was the vertical cephalic index, the categories of which were "chamaecranic" (low-skulled), "orthocranic", (medium high-skulled), and "hypsicranic" (high-skulled).
These terms were then used by Georges Vacher de Lapouge (1854–1936), one of the founders of pseudo-scientific theories in this area and a theoretician of eugenics, who in L'Aryen et son rôle social (1899 – "The Aryan and his social role") divided humanity into various, hierarchized, different "races", spanning from the "Aryan white race, dolichocephalic", to the "brachycephalic" "mediocre and inert" race, best represented by the population of "France, Spain, Italy, all of Asia, and most of the Slavic countries" Hecht, Jennifer Michael (2003). The end of the soul: scientific modernity, atheism, and anthropology in France. New York: Columbia University Press. p.171. ISBN978-0231128469.
In 1784, Louis-Jean-Marie Daubenton, who wrote many comparative anatomy memoirs for the Académie française, published the Mémoire sur les différences de la situation du grand trou occipital dans l'homme et dans les animaux (which translates as Memoir on the Different Positions of the Occipital Foramen in Man and Animals).
Six years later, Pieter Camper (1722–1789), distinguished both as an artist and as an anatomist, published some lectures containing an account of his craniometrical methods. These laid the foundation of all subsequent work.[1]
Pieter Camper invented the "facial angle", a measure meant to determine intelligence among various species. According to this technique, a "facial angle" was formed by drawing two lines: one horizontally from the nostril to the ear; and the other perpendicularly from the advancing part of the upper jawbone to the most prominent part of the forehead.
Camper claimed that antique statues presented an angle of 90°, Europeans of 80°, Black people of 70° and the orangutan of 58°, thus displaying a hierarchic view of mankind, based on a decadent conception of history. This scientific research was continued by Étienne Geoffroy Saint-Hilaire (1772–1844) and Paul Broca (1824–1880), founder of the Anthropological Society in 1859 in France.
In 1856, workers found in a limestone quarry the skull of a Neanderthal man, thinking it to be the remains of a bear. They gave the material to amateur naturalist Johann Karl Fuhlrott, who turned the fossils over to anatomist Hermann Schaaffhausen. The discovery was jointly announced in 1857, giving rise to paleoanthropology.
Measurements were first made to compare the skulls of men with those of other animals. This wide comparison constituted the first subdivision of craniometric studies.[1] The artist-anatomist Camper developed a theory to measure the facial angle, for which he is chiefly known in later anthropological literature.
Camper's work followed 18th-century scientific theories. His measurements of facial angle were used to liken the skulls of non-Europeans to those of apes.
"Craniometry" also played a role in the foundation of the United States and the ideologies or racism that would become ingrained in the American psyche. As John Jeffries articulates in The Collision of Culture the Anglo-American hegemony present in America during the eighteenth and nineteenth century helped establish "The American School of Craniometry" which helped establish the American and Western concept of race. As Jeffries points out the rigid establishment of race in eighteenth-century American society came from a new school of sciences which sought to distance Anglo-Saxons from the African American population. The distancing of the African population in American society through craniometry helped greatly in the efforts to scientifically prove they were inferior. The ideologies set forth by this new "American School" of thought were then used to justify maintaining an enslaved population to sustain the increasing number of slave plantations in the American South during the eighteenth and nineteenth centuries.[3]
In the 19th century the names of notable contributors to the literature of craniometry quickly increased in number. While it is impossible to analyse each contribution, or even record a complete list of the names of the authors, notable researchers who used craniometric methods to compare humans to other animals included T. H. Huxley (1825–1895) of England and Paul Broca.[1]
Ernst Haeckel (1834–1919) became famous for his now outdated "recapitulation theory", according to which each individual mirrored the evolution of the whole species during his life. Although outdated, his work contributed then to the examination of human life.
These researches on skulls and skeletons helped liberate 19th-century European science from its ethnocentric biases.[4] In particular, Eugène Dubois' (1858–1940) discovery in 1891 in Indonesia of the "Java Man", the first specimen of Homo erectus to be discovered, demonstrated mankind's deep ancestry outside Europe.
Cranial capacity, races and 19th–20th-century scientific ideas
Samuel George Morton (1799–1851), one of the inspirers of physical anthropology, collected hundreds of human skulls from all over the world and started trying to find a way to classify them according to some logical criterion. Influenced by the common theories of his time, he claimed that he could judge the intellectual capacity of a race by the cranial capacity (the measure of the volume of the interior of the skull).
After inspecting three mummies from ancient Egyptian catacombs, Morton concluded that Caucasians and other races were already distinct three thousand years ago. Since the Bible indicated that Noah's Ark had washed up on Mount Ararat, only a thousand years ago before this, Morton claimed that Noah's sons could not possibly account for every race on Earth. According to Morton's theory of polygenism, races have been separate since the start.[5]
Morton claimed that he could judge the intellectual capacity of a race by the skull size. A large skull meant a large brain and high intellectual capacity, and a small skull indicated a small brain and decreased intellectual capacity. Morton collected hundreds of human skulls from all over the world. By studying these skulls he claimed that each race had a separate origin. Morton had many skulls from ancient Egypt, and concluded that the ancient Egyptians were not African, but were White. His two major monographs were the Crania Americana (1839), An Inquiry into the Distinctive Characteristics of the Aboriginal Race of America and Crania Aegyptiaca (1844).
Based on craniometry data, Morton claimed in Crania Americana that the Caucasians had the biggest brains, averaging 87 cubic inches, Indians were in the middle with an average of 82 cubic inches and Negroes had the smallest brains with an average of 78 cubic inches.[5]
Stephen Jay Gould (1941–2002), an American paleontologist, evolutionary biologist and historian of science, studied these craniometric works in The Mismeasure of Man (1981) and claimed Samuel Morton had fudged data and "overpacked" the skulls with filler in order to justify his preconceived notions on racial differences. A subsequent study by the anthropologist John Michael found Morton's original data to be more accurate than Gould describes, concluding that "[c]ontrary to Gould's interpretation... Morton's research was conducted with integrity."[6]
In 2011, physical anthropologists at the University of Pennsylvania, which owns Morton's collection, published a study that concluded that almost every detail of Gould's analysis was wrong and that "Morton did not manipulate his data to support his preconceptions, contra Gould." They identified and remeasured half of the skulls used in Morton's reports, finding that in only 2% of cases did Morton's measurements differ significantly from their own and that these errors either were random or gave a larger than accurate volume to African skulls, the reverse of the bias that Gould imputed to Morton.[7]
Morton's followers, particularly Josiah C. Nott and George Gliddon in their monumental tribute to Morton's work, Types of Mankind (1854), carried Morton's ideas further and backed up his findings which supported the notion of polygenism.
Furthermore, Josiah Nott was the translator of Arthur de Gobineau's An Essay on the Inequality of the Human Races (1853–1855), which is one of the founding works of the group of studies that segregates society based on "race", in contrast to Boulainvilliers' (1658–1722) theory of races. Henri de Boulainvilliers opposed the Français (French people), alleged descendants of the Nordic Franks, and members of the aristocracy, to the Third Estate, considered to be indigenous Gallo-Roman people who were subordinated by the Franks by right of conquest.[clarification needed] Gobineau, meanwhile, made three main divisions between races, based not on colour but on climatic conditions and geographic location, and which privileged the "Aryan" race.
In 1873, Paul Broca (1824–1880) found the same pattern described by Samuel Morton's Crania Americana by weighing brains at autopsy. Other historical studies alleging a Black-White difference in brain size include Bean (1906), Mall, (1909), Pearl, (1934) and Vint (1934).
Furthermore, Georges Vacher de Lapouge's racial classification ("Teutonic", "Alpine" and "Mediterranean") was re-used by William Z. Ripley (1867–1941) in The Races of Europe (1899), who even made a map of Europe according to the alleged cephalic index of its inhabitants.
In Germany, Rudolf Virchow launched a study of craniometry, which gave surprising results according to contemporary theories on the "Aryan race", leading Virchow to denounce the "Nordic mysticism" in the 1885 Anthropology Congress in Karlsruhe.
Josef Kollmann, a collaborator of Virchow, stated in the same congress that the people of Europe, be them German, Italian, English or French, belonged to a "mixture of various races", furthermore declaring that the "results of craniology" led to "struggle against any theory concerning the superiority of this or that European race" on others.[8]
Virchow later rejected measure of skulls as legitimate means of taxonomy. Paul Kretschmer quoted an 1892 discussion with him concerning these criticisms, also citing Aurel von Törok's 1895 work, who basically proclaimed the failure of craniometry.[8]
Craniometry was also used in phrenology, which purported to determine character, personality traits, and criminality on the basis of the shape of the head and thus of the skull. At the turn of the 19th century, Franz Joseph Gall (1758–1822) developed "cranioscopy" (Ancient Greek kranion: skull, scopos: vision), a method to determine the personality and development of mental and moral faculties on the basis of the external shape of the skull.
Cranioscopy was later renamed to phrenology (phrenos: mind, logos: study) by his student Johann Spurzheim (1776–1832), who wrote extensively on the "Drs. Gall and Spurzheim's physiognomical System". Physiognomy claimed a correlation between physical features (especially facial features) and character traits.
It was made famous by Cesare Lombroso (1835–1909), the founder of anthropological criminology, who claimed to be able to scientifically identify links between the nature of a crime and the personality or physical appearance of the offender. The originator of the concept of a "born criminal" and arguing in favor of biological determinism, Lombroso tried to recognize criminals by measurements of their bodies.
He concluded that skull and facial features were clues to genetic criminality, and that these features could be measured with craniometers and calipers with the results developed into quantitative research. A few of the 14 identified traits of a criminal included large jaws, forward projection of jaw, low sloping forehead; high cheekbones, flattened or upturned nose; handle-shaped ears; hawk-like noses or fleshy lips; hard shifty eyes; scanty beard or baldness; insensitivity to pain; long arms, and so on.
Criticisms and revival of past cranial theories in the 20th century
An 1839 drawing by Samuel George Morton of "a Negro head… a Caucasian skull… a Mongol head."
J. Philippe Rushton, psychologist and author of the controversial work Race, Evolution and Behavior (1995), reanalyzed Gould's retabulation in 1989, and argued that Samuel Morton, in his 1839 book Crania Americana, had shown a pattern of decreasing brain size proceeding from East Asians to Europeans to Africans.
In his 1995 book Race, Evolution, and Behavior, Rushton alleged an average endocranial volume of 1,364cm3 for East Asians, 1,347 for white caucasians and 1,268 for black Africans. Other similar claims were previously made by Ho et al. (1980), who measured 1,261 brains at autopsy, and Beals et al. (1984), who measured approximately 20,000 skulls, finding the same East Asian → European → African pattern. However, in the same article Beals explicitly warns against using the findings as indicative of racial traits, "If one merely lists such means by geographical region or race, causes of similarity by genogroup and ecotype are hopelessly confounded".[9] Rushton's findings have also been criticized for questionable methodology, such as lumping in African-Americans with equatorial Africans, as people from hot climates generally have slightly smaller crania.[10] Rushton also compared equatorial Africans from the poorest and least educated areas of Africa against Asians from the wealthiest and most educated areas of Asia and areas with colder climates which generally induce larger cranium sizes in evolution.[10] According to Zack Cernovsky, from one of Rushton's own study it emerges that the average cranial capacity for North American blacks is similar to the average for Caucasians from comparable climatic zones.[10][11] Per Cernovsky, people from different climates tend to have minor differences in brain size, but these do not necessarily imply differences in intelligence; for instance, though women tend to have smaller brains than men they also have more neural complexity and loading in certain areas of the brain than men.[12][13]
Modern use
More direct measurements involve examinations of brains from corpses, or more recently, imaging techniques such as MRI, which can be used on living persons. Such measurements are used in research on neuroscience and intelligence.
Brain volume data and other craniometric data are used in mainstream science to compare modern-day animal species, and to analyze the evolution of the human species in archaeology.
Measurements of the skull based on specific anatomical reference points are used in both forensic facial reconstruction and portrait sculpture.[citation needed]
See also
Wikimedia Commons has media related to Craniometry.
The Mismeasure of Man is a 1981 book by paleontologist Stephen Jay Gould. The book is both a history and critique of the statistical methods and cultural motivations underlying biological determinism, the belief that "the social and economic differences between human groups—primarily races, classes, and sexes—arise from inherited, inborn distinctions and that society, in this sense, is an accurate reflection of biology".
Pierre Paul Broca was a French physician, anatomist and anthropologist. He is best known for his research on Broca's area, a region of the frontal lobe that is named after him. Broca's area is involved with language. His work revealed that the brains of patients with aphasia contained lesions in a particular part of the cortex, in the left frontal region. This was the first anatomical proof of localization of brain function.
The concept of race as a categorization of anatomically modern humans has an extensive history in Europe and the Americas. The contemporary word race itself is modern; historically it was used in the sense of "nation, ethnic group" during the 16th to 19th centuries. Race acquired its modern meaning in the field of physical anthropology through scientific racism starting in the 19th century. With the rise of modern genetics, the concept of distinct human races in a biological sense has become obsolete. In 2019, the American Association of Biological Anthropologists stated: "The belief in 'races' as natural aspects of human biology, and the structures of inequality (racism) that emerge from such beliefs, are among the most damaging elements in the human experience both today and in the past."
The Caucasian race is an obsolete racial classification of humans based on a now-disproven theory of biological race. The Caucasian race was historically regarded as a biological taxon which, depending on which of the historical race classifications was being used, usually included ancient and modern populations from all or parts of Europe, Western Asia, Central Asia, South Asia, North Africa, and the Horn of Africa.
Scientific racism, sometimes termed biological racism, is the pseudoscientific belief that the human species can be subdivided into biologically distinct taxa called "races", and that empirical evidence exists to support or justify racism, racial inferiority, or racial superiority. Before the mid-20th century, scientific racism was accepted throughout the scientific community, but it is no longer considered scientific. The division of humankind into biologically separate groups, along with the assignment of particular physical and mental characteristics to these groups through constructing and applying corresponding explanatory models, is referred to as racialism, race realism, or race science by those who support these ideas. Modern scientific consensus rejects this view as being irreconcilable with modern genetic research.
The Nordic race is an obsolete racial concept which originated in 19th-century anthropology. It was once considered a race or one of the putative sub-races into which some late-19th to mid-20th century anthropologists divided the Caucasian race, claiming that its ancestral homelands were Northwestern and Northern Europe, particularly to populations such as Anglo-Saxons, Germanic peoples, Balts, Baltic Finns, Northern French, and certain Celts and Slavs. The supposed physical traits of the Nordics included light eyes, light skin, tall stature, and dolichocephalic skull; their psychological traits were deemed to be truthfulness, equitability, a competitive spirit, naivete, reservedness, and individualism. In the early 20th century, the belief that the Nordic race constituted the superior branch of the Caucasian race gave rise to the ideology of Nordicism.
The Alpine race is a historical race concept defined by some late 19th-century and early 20th-century anthropologists as one of the sub-races of the Caucasian race. The origin of the Alpine race was variously identified. Ripley argued that it migrated from Central Asia during the Neolithic revolution, splitting the Nordic and Mediterranean populations. It was also identified as descending from the Celts residing in Central Europe in Neolithic times. The Alpine race is supposedly distinguished by its moderate stature, neotenous features, and cranial measurements, such as high cephalic index.
Samuel George Morton was an American physician, natural scientist, and writer. As one of the early figures of scientific racism, he argued against monogenism, the single creation story of the Bible, instead supporting polygenism, a theory of multiple racial creations.
Polygenism is a theory of human origins which posits the view that the human races are of different origins (polygenesis). This view is opposite to the idea of monogenism, which posits a single origin of humanity. Modern scientific views find little merit in any polygenic model due to an increased understanding of speciation in a human context, with the monogenic "Out of Africa" hypothesis and its variants being the most widely accepted models for human origins. Polygenism has historically been heavily used in service of white supremacist ideas and practices, denying a common origin between European and non-European peoples. It can be distinguished between Biblical polygenism, describing a Pre-Adamite or Co-Adamite origin of certain races in the context of the Genesis narrative of Adam and Eve, and scientific polygenism, attempting to find a taxonomic basis for ideas of racial science.
George Robbins Gliddon was an English-born American Egyptologist. He worked as a United States vice-consul in Egypt and assisted Muhammad Ali Pasha's plans to modernize Egypt by attaining sugar, rice, and other mills from the United States. In 1841, he became frustrated with Pasha's destruction of archaeological sites and wrote Appeal to the Antiquaries of Europe on the Destruction of the Monuments of Egypt.
The size of the brain is a frequent topic of study within the fields of anatomy, biological anthropology, animal science and evolution. Measuring brain size and cranial capacity is relevant both to humans and other animals, and can be done by weight or volume via MRI scans, by skull volume, or by neuroimaging intelligence testing. The relationship between brain size and intelligence remains a controversial although frequently investigated question.
Josiah Clark Nott was an American surgeon, anthropologist and ethnologist. He is known for his studies into the etiology of yellow fever and malaria, including the theory that they are caused by germs, and for his espousal of scientific racism.
Count Georges Vacher de Lapouge was a French anthropologist and a theoretician of eugenics and scientific racism. He is known as the founder of anthroposociology, the anthropological and sociological study of race as a means of establishing the superiority of certain peoples.
In physical anthropology, post-orbital constriction is the narrowing of the cranium (skull) just behind the eye sockets found in most non-human primates and early hominins. This constriction is very noticeable in non-human primates, slightly less so in Australopithecines, even less in Homo erectus and completely disappears in modern Homo sapiens. Post-orbital constriction index in non-human primates and hominin range in category from increased constriction, intermediate, reduced constriction and disappearance. The post-orbital constriction index is defined by either a ratio of minimum frontal breadth (MFB), behind the supraorbital torus, divided by the maximum upper facial breadth (BFM), bifrontomalare temporale, or as the maximum width behind the orbit of the skull.
Cephalometry is the study and measurement of the head, usually the human head, especially by medical imaging such as radiography. Craniometry, the measurement of the cranium (skull), is a large subset of cephalometry. Cephalometry also has a history in phrenology, which is the study of personality and character as well as physiognomy, which is the study of facial features. Cephalometry as applied in a comparative anatomy context informs biological anthropology. In clinical contexts such as dentistry and oral and maxillofacial surgery, cephalometric analysis helps in treatment and research; cephalometric landmarks guide surgeons in planning and operating.
Hamites is the name formerly used for some Northern and Horn of Africa peoples in the context of a now-outdated model of dividing humanity into different races; this was developed originally by Europeans in support of colonialism and slavery. The term was originally borrowed from the Book of Genesis, in which it refers to the descendants of Ham, son of Noah.
Leonard Lieberman was an American anthropology professor at the Central Michigan University for forty years.
Negroid is an obsolete racial grouping of various people indigenous to Africa south of the area which stretched from the southern Sahara desert in the west to the African Great Lakes in the southeast, but also to isolated parts of South and Southeast Asia (Negritos). The term is derived from now-disproven conceptions of race as a biological category.
The history of anthropometry includes its use as an early tool of anthropology, use for identification, use for the purposes of understanding human physical variation in paleoanthropology and in various attempts to correlate physical with racial and psychological traits. At various points in history, certain anthropometrics have been cited by advocates of discrimination and eugenics often as part of novel social movements or based upon pseudoscience.
CranID was created in 1992 by anthropologist Richard Wright of the University of Sydney to infer the probable geographic origin of unknown crania that are found in archaeological, forensic and repatriation cases. Wright created the program to establish uniformity in cranial morphology based on the assumption that there is a high correlation between geographical location and cranial morphology. This was the first standardized program to evaluate the similarity and dissimilarity of cranial morphological characteristics of an unknown cranium and the database.
↑ See Pierre-André Taguieff, La couleur et le sang – Doctrines racistes à la française ("Colour and Blood – doctrines à la française"), Paris, Mille et une nuits, 2002, 203 pages, and La Force du préjugé – Essai sur le racisme et ses doubles, Tel Gallimard, La Découverte, 1987, 644 pages
↑ Wallace, Michele (1992). Black Popular Culture. Seattle: Bay Press. pp.156–157. ISBN978-1-56584-459-9.
↑ "Cultural Biases Reflected in the Hominid Fossil Record" (history), by Joshua Barbach and Craig Byron, 2005, ArchaeologyInfo.com webpage: ArchaeologyInfo-003Archived 16 May 2011 at the Wayback Machine .
1 2 David Hurst Thomas, Skull Wars Kennewick Man, Archaeology, And The Battle For Native American Identity, 2001, pp. 38 – 41
↑ Michael, J. S. (1988). "A New Look at Morton's Craniological Research". Current Anthropology. 29 (2): 349–354. doi:10.1086/203646. S2CID144528631.
↑ Rushton, J. P. (1990). "Race, Brain Size, and Intelligence: A Rejoinder to Cain and Vanderwolf". Personality and Individual Differences. 11 (8): 785–794. doi:10.1016/0191-8869(90)90186-u.
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