Endocannibalism is a practice of cannibalism in one's own locality or community. [1] In most cases this refers to the consumption of the remains of the deceased in a mortuary context. [2]
Herodotus (3.38) mentions funerary cannibalism among the Callatiae, a tribe of India.
It is believed that some South American indigenous cultures, such as the Mayoruna people, practiced endocannibalism in the past. [3] The Amahuaca Indians of Peru picked particles of bone out of the ashes of a cremation fire, ground them with corn, and drank them as a kind of gruel. [4] For the Wari' people in western Brazil, endocannibalism was an act of compassion where the roasted remains of fellow Wari' were consumed in a mortuary setting; [5] ideally, the affines (relatives by marriage) would consume the entire corpse, and rejecting the practice would be offensive to the direct family members. [5] Ya̧nomamö consumed the ground-up bones and ashes of cremated kinsmen in an act of mourning; this is still classified as endocannibalism, although, strictly speaking, "flesh" is not eaten. [6] Such practices were generally not believed to have been driven by need for protein or other food. [3]
Kuru is a type of transmissible spongiform encephalopathy (TSE) caused by prions that are found in humans. [7] Human prion diseases come in sporadic, genetic and infectious forms. Kuru was the first infectious human prion disease discovered. [8] It spread through the Fore people of Papua New Guinea, among whom relatives consumed the bodies of the deceased to return the "life force" of the deceased to the hamlet. [9] Kuru was 8 to 9 times more prevalent in women and children than in men at its peak because, while the men of the village consumed muscle tissues, the women and children would eat the rest of the body, including the brain, where the prion particles were particularly concentrated. [10] Historical research suggests the kuru epidemic may have originated around 1900 from a single individual who lived on the edge of Fore territory, and who is thought to have spontaneously developed some form of Creutzfeldt–Jakob disease, a related prion disease. Oral history records that cannibalism began within the Fore in the late 19th century. Research at University College London identified a gene that protects against prion diseases by studying the Fore people. [11]
Currently there is no treatment to cure or even control kuru, but there are numerous programs being funded by universities and national institutes, such as the National Institute of Neurological Disorders and Stroke (NINDS). This institute is currently funding research into the genetic and cellular process behind the development and transmission of kuru and other TSE diseases. [12]
Whether or not endocannibalism was commonplace through much of human prehistory remains controversial.
A team led by Michael Alpers, a lifelong investigator of kuru, [13] found genes that protect against similar prion diseases were widespread, suggesting that such endocannibalism could have once been common around the world. [14] [15]
A genetic study with a range of authors published by the University College London in 2009 declared evidence of a "powerful episode" of natural selection in recent humans. This evidence is found in the 127V polymorphism, a mutation which protects against the kuru disease. In simpler terms, it would appear the kuru disease has affected all humans to the extent we have a specialised immune response to it. [16] However, a study drawing from hundreds of resources in 2013 claims further that 127V derives from an ancient and widespread cannibalistic practice, not related to kuru specifically, but "kuru-like epidemics" which appeared around the time of the extinction of the Neanderthals who co-existed with humans. This allows the suggestion that cannibalistic practises may have caused diseases which killed the neanderthals, but not the humans because of the 127V resistance gene. [17]
Cro-Magnons associated with the Magdalenian culture in the European late Upper Palaeolithic (~23-14,000 years ago) are suggested to have practiced funerary endocannibalism. [18]
Creutzfeldt–Jakob disease (CJD), also known as subacute spongiform encephalopathy or neurocognitive disorder due to prion disease, is a fatal neurodegenerative disease. Early symptoms include memory problems, behavioral changes, poor coordination, and visual disturbances. Later symptoms include dementia, involuntary movements, blindness, weakness, and coma. About 70% of people die within a year of diagnosis. The name "Creutzfeldt–Jakob disease" was introduced by Walther Spielmeyer in 1922, after the German neurologists Hans Gerhard Creutzfeldt and Alfons Maria Jakob.
Human cannibalism is the act or practice of humans eating the flesh or internal organs of other human beings. A person who practices cannibalism is called a cannibal. The meaning of "cannibalism" has been extended into zoology to describe animals consuming parts of individuals of the same species as food.
A prion is a misfolded protein that induces misfolding in normal variants of the same protein, leading to cellular death. Prions are responsible for prion diseases, known as transmissible spongiform encephalopathies (TSEs), which are fatal and transmissible neurodegenerative diseases affecting both humans and animals. These proteins can misfold sporadically, due to genetic mutations, or by exposure to an already misfolded protein, leading to an abnormal three-dimensional structure that can propagate misfolding in other proteins.
Scrapie is a fatal, degenerative disease affecting the nervous systems of sheep and goats. It is one of several transmissible spongiform encephalopathies (TSEs), and as such it is thought to be caused by a prion. Scrapie has been known since at least 1732 and does not appear to be transmissible to humans. However, it has been found to be experimentally transmissible to humanised transgenic mice and non-human primates.
Transmissible spongiform encephalopathies (TSEs), also known as prion diseases, are a group of progressive, incurable, and fatal conditions that are associated with prions and affect the brain and nervous system of many animals, including humans, cattle, and sheep. According to the most widespread hypothesis, they are transmitted by prions, though some other data suggest an involvement of a Spiroplasma infection. Mental and physical abilities deteriorate and many tiny holes appear in the cortex causing it to appear like a sponge when brain tissue obtained at autopsy is examined under a microscope. The disorders cause impairment of brain function which may result in memory loss, personality changes, and abnormal or impaired movement which worsen over time.
Daniel Carleton Gajdusek was an American physician and medical researcher who was the co-recipient of the Nobel Prize in Physiology or Medicine in 1976 for work on the transmissibility of kuru, implying the existence of an infectious agent, which he named an 'unconventional virus'. In 1996, Gajdusek was charged with child molestation and, after being convicted, spent 12 months in prison before entering a self-imposed exile in Europe, where he died a decade later.
The Fore people live in the Okapa District of the Eastern Highlands Province, Papua New Guinea. There are approximately 20,000 Fore who are separated by the Wanevinti Mountains into the North Fore and South Fore regions. Their main form of subsistence is slash-and-burn farming. The Fore language has three distinct dialects and is the southernmost member of the East Central Family, East New Guinea Highlands Stock, Trans–New Guinea phylum of Papuan languages.
Gerstmann–Sträussler–Scheinker syndrome (GSS) is an extremely rare, always fatal neurodegenerative disease that affects patients from 20 to 60 years in age. It is exclusively heritable, and is found in only a few families all over the world. It is, however, classified with the transmissible spongiform encephalopathies (TSE) due to the causative role played by PRNP, the human prion protein. GSS was first reported by the Austrian physicians Josef Gerstmann, Ernst Sträussler and Ilya Scheinker in 1936.
The major prion protein (PrP) is encoded in the human body by the PRNP gene also known as CD230. Expression of the protein is most predominant in the nervous system but occurs in many other tissues throughout the body.
Cannibalism is the act of consuming another individual of the same species as food. Cannibalism is a common ecological interaction in the animal kingdom and has been recorded in more than 1,500 species. Human cannibalism is also well documented, both in ancient and in recent times.
Laura Manuelidis is a physician and neuropathologist at Yale University.
Variant Creutzfeldt–Jakob disease (vCJD), formerly known as New variant Creutzfeldt–Jakob disease (nvCJD) and referred to colloquially as "mad cow disease" or "human mad cow disease" to distinguish it from its BSE counterpart, is a fatal type of brain disease within the transmissible spongiform encephalopathy family. Initial symptoms include psychiatric problems, behavioral changes, and painful sensations. In the later stages of the illness, patients may exhibit poor coordination, dementia and involuntary movements. The length of time between exposure and the development of symptoms is unclear, but is believed to be years to decades. Average life expectancy following the onset of symptoms is 13 months.
Exocannibalism, as opposed to endocannibalism, is the consumption of flesh from humans that do not belong to one's close social group—for example, eating one's enemies. It has been interpreted as an attempt to acquire desired qualities of the victim and as "ultimate form of humiliation and domination" of a vanquished enemy in warfare. Such practices have been documented in various cultures, including the Aztecs in Mexico and the Caribs and Tupinambá in South America.
Kuru is a rare, incurable, and fatal neurodegenerative disorder that was formerly common among the Fore people of Papua New Guinea. Kuru is a form of prion disease which leads to tremors and loss of coordination from neurodegeneration.
Bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, is an incurable and invariably fatal neurodegenerative disease of cattle. Symptoms include abnormal behavior, trouble walking, and weight loss. Later in the course of the disease, the cow becomes unable to function normally. There is conflicting information about the time between infection and onset of symptoms. In 2002, the World Health Organization suggested it to be approximately four to five years. Time from onset of symptoms to death is generally weeks to months. Spread to humans is believed to result in variant Creutzfeldt–Jakob disease (vCJD). As of 2018, a total of 231 cases of vCJD had been reported globally.
The brain, like most other internal organs, or offal, can serve as nourishment. Brains used for nourishment include those of pigs, squirrels, rabbits, horses, cattle, monkeys, chickens, camels, fish, lamb, and goats. In many cultures, different types of brain are considered a delicacy.
The National Prion Clinic (UK) is part of the University College London Hospitals NHS Foundation Trust. Its aim is to diagnose and treat patients with any form of human prion disease (Creutzfeldt-Jakob disease, CJD). In addition, the clinic facilitates research in diagnostics and therapeutics, organises clinical trials, and counsels those with an increased genetic risk of the disease.
Shirley Inglis Lindenbaum is an Australian anthropologist notable for her medical anthropology work on kuru in Papua New Guinea, HIV/AIDS in the United States of America, and cholera in Bangladesh.
Recent human evolution refers to evolutionary adaptation, sexual and natural selection, and genetic drift within Homo sapiens populations, since their separation and dispersal in the Middle Paleolithic about 50,000 years ago. Contrary to popular belief, not only are humans still evolving, their evolution since the dawn of agriculture is faster than ever before. It has been proposed that human culture acts as a selective force in human evolution and has accelerated it; however, this is disputed. With a sufficiently large data set and modern research methods, scientists can study the changes in the frequency of an allele occurring in a tiny subset of the population over a single lifetime, the shortest meaningful time scale in evolution. Comparing a given gene with that of other species enables geneticists to determine whether it is rapidly evolving in humans alone. For example, while human DNA is on average 98% identical to chimp DNA, the so-called Human Accelerated Region 1 (HAR1), involved in the development of the brain, is only 85% similar.
Michael Coulthart is a Canadian microbiologist who is employed as the head of the Canadian Creutzfeldt–Jakob Disease Surveillance System (CJDSS) within the Public Health Agency of Canada (PHAC), which terms CJD a zoonotic and infectious disease. In 2006, a working group named "classic CJD" as well as Variant Creutzfeldt–Jakob disease as two notifiable diseases. It is unknown whether PHAC tracks in an official capacity other transmissible spongiform encephalopathies (TSE), but Coulthart is on the Advisory Committee of the Center for Infectious Disease Research and Policy for Chronic Wasting Disease of cervidae.