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Brachycephalic
Brachycephaly (derived from the Ancient Greek '' βραχύς'', 'short' and '' κεφαλή'', 'head') is the shape of a skull shorter than average in its species. It is perceived as a cosmetically desirable trait in some domesticated dog and cat breeds, notably the pug and Persian, and can be normal or abnormal in other animal species. In humans, brachycephaly can appear both pathologically and non-pathologically as a result of normal human variation. It is particularly common in Mongolians and the Andamanese. In anthropology, human populations have been characterized as either dolichocephalic (long-headed), mesocephalic (moderate-headed), or brachycephalic (short-headed). The usefulness of the cephalic index was questioned by Giuseppe Sergi, who argued that cranial morphology provided a better means to model racial ancestry. When pathological, it is known as flat head syndrome, and it results from premature fusion of the coronal sutures, or from external deformation. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brachycephalic Airway Obstructive Syndrome
Brachycephalic obstructive airway syndrome (BOAS), also known as brachycephalic airway obstructive syndrome (BAOS), brachycephalic airway syndrome (BAS), and brachycephalic syndrome (BS), is a pathological condition affecting brachycephalic, short nosed dogs and cats which can lead to severe respiratory distress. There are four different anatomical abnormalities that contribute to the disease, all of which occur more commonly in brachycephalic breeds: an elongated soft palate, stenotic nares, a hypoplastic trachea, and everted laryngeal saccules (a condition which occurs secondary to the other abnormalities). Because all of these components make it more difficult to breathe in situations of exercise, stress, or heat, an animal with these abnormalities may be unable to take deep or fast enough breaths to blow off carbon dioxide. This leads to distress and further increases respiratory rate and heart rate, creating a vicious cycle that can quickly lead to a life-threatening situatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalic Index
The cephalic index or cranial index is a number obtained by taking the maximum width (biparietal diameter or BPD, side to side) of the head of an organism, multiplying it by 100 and then dividing it by their maximum length (occipitofrontal diameter or OFD, front to back). The index was once used to categorize human beings in the first half of the 20th century, but today it is used to categorize dogs and cats. Historic use in anthropology Early anthropology The cephalic index was used by anthropologists in the early 20th century as a tool to categorize human populations. It was used to describe an individual's appearance and for estimating the age of fetuses for legal and obstetrical reasons. The cephalic index was defined by Sweden, Swedish professor of anatomy Anders Retzius (1796–1860) and first used in physical anthropology to classify ancient human remains found in Europe. The theory became closely associated with the development of racial anthropology in the 19th and ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesocephalic
The cephalic index or cranial index is a number obtained by taking the maximum width ( biparietal diameter or BPD, side to side) of the head of an organism, multiplying it by 100 and then dividing it by their maximum length ( occipitofrontal diameter or OFD, front to back). The index was once used to categorize human beings in the first half of the 20th century, but today it is used to categorize dogs and cats. Historic use in anthropology Early anthropology The cephalic index was used by anthropologists in the early 20th century as a tool to categorize human populations. It was used to describe an individual's appearance and for estimating the age of fetuses for legal and obstetrical reasons. The cephalic index was defined by Swedish professor of anatomy Anders Retzius (1796–1860) and first used in physical anthropology to classify ancient human remains found in Europe. The theory became closely associated with the development of racial anthropology in the 19th and early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalic Index
The cephalic index or cranial index is a number obtained by taking the maximum width (biparietal diameter or BPD, side to side) of the head of an organism, multiplying it by 100 and then dividing it by their maximum length (occipitofrontal diameter or OFD, front to back). The index was once used to categorize human beings in the first half of the 20th century, but today it is used to categorize dogs and cats. Historic use in anthropology Early anthropology The cephalic index was used by anthropologists in the early 20th century as a tool to categorize human populations. It was used to describe an individual's appearance and for estimating the age of fetuses for legal and obstetrical reasons. The cephalic index was defined by Sweden, Swedish professor of anatomy Anders Retzius (1796–1860) and first used in physical anthropology to classify ancient human remains found in Europe. The theory became closely associated with the development of racial anthropology in the 19th and ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulldog
The Bulldog is a British breed of dog of mastiff type. It may also be known as the English Bulldog or British Bulldog. It is a stocky, muscular dog of medium size, with a large head, thick folds of skin around the face and shoulders and a relatively flat face with a protruding lower jaw. Selective breeding for appearance has led to increased susceptibility to health problems including brachycephaly, hip dysplasia, heat sensitivity and skin infections. The dogs may not be bred in Norway or the Netherlands, because of concerns about their quality of life. The modern Bulldog was bred as a companion dog from the Old English Bulldog, a now-extinct breed used for bull-baiting until that was outlawed under the Cruelty to Animals Act of 1835. The Bulldog Club (in England) was formed in 1878, and the Bulldog Club of America was formed in 1890. While often used as a symbol of ferocity and courage, the modern Bulldog is generally a friendly, amiable dog. It is commonly kept as a pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persian (cat)
The Persian cat, also known as the Persian Longhair, is a long-haired breed of cat characterised by a round face and short muzzle. The first documented ancestors of Persian cats might have been imported into Italy from Khorasan as early as around 1620, but this has not been proven. Instead, there is stronger evidence for a longhaired cat breed being exported from Afghanistan and Iran/Persia from the 19th century onwards. Persian cats have been widely recognised by the North-West European cat fancy since the 19th century, and after World War II by breeders from North America, Australia and New Zealand. Some cat fancier organisations' breed standards subsume the Himalayan and Exotic Shorthair as variants of this breed, while others generally treat them as separate breeds. The selective breeding carried out by breeders has allowed the development of a wide variety of coat colours, but has also led to the creation of increasingly flat-faced Persian cats. Favoured by fanciers, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persian Cat
The Persian cat, also known as the Persian Longhair, is a long-haired breed of cat characterised by a round face and short muzzle. The first documented ancestors of Persian cats might have been imported into Italy from Greater Khorasan, Khorasan as early as around 1620, but this has not been proven. Instead, there is stronger evidence for a longhaired cat breed being exported from Afghanistan and Iran, Iran/Persia from the 19th century onwards. Persian cats have been widely recognised by the North-West European Cat culture, cat fancy since the 19th century, and after World War II by breeders from North America, Australia and New Zealand. Some cat fancier organisations' breed standards subsume the Himalayan cat, Himalayan and Exotic Shorthair as variants of this breed, while others generally treat them as separate breeds. The selective breeding carried out by breeders has allowed the development of a wide variety of coat colours, but has also led to the creation of increasingly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exotic Shorthair
The Exotic Shorthair is a breed of cat developed as a short-haired version of the Persian. The Exotic is similar to the Persian in appearance with the exception of the short dense coat. History In the late 1950s, the Persian was used as an outcross by some American Shorthair breeders. This was done in secret in order to improve their body type, and crosses were also made with the Russian Blue and the Burmese. The crossbreed look gained recognition in the show ring, but unhappy American Shorthair breeders successfully produced a new breed standard that would disqualify American Shorthairs that showed signs of crossbreeding. One American Shorthair breeder who saw the potential of the Persian/American Shorthair cross proposed and eventually got the Cat Fanciers' Association judge and American Shorthair breeder Jane Martinke to recognize them as a new breed in 1966, under the name Exotic Shorthair. In 1987, the Cat Fanciers' Association closed the Exotic to shorthair outcross ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Himalayan (cat)
The Himalayan (short for Himalayan Persian, or Colourpoint Persian as it is commonly referred to in Europe), is a breed or sub-breed of long-haired cat similar in type to the Persian, with the exception of its blue eyes and its point colouration, which were derived from crossing the Persian with the Siamese. Some registries may classify the Himalayan as a long-haired sub-breed of Siamese, or a colourpoint sub-breed of Persian. The World Cat Federation has merged them with the Colourpoint Shorthair and Javanese into a single breed, the Colourpoint. History Work to formally establish a breed with combined Persian and Siamese traits, explicitly for the cat fancy, began in the United States in the 1930s at Harvard University, under the term Siamese–Persian, and the results were published in the '' Journal of Heredity'' in 1936, First page is available online at http://jhered.oxfordjournals.org/cgi/pdf_extract/27/9/339/ but were not adopted as a recognised breed by any ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichocephaly
Dolichocephaly (derived from the Ancient Greek δολιχός 'long' and κεφαλή 'head') is a term used to describe a head that is longer than average relative to its width. In humans, scaphocephaly is a form of dolichocephaly. Dolichocephalic dogs (such as the Lurcher or German Shepherd) have elongated noses. This makes them vulnerable to fungal diseases of the nose such as aspergillosis. In humans the anterior–posterior diameter (length) of dolichocephaly head is more than the transverse diameter (width). Dolichocephaly can sometimes be a symptom of Sensenbrenner syndrome, Crouzon syndrome, Sotos syndrome, CMFTD and Marfan syndrome. However, it also occurs non-pathologically as a result of normal variation between human populations. The standards for denoting dolichocephaly are derived from Caucasian anatomy norms, and thus describing dolichocephaly as a medical condition may not reflect the diversity in different human populations. In anthropology, human population ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
