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Irritable Male Syndrome
Irritable male syndrome (IMS) is an annual behavior pattern that has been described in Soay sheep and other mammals with a strictly seasonal breeding pattern and described in a 2002 literature review of animal behavior by Lincoln A. Gerald. IMS is a striking feature in mammals with seasonal breeding patterns; it manifests at the end of the mating season. The term has been adapted to refer to disagreeability observed in aged human males. Characteristics Soay sheep mate for five weeks during November and December each year, and give birth five months later in the spring. The rams' testosterone levels soar during the late autumn mating season. In the winter, testosterone levels fall and they stop mating. As their testosterone levels fall, the rams become more nervous and withdrawn, striking out irrationally. The term covers symptoms thought to be caused by a drop in testosterone levels in male mammals. Similar behaviors have been observed in red deer, reindeer, and Indian el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horned Soay Ram Close-up
A horn is a permanent pointed projection on the head of various animals that consists of a covering of keratin and other proteins surrounding a core of live bone. Horns are distinct from antlers, which are not permanent. In mammals, true horns are found mainly among the ruminant artiodactyls, in the families Antilocapridae ( pronghorn) and Bovidae ( cattle, goats, antelope etc.). Cattle horns arise from subcutaneous connective tissue (under the scalp) and later fuse to the underlying frontal bone. One pair of horns is usual; however, two or more pairs occur in a few wild species and in some domesticated breeds of sheep. Polycerate (multi-horned) sheep breeds include the Hebridean, Icelandic, Jacob, Manx Loaghtan, and the Navajo-Churro. Horns usually have a curved or spiral shape, often with ridges or fluting. In many species, only males have horns. Horns start to grow soon after birth and continue to grow throughout the life of the animal (except in pronghorns, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syndromes In Mammals
A syndrome is a set of medical signs and symptoms which are correlated with each other and often associated with a particular disease or disorder. The word derives from the Greek language, Greek σύνδρομον, meaning "concurrence". When a syndrome is paired with a definite cause this becomes a disease. In some instances, a syndrome is so closely linked with a pathogenesis or cause that disease#Terminology, the words ''syndrome'', ''disease'', and ''disorder'' end up being used interchangeably for them. This substitution of terminology often confuses the reality and meaning of medical diagnoses. This is especially true of heredity, inherited syndromes. About one third of all phenotypes that are listed in Online Mendelian Inheritance in Man, OMIM are described as dysmorphic, which usually refers to the facial gestalt. For example, Down syndrome, Wolf–Hirschhorn syndrome, and Andersen–Tawil syndrome are disorders with known pathogeneses, so each is more than just a set of sig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unnecessary Health Care
Unnecessary health care (overutilization, overuse, or overtreatment) is health care provided with a higher volume or cost than is appropriate. In the United States, where health care costs are the highest as a percentage of GDP, overuse was the predominant factor in its expense, accounting for about a third of its health care spending ($750 billion out of $2.6 trillion) in 2012. Factors that drive overuse include paying health professionals more to do more ( fee-for-service), defensive medicine to protect against litigiousness, and insulation from price sensitivity in instances where the consumer is not the payer—the patient receives goods and services but insurance pays for them (whether public insurance, private, or both). Such factors leave many actors in the system (doctors, patients, pharmaceutical companies, device manufacturers) with inadequate incentive to restrain health care prices or overuse. This drives payers, such as national health insurance systems or the U. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overdiagnosed
Overdiagnosis is the diagnosis of disease that will never cause symptoms or death during a patient's ordinarily expected lifetime and thus presents no practical threat regardless of being pathologic. Overdiagnosis is a side effect of screening for early forms of disease. Although screening saves lives in some cases, in others it may turn people into patients unnecessarily and may lead to treatments that do no good and perhaps do harm. Given the tremendous variability that is normal in biology, it is inherent that the more one screens, the more incidental findings will generally be found. For a large percentage of them, the most appropriate medical response is to recognize them as something that does not require intervention; but determining which action a particular finding warrants ("ignoring", watchful waiting, or intervention) can be very difficult, whether because the differential diagnosis is uncertain or because the risk ratio is uncertain (risks posed by intervention, namel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late-onset Hypogonadism
Late-onset hypogonadism (LOH) or testosterone deficiency syndrome (TDS) is a condition in older men characterized by measurably low testosterone levels and clinical symptoms mostly of a sexual nature, including decreased desire for sex, fewer spontaneous erections, and erectile dysfunction. It is the result of a gradual drop in testosterone; a steady decline in testosterone levels of about 1% per year can happen and is well documented in both men and women. Signs and symptoms Some men present with the symptoms, but with normal testosterone levels, and some men with low testosterone levels have no symptoms; the reasons for this are not known. Some men in their late 40s and early 50s develop depression, loss of libido, erectile dysfunction, and other physical and emotional symptoms such as irritability, loss of muscle mass and reduced ability to exercise, weight gain, lack of energy, difficulty sleeping, or poor concentration; many of these symptoms may arise from a midlife crisis o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dietary Supplement
A dietary supplement is a manufactured product intended to supplement one's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources or that are synthetic in order to increase the quantity of their consumption. The class of nutrient compounds includes vitamins, minerals, fiber, fatty acids, and amino acids. Dietary supplements can also contain substances that have not been confirmed as being essential to life, but are marketed as having a beneficial biological effect, such as plant pigments or polyphenols. Animals can also be a source of supplement ingredients, such as collagen from chickens or fish for example. These are also sold individually and in combination, and may be combined with nutrient ingredients. The European Commission has also established harmonized rules to help insure that food supplements are safe and appropriately labeled. Creating an industry estimated to have a 2020 value of $ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of The American Geriatrics Society
Journal of the American Geriatrics Society is a peer-reviewed journal of the American Geriatrics Society The American Geriatrics Society (AGS) is a non-profit professional society founded on June 11, 1942, for health care professionals practicing geriatric medicine. Among the founding physicians were Dr. Ignatz Leo Nascher, who coined the term "ge .... References External links Website Wiley-Blackwell academic journals English-language journals Publications established in 2001 Academic journals associated with learned and professional societies of the United States Gerontology journals {{med-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menopause
Menopause, also known as the climacteric, is the time in women's lives when menstrual periods stop permanently, and they are no longer able to bear children. Menopause usually occurs between the age of 47 and 54. Medical professionals often define menopause as having occurred when a woman has not had any menstrual bleeding for a year. It may also be defined by a decrease in hormone production by the ovaries. In those who have had surgery to remove their uterus but still have functioning ovaries, menopause is not considered to have yet occurred. Following the removal of the uterus, symptoms typically occur earlier. In the years before menopause, a woman's periods typically become irregular, which means that periods may be longer or shorter in duration or be lighter or heavier in the amount of flow. During this time, women often experience hot flashes; these typically last from 30 seconds to ten minutes and may be associated with shivering, sweating, and reddening of the skin. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Elephants
The Indian elephant (''Elephas maximus indicus'') is one of four extant recognised subspecies of the Asian elephant and native to mainland Asia. Since 1986, the Asian elephant has been listed as Endangered on the IUCN Red List as the wild population has declined by at least 50% since the 1930s to 1940s, i.e. three elephant generations. The Asian elephant is threatened by habitat loss, degradation and fragmentation. Characteristics In general, Asian elephants are smaller than African elephants and have the highest body point on the head. The tip of their trunk has one finger-like process. Their back is convex or level. Indian elephants reach a shoulder height of between , weigh between , and have 19 pairs of ribs. Their skin colour is lighter than that of '' E. m. maximus'' with smaller patches of depigmentation, but darker than that of '' E. m. sumatranus''. Females are usually smaller than males, and have short or no tusks. The largest Indian elephant was high at the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soay Sheep
The Soay sheep is a breed of domestic sheep (''Ovis aries'') descended from a population of feral sheep on the island of Soay in the St Kilda Archipelago, about from the Western Isles of Scotland. It is one of the Northern European short-tailed sheep breeds. It remains physically similar to the wild ancestors of domestic sheep, the Mediterranean mouflon and the horned urial sheep of Central Asia.Ryder, M L, (1981), "A survey of European primitive breeds of sheep", ''Ann. Génét. Sél. Anim.'', 13 (4), pp 381–418. It is much smaller than modern domesticated sheep but hardier, and is extraordinarily agile, tending to take refuge amongst the cliffs when frightened. Soays may be solid black or brown, or mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reindeer
Reindeer (in North American English, known as caribou if wild and ''reindeer'' if domesticated) are deer in the genus ''Rangifer''. For the last few decades, reindeer were assigned to one species, ''Rangifer tarandus'', with about 10 subspecies. A 2022 revision of the genus elevated five of the subspecies to species (see Taxonomy below). They have a circumpolar distribution and are native to the Arctic, sub-Arctic, tundra, boreal forest, and mountainous regions of northern Europe, Siberia, and North America. Reindeer occur in both migratory and sedentary populations, and their herd sizes vary greatly in different regions. The tundra subspecies are adapted for extreme cold, and some are adapted for long-distance migration. Reindeer vary greatly in size and color from the smallest species, the Svalbard reindeer (''R. t. platyrhynchus''), to the largest subspecies, Osborn's caribou (''R. t. osborni''). Although reindeer are quite numerous, some species and subspecies are in d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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