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A double chin is a loss of definition of the jawbone or soft tissue under the chin. There are two possible causes for a double chin, which have to be differentiated. In overweight people, commonly the layer of subcutaneous fat around the neck sags down and creates a wrinkle , creating the appearance of a second chin.
Changes to the dental morphology and jaw are major elements of hominid evolution. These changes were driven by the types and processing of food eaten. The evolution of the jaw is thought to have facilitated encephalization, speech, and the formation of the uniquely human chin.
Neanderthal teeth have a morphology that is a specifically derived trait in their species. Neanderthals have a distinct dental morphology that is unique compared to the dental frequency patterns of Homo sapiens. [28] Also, the Neanderthal mandibular has characteristics that are different from those of Homo sapiens.
Shovel-shaped dental characteristics are also observed in Homo erectus like the Peking Man and in Neanderthals, although the morphology of these shoveled incisors is distinct from the modern human form of shoveling.
Hormones, PCOS, and hirsutism may cause chin hair in women. Doctors share potential causes and how to remove chin hair through tweezing, waxing, and more.
The primary cause of the above two abnormalities in adolescents is due to accelerated and slow mandibular growth. Resulting in either a longer lower face height appearance (vertical growth) or a shorter one (horizontal growth). The length between the columella (base of the nose) and menton (base of the chin) is the variable measurement.
One potential culprit of chin hair is polycystic ovary syndrome (PCOS), which impacts around 8 to 13% of women of child-bearing age. With PCOS, women may not ovulate regularly, which means ...
The blackchin tilapia, is pale in colour, that colour varying in shades including light blue, orange and golden yellow which normally has dark patches on the chin of adults. It also normally has dark colouration on the posterior edge of the gill and on the tips of the soft rays of the dorsal fin. The body is typically marked with irregular bars ...