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Robinson (1913) [3] suggests that the demand to resist masticatory stresses triggered bone thickening in the mental region of the mandible and ultimately formed a prominent chin. Moreover, Daegling (1993) [4] explains the chin as a functional adaptation to resist masticatory stress that causes vertical bending stresses in the coronal plane.
In the case of mandibular prognathism (never maxillary prognathism) this is often also referred to as Habsburg chin, Habsburg's chin, Habsburg jaw or Habsburg's jaw [2] [3] especially when referenced with context of its prevalence amongst historical members of the House of Habsburg.
Archaic humans are distinguished from anatomically modern humans by having a thick skull, prominent supraorbital ridges (brow ridges) and the lack of a prominent chin. [11] [12] Anatomically modern humans appeared around 300,000 years ago in Africa, [4] [5] [6] and 70,000 years ago gradually supplanted the "archaic" human varieties.
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.
The Neanderthal chin and forehead sloped backwards and the nose region protruded forward more than in modern humans. The common shapes of the nose are not known but it was more protrusive and large than modern humans especially in the passageways, so Neanderthals could use energy much more efficiently than modern humans. [ 9 ]
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. There's A Reason You Have Chin Hair And ...
The size and shape of the bones making up this structure are responsible for the size and shape of a person's chin. Synonyms of mental protuberance include mental process and protuberantia mentalis. Mental in this sense derives from Latin mentum (chin), not mens (mind), source of the more common meaning of mental.
The simian shelf found in chimpanzees is not found in modern humans. It was found in a study that the human chin has no true purpose because the simian shelf in chimpanzees is to protect the jaw from the stress of eating and/or chewing. [7] The human speech mechanism also played a role in the evolution or disappearance of the simian shelf.