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Neoteny in humans is further indicated by the limbs and body posture, with the limbs proportionately short compared to torso length; [2] longer leg than arm length; [6] the structure of the foot; [1] and the upright stance. [7] [8] Humans also retain a plasticity of behavior that is generally found among animals only in the young. The emphasis ...
Neoteny in humans is the slowing or delaying of body development, compared to non-human primates, resulting in features such as a large head, a flat face, and relatively short arms. These neotenic changes may have been brought about by sexual selection in human evolution .
Steven J. Gould discussed the presentation of neoteny with "terminal additions" in humans. [8] Neoteny is defined as the delayed or slowed development in humans when compared with their non-human primate counterparts. The "terminal additions" were extensions or reductions in the rate and scope of stages of development and growth.
Several heterochronies have been described in humans, relative to the chimpanzee. In chimpanzee fetuses, brain and head growth starts at about the same developmental stage and grow at a rate similar to that of humans, but growth stops soon after birth, whereas humans continue brain and head growth several years after birth. This particular type ...
Sexual selection is quite different in non-human animals than humans as they feel more of the evolutionary pressures to reproduce and can easily reject a mate. [2] The role of sexual selection in human evolution has not been firmly established although neoteny has been cited as being caused by human sexual selection. [ 3 ]
One textbook example of heterotopy in animals, a classic in genetics and developmental biology, is the experimental induction of legs in place of antennae in fruit flies, Drosophila. The name for this specific induction is 'antennapedia'.
Neotenic complex syndrome (NCS) is a syndrome that presents as an extreme form of developmental delay, with the defining characteristic being neoteny of the patient. It was named in 2017 by Dr. Richard F. Walker, who discovered several genes implicated in the syndrome.
Lodewijk 'Louis' Bolk (10 December 1866, Overschie – 17 June 1930, Amsterdam) was a Dutch anatomist who created the fetalization theory about the human body. [1] It states that when a human being is born, it is still a fetus , as can be seen by its (proportionally) big head, lack of coordination, and helplessness.