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Uner Tan syndrome
Uner Tan syndrome, Unertan syndrome or UTS is a syndrome proposed by the Turkish evolutionary biologist Üner Tan. According to Tan, persons affected by this syndrome walk with a quadrupedal locomotion and are afflicted with "primitive" speech and severe mental retardation. Tan postulated that this is an example of "backward evolution". The proposed syndrome was featured in the 2006 BBC2 documentary ''The Family That Walks On All Fours''.
==Cases==
The Ulaş family of nineteen from rural southern Turkey has been the primary example of the proposed syndrome. Tan described five members as walking with a quadrupedal gait using their feet and the palms of their hands. In infants, where this is a rare but a normal stage prior and sometimes following bipedal walking, such a gait is called "bear crawl". The affected family members are also severely mentally retarded and their speech is affected. Tan proposed that these are symptoms of Uner Tan syndrome.〔
In January 2008, Tan reported on another family (four males and two females) located in southern Turkey.
Four other unrelated cases in families are described as having various degrees of UTS.〔 Males may be affected more than females. It is also claimed that some individuals are unaware of time, lack language, have severe mental retardation with no conscious experience, and communicate by using sounds. Two males are unable to stand up, while in other cases, can stand up but cannot make a step when standing. Less severe cases use toe walking, which is a normal phase in child gait development.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Uner Tan syndrome」の詳細全文を読む
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