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The Family That Walks on All Fours is a BBC Two documentary that explored the science and the story of five individuals in the Ulas family, a Kurdish family in Southeastern Turkey that walk with a previously unreported quadruped gait. [1] [2] [3]
Quadrupedalism is sometimes referred to as being "on all fours", and is observed in crawling, especially by infants. [1] In the 20th century quadrupedal movement was popularized as a form of physical exercise by Georges Hebert. [2] Kenichi Ito is a Japanese man famous for speed running on four limbs in competitions. [3]
Five of the family members (except for another, who has died) walk on all fours with their feet and the palms of their hands in what is called a "bear crawl". [1] [2] Their quadrupedal gait has never been reported in anatomically intact adult humans. The gait is different from the knuckle-walking quadrupedal gait of apes.
Five members of one family walk on all fours, leading one scientist to say their condition signals backwards evolution. Other scientists have a different take.
Uner Tan syndrome has been linked to intrafamilial marriage and reproduction, which suggests that it is an autosomal recessive disorder. [3] The syndrome's main characteristic is habitual quadrupedalism, meaning they can stand up straight until they try to move, then they walk on their hands and knees.
[2] [8] This form of hand-walking posture allows these tree-climbers to use their hands for terrestrial locomotion while retaining long fingers for gripping and climbing. It may also allow small objects to be carried in the fingers while walking on all fours. This is the most common type of movement for gorillas, although they also practice ...
A facultative biped is an animal that is capable of walking or running on two legs , as a response to exceptional circumstances (facultative), while normally walking or running on four limbs or more. [1] In contrast, obligate bipedalism is where walking or running on
In addition to the lithotomy position still commonly used by many obstetricians, childbirth positions that are successfully used by midwives and traditional birth-attendants the world over include squatting, standing, kneeling, and on all fours, often in a sequence. [3]