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Quadrupedalism is a form of locomotion where animals have four legs that are used to bear weight and move around. An animal or machine that usually maintains a four-legged posture and moves using all four legs is said to be a quadruped (from Latin quattuor for "four", and pes , pedis for "foot").
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]
They are also mildly intellectually disabled and have problems in balancing on two legs. However, they do not show the poor coordination of hands, speech, and eye movements often found in cerebellar ataxia. The four sisters can do needlework. They all share a recessive mutation on chromosome 17p. [3]
It was an obligate quadruped (it could only walk on four legs) and had a tall, curved skull with large teeth of different sizes set along the jaws. Most fossils have been found in the Southwestern United States , the majority of these coming from a geological deposit called the Red Beds of Texas and Oklahoma .
An olive baboon transitioning from walking on four legs to two at the primatology station of the CNRS, in France (Gilles Berillon/Francois Druelle/Journal of Experimental Biology)
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
Some babies skip crawling and go directly to walking. Others "bottom shuffle" instead of crawling (sometimes referred to as "bum-shuffling", or "scooting"). Bottom-shuffling babies sit on their bottoms and push themselves forward using their legs, and sometimes their hands, often in specially reinforced trousers.
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