Joint hypermobility (JH) may be the extreme of normal range of motion or one condition in the polygenic group of inherited disorders of connective tissue. It is found in about 40% of the population depending on which variables are used for its classification. It may be associated with musculoskeletal and extra skeletal disorders in which case it is called Ehlers-Danlos Syndrome-hypermobility type.
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Neuseli Marino Lamari (2016) studied this question.
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