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Hitchhiker's thumb; Other names: Distal hyperextensibility of the thumb, thumb hypermobility, Z-shaped deformity, [1] duck-bill thumb [2] Example of bilateral hitchhiker's thumb: Specialty: Medical genetics: Symptoms: A thumb that can bend backwards at more than a 90° degree angle: Complications: If it presents as an isolated trait, none ...
Hypermobility, also known as double-jointedness, describes joints that stretch farther than normal. [2] For example, some hypermobile people can bend their thumbs backwards to their wrists and bend their knee joints backwards, put their leg behind the head or perform other contortionist "tricks".
Abbrev. [1]Meaning [1] Latin (or Neo-Latin) origin [1]; a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte ...
Pronunciation follows convention outside the medical field, in which acronyms are generally pronounced as if they were a word (JAMA, SIDS), initialisms are generally pronounced as individual letters (DNA, SSRI), and abbreviations generally use the expansion (soln. = "solution", sup. = "superior").
Double jointedness is another laymans term for hypermobility. "Hitchhikers Thumb" should be a sidenote in this article as it's simply an obvious form of hypermobility. Most people with bilateral hypermobility of the thumbs will exhibit hypermobility throughout their body. --Nukes4Tots 16:28, 28 October 2008 (UTC)
Furthermore, they classically present with scoliosis (progressive curvature of the spine) and unusually positioned thumbs (hitchhiker's thumbs). Around half of infants with diastrophic dysplasia are born with an opening in the roof of the mouth called a cleft palate .
The thumb is the first digit of the hand, next to the index finger. [A] When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb is pollex (compare hallux for big toe), and the corresponding adjective for thumb is pollical.
The condition is known by numerous names including clubbed thumb or club thumb. [ 10 ] [ 11 ] American researcher R.A. Hefner used the terms "short thumb" and "brachymegalodactylism" in 1924, [ 3 ] and "short thumb" has continued to be used in a few other studies since then, including the study that defined Rubinstein–Taybi syndrome in 1963 ...