What is a hitchhiker thumb

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The thumb is the first digit finger of the hand. When a person is standing in the medical anatomical position where the palm is facing to the frontthe thumb is the outermost digit. The Medical Latin English noun for thumb is pollex compare hallux for big toeand the corresponding adjective for thumb is pollical.

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I can bend my thumb both forwards and backward by ninety degrees. Over the years, I've grown to love my hitchhiker's thumb. I started taking piano lessons when I was six years old.

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It's Metafilter's 20th anniversary! To celebrate, scan some cats or help fund Mefi! What is the origin of the hitchhiker's thumb?

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Learn something new every day More Info Someone who has a thumb which bends backward when extended is said to have a hitchhiker's thumb. This is a genetic trait, and it does not interfere with the thumb's normal functions.

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Although no one else in my family that I know of has these types of thumbs and I'd wondered about it, I didn't know this phenomenon had a name until I read about it here at wikipedia after I happened to come across the article on Mendelian traits. Any user may perform this transfer; refer to Wikipedia:Moving files to Commons for details. If this file has problems with attributioncopyrightor is otherwise ineligible for Commons, then remove this tag and DO NOT transfer it; repeat violators may be blocked from editing.

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Hitchhiker's Thumb - Curse or Gift? Feb 14, 1. Jan 14, Chicago.

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It is used to both describe the appearance of the thumb on physical examination and also the corresponding radiographic appearance. It is similar to how a person would normally angulate and hold out the thumb with the intention to hitchhike. The sign is also used in obstetric ultrasound and on pediatric radiographs to describe the appearance of the fingers in diatrophic dysplasia.

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It is also known as distal hyperextensibility 1. The thumb consists of a distal joint which keep the thumb in a straight line. Normally, our bodies contain genes that are responsible for the size, color and shape of an individual.

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However, a study found that Of those subjects, In that study,

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Asparagus urine. Some people have "hitchhiker's thumbs," which bend backwards with a large angle between the two segments phalanges. The myth is that there are just two kinds of thumbs, straight thumbs S and hitchhiker's thumbs Hand the trait is controlled by a single gene with two alleles, with the allele for S being dominant.

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