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.
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.
Hitchhiker's Thumb - Curse or Gift? Feb 14, 1. Jan 14, Chicago. When I fret, I notice that a lot of the time i am stretching my thumb to the 90 deg angle, and keeping it there when I slightly shift my hand a bit to stretch.
The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits. A corresponding digit in other animals, especially primates. Also called pollex.
By TimJune 8, in Early Posts - - I was wondering if anyone out there who plays violin or viola has hitchhiker's thumb? A double-jointed thumb where the thumb can be bent back quite a ways voluntarily.
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.
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. This was proposed by Glass and Kistler and has been the subject of very little research since then.
Content Benchmark L. Students know heredity is the passage of genetic instructions from one generation to the next generation. Inside almost every cell of every living thing is the blueprint for building that organism.