hitchhiker's thumb myths

To see if you have a hitchhiker's thumb, make a fist and extend your thu… Vanishing hitchhikers have been around, it seems, for centuries. Our website services, content, and products are for informational purposes only. Statistics Darwin’s Theory of Natural Selection Conflicting information The graph vs. wiki & ask & Cha Cha 25% less common There is no particular advantage or disadvantage of having a hitchhiker's thumb Hitchhiker's Thumb Does it help with texting? This finger often…. The bendy thumb gene comprises of multiple alleles in the chromosomes. A disorder that affects connective tissue, joint hypermobility spectrum disorder results in extremely flexible joints in multiple areas of the body, possibly including the thumbs. © 2005-2021 Healthline Media a Red Ventures Company. People with hitchhiker’s thumb have distal joints that can bend back as far as 90 degrees. Ehlers-Danlos syndrome affects the body's connective tissues. Data for right thumbs for males and females combined (Glass and Kistler 1953). forever.charmed. An extension to the Advanced RISC Machine architecture, announced on 06 March 1995 by Advanced RISC Machines Ltd. By identifying the critical subset of the ARM instruction set and encoding it into 16 bits, ARM has succeeded in reducing typical program size by 30-40% from ARM's already excellent code density. Thumbs Up, Then And Now: Hitchhiking Stories From The Road Hitching a ride at the side of the road used to be a common practice, but now it's rarely heard of. As you can see, there's a range of thumb angles, from straight to nearly 90 degrees, with no clear division between hitchhiker and non-hitchhiker thumbs. (1960): If the myth were true, two parents with hitchhiker's thumb could not have a child with a straight thumb. But in others, you will…, The distal phalanges are one of three types of finger bones. Problems with Hitchhiker’s Thumb I’ve been practicing Chopin’s Etude Op. This study will look into four human traits used in a majority of Mendelian human trait activities (Attached Earlobes, Cleft Chin, Hitchhiker's Thumb, Tongue Rolling) and conclude whether or not the teaching methods in biology classes needs to be changed. Hitchhiker's thumbs are those that can bend backwards with a large angle between the two phalanges. The story is found across the world, with many variations. The large expensive cars seldom stopped. In conjunction with the shoulder joint and wrist, the elbow gives the arm much of its versatility…, The index finger is the second digit of the hand. Learn more. The Hitchhikers Guide to Parenteral Nutrition. In most people, the distal joint of the thumb allows the thumb to straighten and to bend forward (toward the palm of the hand). It has been suggested that the variation is an autosomal recessive trait, called a "Hitchhiker's thumb", with homozygous carriers having an angle close to 90°. The single individual who didn't fit this model (the S offspring of two H parents) was explained as an example of incomplete penetrance, meaning that other genes or non-genetic factors also influence the trait. My very bendy hitchhikers thumb. WoopCrack at the end. Some people have "hitchhiker's thumbs," which bend backwards with a large angle between the two segments (phalanges). People have reported seeing ghostly hitchhikers here since the early 1970s. Someone who has a thumb which bends backward when extended is said to have a hitchhiker's thumb. A 1953 study, done at Johns Hopkins University, was one of the first to analyze hitchhiker’s thumb. hitchhiker thumb: malposition of the thumb, that as a result of shortness of the first metacarpal, stands at right angles to the radial border of the hand and in the same place as it; a characteristic sign of diastrophic dwarfism. One allele from the bendy thumb gene can produce a straight thumb and another allele may produce a hitchhiker's thumb. If both the parents have straight thumbs, there is a lowered chance for the child to get affected by hitchhiker’s thumb. Working as an independent travel software company since 1992, HitchHiker has been developing software solutions for airlines, consolidators, online portals (OTAs), travel agencies, tour operators and travel management companies. This looks similar to the classic roadside hitchhiker’s pose, thumb out in hopes of hitching a ride. Various Places, England Dated: 2012 Not all legends are really old. what are the rumor / myths about a hitchhiker's thumb? This means that in order for a person to have this trait they must carry both allele's ( for example a) of the trait, which is in essence means that the person must be homozygous recessive (for example aa) in order to have the trait. Thumbs ranging from straight to hitchhiker. well i have a hitchhikers thumb and here are (just some wild guesses): i think it is for... hitchhiking and it can also be some sort of benefit with playing video games. It's a figure of speech. Find the perfect hitchhiker thumb stock photo. According to textbooks, hitchhiker's thumbs (H) are the dominant trait while straight thumbs are the recessive trait (A). Journal of Bone and Joint Surgery 31: 547-559. Glass, B., and J.C. Kistler. Your thumb’s bendability is controlled by its distal interphalangeal joint, the bendy point at which the bones of your thumb are connected. Sparky House Publishing, Baltimore, Maryland. Is this true? As a noun thumb is the short thick digit of the hand that for humans has the most … Recently I developed a condition that perplexes me and caused me to wonder if any other Parkinson’s patients have it; the big toe of my left foot wants to stand straight up!. Huh. A person who carries a recessive gene would have to have a child with another carrier of the gene in order for that child to inherit the trait. Distal hyperextensibility of the thumb. Find out what happens when a young man offers a lift to a distressed young woman on a bleak moorland road. Hitchhiker’s thumb doesn’t result in any complications or health-related issues. Harris and Joseph (1949) measured the angle between the first and second phalanges of the thumb on X-rays of 294 individuals. Myths of Human Genetics. If instead one parent had the dominant gene for thumb straightness and the other had the recessive gene for hitchhiker’s thumb, their offspring wouldn’t have the condition. Nomads have also used hitchhiking as a primary mode of travel for the better part of the last century, and continue to do so today. i have a hitchhiker's thumb. ©2011 by John H. McDonald. Jeff. The ride is usually, but not always, free. These include: This is a genetic condition that affects the development of bone and cartilage. well for a while i have wondered about this. Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. flexion of the metacarpophalangeal (MCP) joint; hyperextension of the interphalangeal (IP) joint; Terminology. 2011. It’s usually not painful, and it doesn’t make it harder to use your hands. There’s some debate, however, about thumbs always being one of two kinds, straight or hitchhiker’s. She was bleeding as if she had just been run over. So he stopped the car to help her. Some modern tales have been told so often they have become what is known as 'Urban Legends'. hitchhike definition: 1. to travel by getting free rides in someone else's vehicle: 2. to travel by getting free rides…. 9 years ago. Variation in extension of the metacarpo-phalangeal and interphalangeal joints of the thumb. People with the recessive gene for this condition are called carriers. As a rule of thumb, ... Krenitsky J. 10, No. They found a continuous distribution, with most individuals having intermediate values, not the two distinct kinds of thumbs described in the myth: Glass and Kistler (1953) did a similar study, except they used a protractor held against the outside of the thumb to measure the thumb angle, and obtained the following results: Glass and Kistler (1953) arbitrarily called all thumbs with an angle equal to or greater than 50 degrees "hitchhiker's thumbs." I searched the internet for pictures of thumbs (it was easy, because lots of people give the thumbs-up sign when they get their picture taken) and arranged them from straightest to most bent. While there is a genetic influence on thumb angle, thumbs do not divide into two categories, hitchhiker's and non-hitchhiker's. They may also have curvature of the spine, club feet, and hitchhiker’s thumbs. Complications and conditions associated with hitchhiker’s thumb, Family Health History: Why It’s Important and What You Should Know. It was always the smaller ones that offered Sparky House Publishing, Baltimore, Maryland. 0 0. To bring you these 11 facts about the thumb, Mental Floss spoke with three experts on this unique digit: Barbara Bergin, an orthopedic surgeon in … Hereditas 46: 543-569. McDonald, J.H. it is also easier to snap and it makes a louder sound for getting … 1960. Since this Thumb instruction set uses less memory for … It is also called the index finger or the forefinger. There is a variation of the human thumb where the angle between the first and second phalanges varies between 0° and almost 90° when the thumb is in a thumbs-up gesture. The thumb just mean, 'give me a ride'. This looks similar to the classic roadside hitchhiker’s pose, thumb out in hopes of hitching a ride. The three S offspring of H x H parents are inconsistent with a two-allele model in which the allele for S is dominant. Myths of Human Genetics. Harris, H., and J. Joseph. Hitchhiker’s thumb hasn’t been studied extensively, and there is little to no data on its prevalence in the United States or worldwide. 48-50 in: McDonald, J.H. Glass and Kistler (1953) had different people measure the thumbs, and the repeated measurements often differed by several degrees, which would mean that many people would be considered to have a hitchhiker's thumb by one observer but not by a different observer. All rights reserved. 1949. I was diagnosed with Parkinson’s several years ago and have experienced most of the symptoms associated with it. Hitchhiker's thumb is also not linked with any other genetic conditions; it is simply an interesting phenotype, akin to people who can curl their tongues. Distribution of thumb angles. An alternative theory is that thumb bendability involves a spectrum that ranges from no bendability in the joint to extreme bendability. 9 years ago. Acta Genetica 4: 192-206. The modern version of the story, dates back to the turn of the 20th century but the concept goes back much further. However, a 2012 study found that 32.3 percent of a random sample of 310 people had hitchhiker’s thumb. 2011. The only other family study on hitchhiker's thumb that I am aware of is Beckman et al. In many parts of the world, including North America, hitchhikers traditionally stretch out one arm and stick out their thumb pointing up. Here's a link of an old thread.. Ohhh and I remember a random guy on a bar explaining that people that have hitchhikers thumb is meant to be a musician/gifted.. Btw, Victor Wooten, Larry Graham, Louis Johnson, Michael Manring, Stanley Clark has it too. This finger has…, The pointer finger is the second digit and first finger of the human hand. 3 Answers. A person born with the “Ss” genotype will have a straight thumb, but will also be a bearer of the hitchhiker's thumb. The extension of the thumb is sometimes referred to as “the hitchhike sign” (Figure 1). Glass and Kistler (1953), having decided that anyone with one or both thumbs having an angle equal to or greater than 50 degrees had the hitchhiker's thumb trait, collected the following family data: They concluded that thumb type was a simple Mendelian trait, with the allele for S dominant. Hitchhiker’s thumb can occur in one or both thumbs. She collapsed to the ground immediately. It may be cited as pp. The thumb was originally described as a short squat black rod, smooth and matte with a couple of flat switches and dials at one end. Along with the thumb and middle finger, it is one of the most often-used digits. oversimplification that is useful for teaching beginners, like teaching physics students that electrons are particles that rotate around the nucleus of an atom in little circular orbits It doesn't mean you literally have the thumb of a hitchhiker. People with this condition are often referred to as being “double jointed,” as their joints are able to move beyond the normal range of motion. always stopped for hitchhikers. Hitchhiker's thumb is a layman's term for distal hyperextensibility of the thumb.The joint closest to the end of the thumb is called the distal joint. The myth is that there are just two kinds of thumbs, straight thumbs (S) and hitchhiker's thumbs (H), and the trait is controlled by a single gene with two alleles, with the allele for S being dominant. Favorite Answer. Myths and Legends. Hitchhiker’s thumb may be an inherited condition with a genetic link. The human hand and wrist are comprised of three different bone groups. lolol You can probably do what you want with this content; see the permissions page for details. Hitchhiker's thumb: The myth. Answer Save. Hitchhiker’s thumb is a little studied phenomenon that may have a genetic link. An evaluation of some anthropological traits used in paternity tests. In the film adaption, it appeared as a smooth, silver ring, with a symbol on it that lit up brightly when it was used. In some cases, the causes can be treated at home with rest and care. They noted that many individuals would then have one hitchhiker's thumb and one straight thumb; they classified these individuals as having the hitchhiker's thumb trait. Numbness in the thumbs can have a broad range of causes. 0 0. The carpals are…, The heel is the portion of the human body that lies at the bottom-rear part of each foot. Böök, and E. Lander. Its address is http://udel.edu/~mcdonald/myththumb.html. Hitchhiker’s thumb doesn’t adversely affect the ability of the person with it to use their hands in any way. The hitchhike sign is used to identify two different conditions: radial nerve or posterior interosseous nerve palsy and diastrophic dwarfism. People with this condition have very short arms and legs. As verbs the difference between hitchhike and thumb is that hitchhike is to try to get a ride in a passing vehicle while standing at the side of a road generally by either sticking out one's finger or thumb or holding a sign with one's stated destination while thumb is to touch or cover with the thumb. In that study, 24.7 percent of white people and 35.6 percent of Black people were found to have this condition in the United States. Glass and Kistler (1953) were too polite to mention incorrect paternity as another possible explanation. Seriously, just name your favorite bassist and pretty much they prolly have it.. This is a genetic trait, and it does not interfere with the thumb's normal functions. This occurs when the tissues holding the joint…. Hitchhiker's thumb trait is a autosomal recessive trait. Of those subjects, 15.5 percent were male, and 16.8 percent were female. You should not use hitchhiker's thumb to demonstrate basic genetics. Ehlers-Danlos Syndrome: What Is It and How Is It Treated? Hitchhiker's thumb is often used to demonstrate genetics, but neither part of the myth is true: thumbs don't fall into two discrete categories, and the trait is not controlled by a single gene. Known formally as distal hyperextensibility, this condition isn’t painful and doesn’t inhibit the thumb’s function in any way. Last medically reviewed on June 18, 2019, People with hypermobile joints are able to extend them painlessly beyond the normal range of motion. This means that the trait for hitchhiker’s thumb was present in both parents of the person born with it. Apparently, the thumb-thing is region-specific: Most places have some regionally-dependent method by which a hitchhiker signals to passing drivers that they are looking for a ride. This was proposed by Glass and Kistler (1953) and has been the subject of very little research since then. People with hitchhiker’s thumb have distal joints that can bend back as far as 90 degrees. This page was last revised December 8, 2011. Nutrition in Renal Failure: Myths and Management. Image Credit: Myths of Human Genetics John H. McDonald, University of Delaware. ... Thumbs ranging from straight to hitchhiker. Although hitchhikers is genetic, the parents are not always responsible for this defect in the child. Hitchhiking (also known as thumbing or hitching) is a means of transportation that is gained by asking individuals, usually strangers, for a ride in their car or other vehicle. Hitchhiker thumb deformity is a musculoskeletal manifestation of rheumatoid arthritis presenting in the thumb, with the combination of:. Instead, the thumb angle varies continuously, with most thumbs having intermediate values. Unless it’s the result of a congenital disorder, such as diastrophic dysplasia or hypermobility spectrum disorder, it isn’t painful. Hitchhiker thumb deformity, also known as Z-thumb or duckbill thumb, is used to both describe the appearance of the thumb on … Healthline Media does not provide medical advice, diagnosis, or treatment. The myth is that there are just two kinds of thumbs, straight thumbs (S) and hitchhiker's thumbs (H), and the trait is controlled by a single gene with two alleles, with the allele for S being dominant. I knew just how it used to feel to be standing on the side of a country road watching the cars go by, I hated the drivers for pretending they didn't see me, especially the onesin big cars with three empty seats. Hitchhiker’s thumb is a thumb that’s hypermobile, or very flexible, and able to bend backward beyond the normal range of motion. Beckman, L., J.A. The signal was said to be akin to an emergency signal in that it was omnidirectional and limited in range. No need to register, buy now! Some people have "hitchhiker's thumbs," which bend backwards with a large angle between the two segments (phalanges). Data for right thumbs for males and females combined (Harris and Joseph 1949). In 1974, a man reported seeing a young girl appear in the road ahead of his car. Its exterior shape is formed by the calcaneus, also known as…, The elbow is one of the largest joints in the body. They gave no explanation for why they picked 50 degrees as the dividing point. Some people with hitchhiker’s thumb may have acquired two recessive copies, or alleles, of the gene that determines thumb straightness. Hitchhiker’s thumb may be associated with several medical conditions. Lv 6. and it the primal era some benefits could be making things and using weapons and it is easier to grab things if you think about it. This is one such story. Relevance. 1953. The Hitchhiker. Find out what causes this condition and and how it's treated. 4 and at certain places where there are larger broken chords my thumb would lock backwards, causing me to hit multiple wrong notes. What’s Causing Numbness in My Thumb and How Do I Treat It. Straight thumbs are those that cannot bend at all. Sources of Variation Mutations Distribution of thumb angles.

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