Quadruped Totally Explained

Everything about Quadruped totally explained

Quadrupedalism (from Latin, meaning "four legs") is a form of land animal locomotion using four legs. The majority of walking animals are quadrupeds, including mammals such as cattle and cats, and reptiles, like lizards. Birds, humans, insects, crustaceans and snakes are not quadrupeds. There are some exceptions, for example among the insects the praying mantis is a quadruped. A few birds may use quadrupedal movement in some circumstances, for example the shoebill will sometimes use its wings to right itself after lunging at prey.

Quadrupeds and tetrapods

Not all four-limbed animals are quadrupeds. Although arms and wings are, in the evolutionary sense, modified legs, four-limbed animals are in fact classed as tetrapods – members of the taxonomic unit Tetrapoda. These include all vertebrates with quadrupedal ancestors, including mammals, reptiles, amphibians, and birds. See Pierson v. Post, 3 Cai. R. 175, 2 Am. Dec. 264 (N.Y. 1805), read this case for common law knowledge of quadrupeds ferae naturae.
The distinction between quadrupeds and tetrapods is important in evolutionary biology, particularly in the context of bipeds, winged animals, and animals whose limbs have adapted to other roles (for example fins, in the case of cetaceans and pinnipeds). All of these animals are tetrapods, but none are quadrupeds. Even snakes, whose limbs have become entirely vestigial, are nevertheless tetrapods.

Quadrupedalism in humans

In July of 2005, in rural Turkey, scientists discovered five Kurdish siblings who had learned to walk naturally on their hands and feet. Unlike chimpanzees, who ambulate on their knuckles, the Turkish siblings (ranging from 18 to 34 years old) walked on their palms, allowing them to preserve the dexterity of their fingers. Calluses found on their hands make the possibility of a hoax unlikely. Another similar case has been reported in Chile, but the case is still being investigated and reports are not released as of March 22, 2006.
The discovery of the family has provided scientists a unique view into human evolutionary history. Nicholas Humphrey, a researcher from the London School of Economics, has suggested

and colleagues have argued that their gait is due to two rare phenomena coming together. First, instead of initially crawling as infants on their knees, they started off learning to move around with a “bear crawl” on their feet. Second, due to their congenital brain impairment, they found balancing on two legs difficult. Because this, their motor development was channelled into turning their bear crawl into a substitute for bipedality.
Other scientists, such as Stefan Mundlos of the Max Planck Institute, believe that the family's unusual gait may result from a genetic abnormality. Mundlos has found a region on chromosome 17 which might be responsible for human bipedalism.

Quadrupedal Movement for Exercise

Many people, especially practitioners of Parkour and Freerunning and Georges Hébert's Natural Method

, find benefit in using quadrupedal movement in order to build full body strength. For added difficulty this can done faster or down stairs. Moving quadrupedally exercises the entire anterior: thighs, core, shoulders, and triceps.

Further Information

Get more info on 'Quadruped'.

External Link Exchanges

Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:

<a href="http://quadruped.totallyexplained.com">Quadruped Totally Explained</a>

Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned.