Definition of concentric - What it is, Meaning and Concept

The adjective concentric is used in the field of geometry to qualify a figure that has the same center as another.The notion is also used with respect to two bodies.

We can understand the notion of concentric by observing the whites that are used to practice shooting.These elements are formed by several concentric circles of different sizes, the most important being the small circle that constitutes the center shared by all.Shooters that have greater precision hit the center of the target.If the shot is not accurate, it can end in any of the concentric circles that are part of the target.

Two geometric figures are not only considered concentric if they have the same center, but they can also share the origin or axis.In addition to the circles, the cylinders, the tubes, the spheres and the discs can enter this category.The meridians of the Earth, for example, are concentric and all have the same radius , that is, not necessarily two figures must have different dimensions to be concentric.

The coaxial cables , meanwhile, have two concentric conductors .These cables that allow the transmission of high-frequency electrical signals have a central conductor (known as core ) and another outer conductor (called braid or mesh ).The core carries the information, while the braid acts as a ground and return reference These concentric conductors are separated by the dielectric, which is responsible for insulating them.The whole assembly is also protected by another insulating cover.

Among muscle contractions, on the other hand, there are concentric heterometric contractions .In these contractions, a muscle manages to develop the tension it needs to overcome a resistance, shortening and displacing a sector of the body .

This type of contraction appears when an approach of the insertion points of a muscle is generated.When shortening, the concentric contraction takes place.The people who wish to develop their muscles, in this framework, perform repetitions of concentric contractions and, in turn, eccentric contractions.

There is talk of eccentric contractions to refer to the lengthening of any muscle when the resistance it faces is greater than the tension it exerts.In a case like this, its length increases during the contraction.Every day, when we finish drinking a drink and lower our arm to rest the container on the table, for example, the brachial biceps experience this type of contraction.

One of the everyday examples This type of muscular contraction occurs when we bring a glass to the mouth to drink: as a result of this very common action, the points of insertion are joined, contracted or shortened.Already in a field of controlled physical exercise, such as being a gym, we can recognize examples that look for this phenomenon in a specific way:

* the extension machine : the muscle called quadriceps is shortened along the action of lifting weights, and this causes advanced concentric contraction.In this case, the points of insertion of said muscle ;

* triceps with pulley : during triceps training, we lower and extend the arm, causing a concentric contraction in the muscle.The points of this muscle (the brachial triceps, which is located in the back of the arm) also approach in this case.

In the world of art the term appears in the painting entitled " Squares with concentric circles ", published in 1913 by the Russian painter Vasili Kankinski, one of the precursors of the abstraction in the world of painting.Scholars say that his work began expressionism and the so-called lyrical abstraction , through a work entitled « First abstract watercolor «.