What is adduction?

What Does adduction Mean

Adduction is a term that comes from the Latin word adductĭo . The first meaning mentioned in the dictionary of the Royal Spanish Academy ( RAE ) refers to the act of adducing . This verb, for its part, refers to showing evidence or justifications .

The concept is also used to name the movement that consists of bringing a limb or other body part to the median plane that, in an imaginary way, divides the body into two symmetrical halves. If a person has their arms extended horizontally at shoulder height, shaping a letter T, and then lowers them so that their hands are at waist level, they have performed an adduction movement.

The opposite movement to adduction is abduction . In this case, the subject separates the extremities of the plane of symmetry, exerting an action in a transverse direction. This happens if the arms that are located next to the body are raised.
The eyes owe their movement to a set of muscles known as extraocular muscles . When we relax our gaze so that our eyes point straight ahead, without looking at any particular point, we adopt the so-called primary position . Rotation on the horizontal axis upward is known as lift , while the inverse is depression (looking up and down, respectively). In this case, we speak of adduction to define the movement of an eye towards the central axis of the body, in a similar way to the adduction of the arms described above; Rather, abduction consists of moving one eye outward.
In countries such as Venezuela , Ecuador and Bolivia , the idea of ​​adduction is used as a synonym for conduction (in the sense of a series of conduits that allow the transport of fluids). For example: "The municipal authorities announced that, in the coming weeks, they will begin maintenance works on the San Mateo adduction" , "According to what was promised by the governor, an adduction that will go from the dam to Nuestra Señora del Rosario will bring drinking water to the town ” , “ The young man, who was driving at high speed, lost control of his motorcycle and when he fell he hit the adduction ” .
Water collection and adduction
Throughout history, human beings have required a water supply that allows them to adequately irrigate their plantations and the various sanitation tasks in their settlements, as well as consume it to feed themselves and maintain their own personal hygiene. We must not forget that all individuals on this planet need water to survive, since it is an essential part of it; In the case of our species, it is a factor that limits our subsistence, and many suffer it because of the great imbalance that exists between rich and poor.

One of the most significant creations to guarantee water supply is known as catchment or harvest , an essential technology for many people to access this precious resource. Catchment is the collection and storage of water that comes from various sources, with the aim of taking advantage of its use; Through this procedure, the water is taken from the basin and directed to reserve ponds to significantly increase the supply.
The term adduction, in this context, is defined as the act of conducting or transporting the water from the source of the catchment, in this case the basin, to the treatment plant, the network or the regulation tank. The means that exist to carry out this transfer are tunnels, channels and pipes, and one or the other is chosen according to the particular characteristics of each installation, the volume of water to be transported and the available budget, among other factors.

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