Location of Humerus, Radius and Cubitus

Wondering where the humerus, radius and cubitus are? These bones are strategically placed in the body and arm and should not be confused. You are simply told where these bones are located and how to retain their location.

Article plan

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  • Bones of the arm and elbow: knowing your anatomy
  • What are the bones of the arm and elbow used for?
  • Cubitus, humerus and radius: where are they?
    • Location of the cubitus in the arm
    • Location of the radius in the arm
    • Location of the humerus in the arm
  • How to retain the locations of the cubitus, humerus and radius?

Bone of the arm and elbow: to know its anatomy

The anatomy of the human body is complex. The body counts in all and for all 206 bones. 60 of these bones are located in the upper limbs and 60 others are located in the lower limbs. You should know that the skeleton does not have the same number of bones in adulthood as at birth: amazing, right?

In our article, we will focus on the cubitus, humerus and radius, which are difficult to place when we do not know the anatomy of the human body well. The cubitus, humerus and radius are bones, all three of which are located in the arm around the elbow. The cubitus is also called ulna, which can blur tracks when researching the bones of the arm.

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What are the bones of the arm and elbow for?

Bones, in general, are the solid structure of the human body, on which everything rests. To be able to move and perform the simplest gestures of everyday life, every human being uses his muscles. The muscles of the body rest on the bones and the skeleton.

The muscles of the arm therefore rely on the bones of the arm, of which the ulna, the humerus and the radius are part of. Without the skeleton, muscles are just clusters that can not be effectively used. It is therefore essential that the alliance of bones and muscles, in the body or in the arms, be in solidarity, in order to allow optimal mobility and motor skills.

Cubitus, humerus and radius: where are they?

The cubitus (or ulna), humerus, and radius are all three of the bones of the arm. Every person, male or female, is born with two specimens of ulna, humerus and radius, if the skeleton is complete and no malformation or absence is detected.

So we all possess, if the human body is complete at birth and without malformation:

  • a left humerus
  • a humerus
  • law a upright cubitus (or ulna)
  • a left cubitus (or ulna)
  • a straight radius
  • a left radius.

Location of the cubitus in the arm

The cubitus, also called ulna, is the bone that is in the forearm (glued to the hand) and inner side or body side , when one stretches the arm in front of you, thumb outward, face or palm facing forward. The cubitus or ulna, associated with the radius, forms the forearm and allows the wrist to be articulated.

Location of the radius in the arm

The radius is the bone that is in the forearm (glued to the hand) and the outer side when stretched the arm along the body, thumb outward, face or palm facing forward. The radius, associated with the ulna or ulna, forms the forearm and allows to articulate the wrist.

Location of the humerus in the arm

Humerus is the bone in the arm (above the elbow) and is attached by the elbow to the two main bones of the forearm (radius and ulna). The humerus is the long bone of the arm , between the shoulder and the elbow. It makes the connection between the shoulder joint or more precisely the scapula (scapula) and the elbow joint.

The humerus is connected to the cubitus (or ulna) by the humeral trochlea and to the radius by the humeral capitulum.

Good to know : when the arm isin pronation or supination , or more simply, when turning the wrist inward or outward, the cubitus (or ulna) and radius are crossed at the middle level (approximate overlap).

How to remember the locations of the cubitus, humerus and radius?

There are simple tricks to remember so as not to deceive in the location of these three bones of the arm:

  • The cubitus or ulna is located side c orps
  • Radius means “ray ”: You can then think of the radiation that goes outward
  • Humerus, meanwhile, resembles the word “mood “, which is closer to the head, quite simply!

The anatomy of the body is complex, but thanks to small tricks like these, you can understand the anatomy of the arm in a simpler way. To help yourself and if you have any doubt about the location of the radius, cubitus and humerus, check out an anatomy dictionary , which will help you put in pictures the words.

The joint of the body and skeleton will no longer have secrets for you, whether you are in medical studies or just curious to remember how the bones of the arm are placed. All you have to do is look at your arms, palm up , and train.

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