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Encyclopedia > Upper extremity of radius
Bone: Upper extremity of radius
The radius and ulna of the left forearm, posterior surface. The top is proximal (elbow) and bottom is distal (wrist).
Gray's subject #52 219

The upper extremity of the radius (or proximal extremity) presents a head, neck, and tuberosity. Image File history File links Download high resolution version (717x1254, 103 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The ulna (Elbow Bone) [Figs. ... The radius and ulna of the left forearm, posterior surface. ...

  • The head is of a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum (or capitellum) of the humerus. The circumference of the head is smooth; it is broad medially where it articulates with the radial notch of the ulna, narrow in the rest of its extent, which is embraced by the annular ligament.
  • The head is supported on a round, smooth, and constricted portion called the neck, on the back of which is a slight ridge for the insertion of part of the supinator muscle.
  • Beneath the neck, on the medial side, is an eminence, the radial tuberosity; its surface is divided into a posterior, rough portion, for the insertion of the tendon of the biceps brachii muscle, and an anterior, smooth portion, on which a bursa is interposed between the tendon and the bone.

An inflorescence is a group or cluster of flowers on a branch of a plant. ... The humerus is a long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ... The Annular Ligament (orbicular ligament) is a strong band of fibers, which encircles the head of the radius, and retains it in contact with the radial notch of the ulna. ... The Supinator muscle is a muscle of the human body. ... A person flexing his biceps brachii In human anatomy, the biceps brachii is a muscle on the upper arm that acts to flex the elbow. ... Bursa (formerly known as Brusa or Prusa) is the capital of the Bursa Province in northwestern Turkey. ... A tendon (or fatty) is a tough band of fibrous connective tissue that connects muscle to bone, or muscle to muscle and is designed to withstand tension. ...

Additional images

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...


 
 

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