Olecranon

Olecranon
Bone: Olecranon
Gray212.png
Upper extremity of left ulna. Lateral aspect.
Gray's subject #52 214

The olecranon is a large, thick, curved bony eminence of the forearm that projects behind the elbow.

It is situated at the upper (proximal) end of the ulna, one of the two bones in the forearm. When the hand faces forward (supination) the olecranon faces towards the back (posteriorly).

It is bent forward at the summit so as to present a prominent lip which is received into the olecranon fossa of the humerus in extension of the forearm.

Its base is contracted where it joins the body and the narrowest part of the upper end of the ulna.

Its posterior surface, directed backward, is triangular, smooth, subcutaneous, and covered by a bursa.

Its superior surface is of quadrilateral form, marked behind by a rough impression for the insertion of the Triceps brachii; and in front, near the margin, by a slight transverse groove for the attachment of part of the posterior ligament of the elbow-joint.

Its anterior surface is smooth, concave, and forms the upper part of the semilunar notch.

Its borders present continuations of the groove on the margin of the superior surface; they serve for the attachment of ligaments, viz., the back part of the ulnar collateral ligament medially, and the posterior ligament laterally.

From the medial border a part of the Flexor carpi ulnaris arises; while to the lateral border the anconeus muscle is attached.

Additional images

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.



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См. также в других словарях:

  • olécranon — m. anat. Apófisis gruesa y redondeada situada en el extremo superior del cúbito donde se inserta el tendón del músculo tríceps. Medical Dictionary. 2011. olécranon …   Diccionario médico

  • Olécranon — Olécranon. El olécranon (del griego ōlekranon, a su vez de ōlenēs kranion, el cráneo del antebrazo [1] ) es una de las apófisis de la parte superior de la ulna; tiene forma de prisma de base cuadrangular y constituye la prominencia dorsal del… …   Wikipedia Español

  • Olecranon — O*lec ra*non, n. [NL., fr. Gr. ?; ? elbow + krani on the head.] (Anat.) The large process at the proximal end of the ulna which projects behind the articulation with the humerus and forms the bony prominence of the elbow. [1913 Webster] …   The Collaborative International Dictionary of English

  • Olecranon — (griech.), Ellbogenfortsatz, s. Arm …   Meyers Großes Konversations-Lexikon

  • olecranon — [ō lek′rə nän΄, ō΄li krā′nän΄] n. [ModL < Gr ōlekranon (for ōlenokronon) < ōlenē, elbow (see ELL2) + kranion, the head: see CRANIUM] the part of the ulna projecting behind the elbow joint …   English World dictionary

  • Olecranon — Of or pertaining to the bony tip of the elbow. The olecranon is, in fact, the near end of the ulna, the bone in the forearm, that forms the pointed portion of the elbow. The triceps muscle tendon of the back of the arm attaches to the olecranon.… …   Medical dictionary

  • Olécranon — ► sustantivo masculino ANATOMÍA Apófisis de la extremidad superior del cúbito que forma el saliente del codo. TAMBIÉN olecrano * * * olécranon m. Anat. Apófisis del extremo superior del cúbito que forma el codo. * * * El olécranon es una de las… …   Enciclopedia Universal

  • Olecranon — Die Ulna (lat. für Elle) ist neben dem Radius (Speiche) einer der beiden Knochen des Unterarmes. Die Elle ist kleinfingerseitig gelegen, weniger kräftig als die Speiche und ein typischer Röhrenknochen. Inhaltsverzeichnis 1 Oberes Ende 2 Körper 3… …   Deutsch Wikipedia

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  • Olecranon — alkūnė statusas T sritis kaulai atitikmenys: lot. Olecranon ryšiai: platesnis terminas – artimasis alkūnkaulio galas …   Paukščių anatomijos terminai


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