Coronoid process of the ulna

Coronoid process of the ulna
Bone: Coronoid process of the ulna
Upper extremity of left ulna. Lateral aspect.
Latin processus coronoideus ulnae

The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna.

Its base is continuous with the body of the bone, and of considerable strength.

Its apex is pointed, slightly curved upward, and in flexion of the forearm is received into the coronoid fossa of the humerus.

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

Its antero-inferior surface is concave, and marked by a rough impression for the insertion of the Brachialis muscle. At the junction of this surface with the front of the body is a rough eminence, the tuberosity of the ulna, which gives insertion to a part of the Brachialis; to the lateral border of this tuberosity the oblique cord is attached.

Its lateral surface presents a narrow, oblong, articular depression, the radial notch.

Its medial surface, by its prominent, free margin, serves for the attachment of part of the ulnar collateral ligament. At the front part of this surface is a small rounded eminence for the origin of one head of the Flexor digitorum superficialis muscle; behind the eminence is a depression for part of the origin of the Flexor digitorum profundus muscle; descending from the eminence is a ridge which gives origin to one head of the Pronator teres muscle.

Frequently, the Flexor pollicis longus muscle arises from the lower part of the coronoid process by a rounded bundle of muscular fibers.

The coronoid process of the ulna should not be confused with the similar sounding coracoid process of the scapula.

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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 As such, some of the information contained within it may be outdated.

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  • Coronoid process — The Coronoid process (from Greek korone, like a crown ) can refer to: The coronoid process of the mandible, part of the ramus mandibulae of the mandible The coronoid process of the ulna, a triangular eminence projecting forward from the upper and …   Wikipedia

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  • coronoid process — n 1) the anterior process of the superior border of the ramus of the mandible 2) a flared process of the lower anterior part of the upper articular surface of the ulna fitting into the coronoid fossa when the arm is flexed * * * 1. a process on… …   Medical dictionary

  • coronoid process — /ˌkɒrənɔɪd ˈproʊsɛs/ (say .koruhnoyd prohses) noun 1. a projection from the ulna which articulates in the coronoid fossa of the humerus. 2. a process of the mandible …  

  • coronoid process — noun Anatomy 1》 a flattened triangular projection above the angle of the jaw where the temporalis muscle is attached. 2》 a projection from the front of the ulna. Origin C18: coronoid from Gk korōnē (denoting something hooked) + oid …   English new terms dictionary

  • coronoid process — 1) a process on the upper end of the ulna. It forms part of the notch that articulates with the humerus. 2) the process on the ramus of the mandible to which the temporalis muscle is attached …   The new mediacal dictionary

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  • Coronoid — Cor o*noid (k[o^]r [ o]*noid), a. [Gr. korw nh crow + oid: cf. F. corono[ i]de.] (Anat.) Resembling the beak of a crow; as, the coronoid process of the jaw, or of the ulna. [1913 Webster] …   The Collaborative International Dictionary of English

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