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The coronoid process is a triangular eminence projecting forward from the anterior proximal portion 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. ==Additional images== File:Gray213.png|Bones of left forearm. Anterior aspect. File:Elbow joint - deep dissection (anterior view, human cadaver).jpg|Elbow joint. Deep dissection. Anterior view. File:Slide2xzxzxz.JPG|Elbow joint. Deep dissection. Anterior view. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Coronoid process of the ulna」の詳細全文を読む スポンサード リンク
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