Hiérarchie anatomique

Anatomie générale > Muscles; Système musculaire > Muscles du membre supérieur > Muscles > Muscle infra-épineux

Structures sous-jacentes


Traductions

Description

Origin: Infraspinous fossa of thescapula

Insertion: Middle facet of greater tubercle of the humerus

Artery: Suprascapular and circumflex scapular arteries

Nerve: Suprascapular nerve

Action: Lateral rotation of arm and Adduction of arm and stabilizeshumerus

Antagonist: Subscapularis, pectoralis major, and latissimus dorsi

Description:
The Infraspinatus is a thick triangular muscle, which occupies the chief part of the infraspinatous fossa; it arises by fleshy fibers from its medial two-thirds, and by tendinous fibers from the ridges on its surface; it also arises from the infraspinatous fascia which covers it, and separates it from the Teretes major and minor. The fibers converge to a tendon, which glides over the lateral border of the spine of the scapula, and, passing across the posterior part of the capsule of the shoulder-joint, is inserted into the middle impression on the greater tubercle of the humerus. The tendon of this muscle is sometimes separated from the capsule of the shoulder-joint by a bursa, which may communicate with the joint cavity.


Cette définition contient du texte provenant d'une édition publique de Gray's Anatomy (20eme édition Américaine de "Gray's Anatomy of the Human Body" publiée en 1918 - http://www.bartleby.com/107/).

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