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Muscular and subacute muscles
Last reviewed: 23.04.2024
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The muscular muscle (m.supraspinatus) is located in the paranasal fossa. It begins on the back surface of the scapula above the scapula and on the supragastric fascia. The bundles extend laterally. The muscle is attached to the upper surface of the large tubercle of the humerus; part of the bundles of the supraspinous muscle is weaved into the capsule of the shoulder joint.
The function of the supraspinatus: withdraws the shoulder; pulls the capsule joint, protecting it from infringements.
Innervation of the supraspinatus: suprascapular nerve (CV-CVI).
Blood supply of the supraspinatus: suprascapular artery, artery surrounding the scapula.
The subacute muscle (m.infraspinatus) begins on the back surface of the scapula below its awn and on the fascia of the same name. The muscle bundles, converging, run in the lateral direction and somewhat upward (behind the shoulder joint). The muscle is attached to the middle area of the large tubercle of the humerus. Some of the bundles are weaved into the capsule of the shoulder joint.
Subacute muscle function: rotates the shoulder outside (supination); pulls the joint capsule upwards, protecting it from infringement.
Innervation of the subaccess muscle: suprascapular nerve (CV-CVI).
Blood supply to the subaccess: the artery surrounding the scapula; suprapulmonary artery
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