该 肩胛骨 is likewise known as the shoulder blade. It articulates with the humerus on the glen humeral joint, and with the clavicle at the acromioclavicular joint. 在这样做, the scapula connects the higher limb to the trunk. It’s far a triangular, flat bone, which serves as a website for attachment for many (17!) muscle mass. In this newsletter, we shall study the bony landmarks at the coastal, lateral and posterior surfaces of the scapula.
The scapula attaches the top arm and higher again muscle mass that increase your hands and shoulders and bend your neck backward or sideways.
Scapula lies in the back of and medially to the shoulders, over the rib cage on each side of the spine; collectively with the clavicles, they shape the shoulder girdle. They make joints with the higher arm bones (肱) and collar bones (clavicle) however not with the ribs and backbone. Shoulder blade pain can be felt over the big location of the top lower back, even though.
The Scapula is a flat bone with three angles the top (advanced), bottom (inferior) and lateral (盂) perspective and 3 borders–the superior, 侧 (axillary) and medial (vertebral) border.
On the rear of the Scapula, at around 66% of its tallness, a hard edge called the shoulder bone spine runs corner to corner upwards toward the horizontal edge and closures as a hard snare the acromion, which makes a hard top of the shoulder joint. The part of the Scapula above the spine is referred to as the supraspinatus fossa and the one below the backbone the infraspinous fossa. The opposite bony element, which stands proud from the upper the front of the Scapula, is referred to as the coracoid. The frontal floor of the scapula is known as the subscapular fossa.
It arises from the medial two-thirds of the subscapular fossa.
Serratus anterior muscle is inserted alongside the medial border of the coastal surface-one digitations to the superior attitude, digitations to the medial border, and five digitations to the inferior perspective.
It arises from the medial thirds of the supraspinatus fossa (which includes the upper floor of the backbone).
Arises from the medial two-thirds of the infraspinous fossa (which include the decreased surface of the spine).
Deltoid muscle emerges from the lower outskirt of the peak of the spine and from the sidelong fringe of the acromion.
The trapezius muscle is embedded into the higher request of the peak of the spine and into the average outskirt of the acromion.
The long head of the biceps arises from the supraglenoid tubercle. The fast head from the lateral a part of the tip of the coracoid system.
The Coracobrachialis arises from the media a part of the top of the coracoid method.
Pectoralis minor is inserted into the medial border and advanced floor of the coracoid procedure.
The lengthy head of the triceps arises from the infraglenoid tubercle.