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Scapular protraction [10] (aka scapular abduction) The opposite motion of scapular retraction. The scapula is moved anteriorly and laterally along the back, moving the arm and shoulder joint anteriorly. If both scapulae are protracted, the scapulae are separated and the pectoralis major muscles are squeezed together. [11]
The prevalence of shoulder pain tends to increase and become more severe as we age - especially for folks in their 50’s and beyond. When people complain of shoulder pain - it can manifest in a ...
Animation of the shoulder joint. The muscles shown are subscapularis muscle (at right), infraspinatus muscle (at top left), teres minor muscle (at bottom left) The movement of the scapula across the rib cage in relation to the humerus is known as the scapulohumeral rhythm, and this helps to achieve a further range of movement. This range can be ...
The scapula (pl.: scapulae or scapulas [1]), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone). Like their connected bones, the scapulae are paired, with each scapula on either side of the body being roughly a mirror image of the other.
Facioscapulohumeral muscular dystrophy (FSHD) is a type of muscular dystrophy, a group of heritable diseases that cause degeneration of muscle and progressive weakness. Per the name, FSHD tends to sequentially weaken the muscles of the face, those that position the scapula, and those overlying the humerus bone of the upper arm.
It is believed that it takes at least four to six weeks for the labrum to re-attach itself to the scapula bone (shoulder blade), and probably another four to six weeks to get strong. The labrum is a ring of cartilage on the rim of a shallow socket in the scapula into which the head of the upper arm bone normally fits and rotates. [citation needed]
Snapping scapula syndrome, also known as scapulocostal syndrome or scapulothoracic syndrome, is described by a "grating, grinding, popping or snapping sensation of the scapula onto the back side of the ribs or thoracic area of the spine" (Hauser). Disruption of the normal scapulothoracic mechanics causes this problem.
The supraglenoid tubercle ossifies separately from the rest of the scapula, so may not be as strong as the rest of the bone. It can be pulled off , [6] often after an excessively strong contraction of the biceps brachii. [7] This may also cause a fracture of the surrounding parts of the scapula, particularly the glenoid cavity. [8]