What are the inflammations of skeletal muscles

Our bones are surrounded by muscles, no matter it is fat or muscle, it may be caused by bone and joint problems and inflammatory diseases, which may also be related to ligaments and nerves. As a patient, in addition to exercising, you also need to control your body reasonably and check your body. These are all things that need to be done.

The scapula is located behind the thorax. It is a triangular flat bone located between the 2nd to 7th ribs (the upper angle of the inner edge is level with the second thoracic vertebra, and the lower angle is level with the seventh thoracic vertebra). It is divided into two faces, three angles and three edges.

The front is the subscapular fossa, which is a large and shallow fossa. There is a transverse bony ridge at the back, called the scapular spine. The shallow depressions above and below the spine are called the supraspinous fossa and infraspinous fossa respectively.

The outer side of the scapular spine is flat and is called the acromion. The lateral angle is thickened and has a glenoid cavity, which forms the glenohumeral joint with the humeral head. The upper and lower corners are located at the upper and lower ends of the inner edge, respectively opposite the 2nd and 7th ribs, and can be used as marks for counting ribs.

The medial margin is long and thin, facing the spine. The lateral edge is thickened and faces the axilla. The shoulder blades are located on the upper and outer part of the back. The front of the scapula is slightly concave, and the back has a high ridge pointing outward, called the scapular spine. The outer end of the scapular spine is called the acromion, which is the highest point of the shoulder.

The scapula can have six movements: elevation, depression, external rotation, internal rotation, abduction and adduction.

Ordinary people may generally call it "periarthritis of the shoulder", but as professionals, we must never treat "periarthritis of the shoulder" in a general way. There are 16 muscles attached to the shoulder joint. You must have a clear idea of ​​which muscles are injured when treating them.

1. Ovohyoid muscle:

The omohyoid muscle originates from the upper edge of the scapula next to the suprascapular notch. It consists of two muscle bellies connected by the median tendon and inserts on the lateral side of the sternohyoid muscle and the lower edge of the body of the hyoid bone. Its function is to depress the hyoid bone which has been lifted up.

2. Pectoralis minor:

The pectoralis minor originates from the coracoid process of the scapula and inserts on the 2nd to 5th ribs. It has the function of lifting the ribs and rotating the scapula downward.

In people with round shoulders and hunchbacks, the pectoralis minor muscles are often tense, stretching the rhomboid muscles. In addition, tense pectoralis minor muscles can easily compress the brachial plexus and subclavian artery and vein.

3. Serratus anterior muscle:

The serratus anterior originates from the upper and lower angles of the scapula and the edge of the spine (medial edge) between the two, and ends between the 8th and 9th ribs of the head. Its function is to pull the scapula forward and raise the ribs, and it is an auxiliary respiratory muscle.

Serratus anterior weakness usually results in winged shoulders and affects the ability to lift the scapula.

4. Biceps

The biceps brachii originates from the supraglenoid tubercle and the posterior lip of the glenoid fossa, passes downward over the humeral head and enters the intertubercular groove. There is a transverse ligament on the front side of the groove to prevent the long muscle from slipping. This tendon has the function of suspending the humeral head and preventing it from shifting outward and upward. When the forearm is supinated and the elbow is flexed, the tension of the tendon increases, but it does not slide along the intertubercular groove. If this tendon ruptures, the stability of the shoulder may be affected. The long tendon slides up and down the intertubercular groove during shoulder movement. When the biceps tendon sheath is inflamed, the tendon sheath swells, so abduction and internal and external rotation are affected, and local pain occurs during movement. In addition to its elbow flexion function, the biceps also plays a role in scapulohumeral flexion.