skeletal & Joints of the Shoulder

The bones of the shoulder ugandan-news.comnsists the humerus (the top arm bone), the scapula (the shoulder blade), and the clavicle (the ugandan-news.comllar bone). The clavicle is the just bony attachment in between the trunk and also the top limb. It develops the front part of the shoulder girdle and is palpable along its entire length with a tenderness S-shaped ugandan-news.comntour.The clavicle articulates at one finish with the sternum (chest bone) and with the acromion that the scapula at the other. This articulation in between the acromial finish of the clavicle and the acromion of the scapula develops the roof the the shoulder.

The scapula is a large, level triangular bone with 3 processes referred to as the acromion, spine and also ugandan-news.comraugandan-news.comid process . It develops the back portion of the shoulder girdle. The spine (which is situated at the back of the scapula) and also the acromion can be readily palpated on a patient.

*

The flat blade that the scapula glides follow me the ago of the chest enabling for prolonged movement of the arm. The ugandan-news.comraugandan-news.comid process is a special curved structure that tasks from the scapula and also is the attachment point of ligaments and muscles.

You are watching: The acromial end of the clavicle articulates with the ________.

*

The scapula is also marked by a shallow, somewhat ugandan-news.commma-shaped glenoid cavity , i m sorry articulates through the head of the humerus.

*

The top finish of the humerus is ugandan-news.commposed of the head, the neck, the greater and also lesser tubercles, and also the shaft. The head is half-spherical in shape and projects into the glenoid cavity. The neck lies in between the head and the greater and also lesser tubercles. The greater and lesser tubercles are significant landmarks top top the humerus and serve together attachment sites for the rotator cuff muscles.

*

*

*

There space four joints making increase the "shoulder joint":

The shoulder joint itself known as the Glenohumeral joint, (is a ball and socket articulation in between the head the the humerus and also the glenoid cavity the the scapula) The acromioclavicular (AC) joint (where the clavicle meets the acromion that the scapula) The sternoclavicular (SC) joint (where the clavicle meets the chest bone ) The scapulothoracic joint (where the scapula meets through the ribs in ~ the earlier of the chest)

*

Note how the sphere ( head ) the the humerus fits into a shallow socket ~ above the scapula called the glenoid .

See more: Which Brain Structure Receives Information From All The Senses Except Smell?

One have the right to see the this round does no fit right into the glenoid cup in ~ all; this enables for the wide range of movement provided by the shoulder, at the ugandan-news.comst of skeletal stability. Joint security is noted instead by the rotator cuff muscles , related bony processes and also glenohumeral ligaments.