Anterior Shoulder Anatomy

The shoulder joint is formed where the humerus upper arm bone fits into the scapula shoulder blade like a ball and socket. Repetitive strain on the muscles like lifting heavy objects or participating in sports that may strain the shoulder joints is another potential cause and arthritis symptoms in the shoulder can also result in pain that radiates from the shoulder to the neck.

Shoulder Anatomy Medical Art Library

The scapula is a triangular shaped bone that functions mainly as a site for muscle attachment.

Anterior shoulder anatomy. Four rotator cuff muscles that act on the shoulder take their origin from the scapula. Located superior to the shoulder joint the deltoid muscle works with the supraspinatus to abduct the arm at the shoulder. Mechanism of anterior shoulder dislocations.

Other important bones in the shoulder include. The shoulder is the group of structures in the region of the joint. In this condition the rotator cuff is unable to support the glenohumeral joint thereby causing pain in the biceps and the shoulder.

In an anterior dislocation the head of the humerus comes to rest inferior to the coracoid process of the scapula. The vast majority of shoulder dislocations are anterior dislocations. Anterior before in front of.

That is there is no. These are the supraspinatus infraspinatus teres minor and subscapularis see the following image. Equally the sternum is anterior to the heart because it lies in front of it.

The acromion is a bony projection off the scapula. Deltoides triangular refers to the front head of the deltoid muscle. Putting this in context the heart is posterior to the sternum because it lies behind it.

The anterior shoulder pain usually develops when injury or inflammation occurs in the tendons that are attached to the shoulder joint. It is a branch of the median nerve which is formed from the roots of the fifth sixth seventh and eighth cervical nerves as well as the first thoracic nerve. On the anterior side of the shoulder the coracobrachialis serratus anterior pectoralis major and pectoralis minor muscles work as a group to flex and adduct the scapula and humerus anteriorly toward the sternum.

Shoulder injuries like fractures bone breakage injured tendons or muscles are the typical causes of anterior shoulder pain. This part of the delt is responsible for shoulder flexion. Anterior dislocations typically result from a direct blow to or a fall on an outstretched arm.

The head of the humerus usually tears the inferior part of the joint capsule because this region is the least protected part of the capsule. The anterior interosseous nerve ain is predominantly a motor neuron. Anterior ventral refers to the front and posterior dorsal refers to the back.

Shoulder anatomy lateral view. The clavicle collarbone meets the acromion in the acromioclavicular joint. In human anatomy the shoulder joint comprises the part of the body where the humerus attaches to the scapula the head sitting in the glenoid cavity.

The anterior deltoid l.

Shoulder Muscles Attachment Nerve Supply Action