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The Shoulder (Glenohumeral) Joint
…the human body. In this article, we shall look at the anatomy of the shoulder joint – its structure, blood supply, and clinical correlations. Anatomical Structure Articulating Surfaces The shoulder…
The Extrinsic Muscles of the Shoulder
The muscles of the shoulder are associated with movements of the upper limb. They produce the characteristic shape of the shoulder, and can be divided into two groups: Extrinsic –…
The Intrinsic Muscles of the Shoulder
The muscles of the shoulder are associated with movements of the upper limb. They produce the characteristic shape of the shoulder, and can be divided into two groups: Extrinsic –…
The Axillary Nerve
…the humeral surgical neck, shoulder dislocation or iatrogenic injury during shoulder surgery. Motor functions – the deltoid and teres minor muscles will be affected, rendering the patient unable to abduct…
The Sternoclavicular Joint
…movements possible: Elevation of the shoulders – shrugging the shoulders or abducting the arm over 90º Depression of the shoulders – drooping shoulders or extending the arm at the shoulder…
Muscles of the Shoulder Region
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Anatomical Terms of Movement
…from the midline of the body. Abduction is a movement away from the midline – just as abducting someone is to take them away. For example, abduction of the shoulder…
Muscles of the Upper Arm
The upper arm is located between the shoulder joint and elbow joint. It contains four muscles – three in the anterior compartment (biceps brachii, brachialis, coracobrachialis), and one in the…
The Acromioclavicular Joint
The acromioclavicular joint is an articulation in the shoulder region between the clavicle and the acromion of the scapula. It is a plane type synovial joint. In this article, we…
The Musculocutaneous Nerve
…Motor Functions The musculocutaneous nerve innervates the muscles in the anterior compartment of the arm: Biceps brachii Brachialis Coracobrachialis These muscles flex the upper arm at the shoulder and the…