Deltoids Anatomy

Learn about the deltoid its origin insertion and action and all the fun facts in between. Other important bones in the shoulder include.

Figure Anatomical Markers Used To Identify The Deltoid

Deltoids anatomy guide the deltoid is a single joint muscle because it crosses only the shoulder joint.

Deltoids anatomy. As mentioned earlier the deltoid muscle plays a large role in the gross movements. The main muscle of the shoulder anatomy. The very broad origin of the deltoid actually means that functionally the muscle can be broken down into three separate parts.

Anterior border of the lateral third of the clavicle. The acromial middle part. Previous studies showed that the insertion of the intramuscular tendons of the deltoid muscle formed three discrete sets of muscle fibers often referred to as heads.

This is because the deltoids are what you would consider the major muscles of the shoulder anatomy. The deltoid muscle divides into three distinct parts anterior lateral and posterior. The acromion is a bony projection off the scapula.

It is named after the greek letter delta which is shaped like an equilateral triangle. Deltoid muscle cannot initiate abduction because the direction of pull of the deltoid muscle is parallel to the axis of the humerus. The spinal posterior part.

The deltoid muscle is a rounded triangular muscle located on the uppermost part of the arm and the top of the shoulder. Axillary nerve c5 c6. Deltoids anatomy when most people think of the shoulder anatomy they think of the deltoids.

The deltoid is attached by tendons to the skeleton at the clavicle collarbone scapula shoulder blade and humerus upper arm bone. The deltoid tuberosity on the lateral surface of the proximal humeral shaft. The shoulder joint is formed where the humerus upper arm bone fits into the scapula shoulder blade like a ball and socket.

Conditions associated with the deltoid often are related to injury. And with new paints this time. Theyre the muscles you see when you roll up your t shirt sleeve or wear a wife beater.

The clavicular anterior part. When all three parts contracts simultaneously the deltoid will assist in abducting the arm past 15 degrees 9. Each head of the deltoid has slightly different insertion points.

The anterior or clavicular fibers arise from most of the anterior border and upper surface. Abduction of the arm at the shoulder. Cause learning muscle anatomy can be fun.

On the other hand because of its various heads you can work this muscle from plenty of angles by raising your arms in front of you overhead laterally and posteriorly. Lateral or acromial fibers arise. The clavicle collarbone meets the acromion in the acromioclavicular joint.

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