What part of the body is the deltoid muscle located?
It arises in three distinct sets of fibers: Anterior fiber: from the anterior border and upper surface of the lateral clavicle. Middle fibers: from the lateral margin and upper surface of the acromion Posterior fibers: from the lower lip of the posterior border of the spine of the scapula, as far back as the triangular surface at its medial end. From this extensive origin the fibers converge toward their insertion, the middle passing vertically, the anterior obliquely backward and laterally, the posterior obliquely forward and laterally; they unite in a thick tendon, which is inserted into the V-shaped deltoid tuberosity on the middle of the lateral aspect of the shaft of the humerus. At its insertion the muscle gives off an expansion to the deep fascia of the arm. When all its fibers contract simultaneously, the deltoid is the prime mover of arm abduction along the frontal plane. The arm must be internally rotated. This makes the deltoid an antagonist muscle of the pectoralis major an
The deltoid muscle strain is situated at the big muscle on the shoulder. It has three parts – the front (anterior), middle and back (posterior). The muscle lifts the arm up sideways. The front part helps to lift the arm up forwards (flexion) and the back part helps to lift the arm up backwards (extension). In human anatomy, the deltoid muscle is the muscle forming the rounded contour of the shoulder. It was previously called the Deltoideus and the name is still used by some anatomists. It is called so because it is in the shape of the Greek letter Delta (triangle). The deltoid is a frequent site to administer intra-muscular injections. It arises in three distinct sets of fibers:[1] Anterior fiber: from the anterior border and upper surface of the lateral clavicle. Middle fibers: from the lateral margin and upper surface of the acromion Posterior fibers: from the lower lip of the posterior border of the spine of the scapula, as far back as the triangular surface at its medial end. [edit
In human anatomy, the deltoid muscle is the muscle forming the rounded contour of the shoulder. It was previously called the Deltoideus and the name is still used by some anatomists. It is called so because it is in the shape of the Greek letter Delta (triangle). The deltoid is a frequent site to administer intra-muscular injections. Sources: http://en.wikipedia.
