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The deltoid muscle is the muscle [1] forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in other animals such as the domestic cat . Anatomically, the deltoid muscle is made up of three distinct sets of muscle fibers , namely the
Because of this symmetry, a kite has two equal angles and two pairs of adjacent equal-length sides. Kites are also known as deltoids, [1] but the word deltoid may also refer to a deltoid curve, an unrelated geometric object sometimes studied in connection with quadrilaterals. [2] [3] A kite may also be called a dart, [4] particularly if it is ...
Deltoid (delta-shaped) can refer to: The deltoid muscle, a muscle in the shoulder; Kite (geometry), also known as a deltoid, a type of quadrilateral; A deltoid curve, a three-cusped hypocycloid; A leaf shape; The deltoid tuberosity, a part of the humerus; The deltoid ligament, a ligament in the ankle
The deltoid muscle covers the shoulder joint on three sides, arising from the front upper third of the clavicle, the acromion, and the spine of the scapula, and travelling to insert on the deltoid tubercle of the humerus. [3]
deltoid means triangular; quadratus means having four sides; rhomboideus means having a rhomboid shape; teres means round or cylindrical, trapezius means having a trapezoid shape, rectus means straight. Examples are the pronator teres, the pronator quadratus and the rectus abdominis. [13] By action
While the anterior deltoids and pectoralis major muscles work to horizontally adduct the upper arms during the upward phase of a push-up, the triceps brachii muscles, or triceps for short, are also hard at work extending the elbow joints so the arms can be fully extended. The triceps also control the speed of elbow-joint flexion during the ...
The axillary nerve supplies two muscles in the arm: deltoid (a muscle of the shoulder) and teres minor (one of the rotator cuff muscles). The axillary nerve also carries sensory information from the shoulder joint. It also innervates the skin, covering the inferior region of the deltoid muscle, known as the regimental badge area. [9]
The third type of pennate subgroup is known as the multipennate architecture. These muscles, such as the deltoid muscle in the shoulder of humans, have fibers that are oriented at multiple angles along the force-generating axis. [1]