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The deltoid muscle is the muscle [citation needed] 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 anterior or clavicular part (pars ...
The middle (middle) deltoid: Responsible for shoulder abduction (lifting the arm away from the body). The posterior (back) deltoid: Assists with shoulder extension and outward rotation.
In human anatomy, the deltoid tuberosity is a rough, triangular [1] area on the antero lateral (front-side) surface of the middle of the humerus. [2] It is a site of attachment of deltoid muscle . [ 2 ]
of or pertaining to the shoulder (or [rarely] the upper arm) Latin umerus, shoulder humerus: hydr(o)-water Greek ὕδωρ (húdōr), water hydrophobe, hydrogen hyper-extreme or beyond normal Greek ὑπέρ (hupér), over, above; beyond, to the extreme hypertension, hypertrichosis: hyp(o)-below normal Greek ὑπό, ὑπο-(hupó), below, under
Subacromial bursitis is a condition caused by inflammation of the bursa that separates the superior surface of the supraspinatus tendon (one of the four tendons of the rotator cuff) from the overlying coraco-acromial ligament, acromion, and coracoid (the acromial arch) and from the deep surface of the deltoid muscle. [1]
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
A variety of methods may be used to diagnose axillary nerve palsy. The health practitioner may examine the shoulder for muscle atrophy of the deltoid muscle. [2] Furthermore, a patient can also be tested for weakness when asked to raise the arm. [2] The deltoid extension lag sign test is one way to evaluate the severity of the muscle weakness.
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]