Deltoid

Musculus deltoideus

A thick, triangular muscle covering the shoulder joint. It originates from the lateral third of the clavicle, acromion, and spine of the scapula, and inserts on the deltoid tuberosity of the humerus. Innervated by the axillary nerve (C5, C6).

種類 Muscle
器官系 Muscular
身体部位 Shoulder
ラテン語名 Musculus deltoideus
FMA ID 32521

機能

The primary abductor of the shoulder joint. The anterior fibers flex and medially rotate the arm. The posterior fibers extend and laterally rotate the arm. Gives the shoulder its rounded contour.

臨床的意義

Deltoid paralysis from axillary nerve injury prevents arm abduction. The deltoid is a common site for intramuscular injections. Rotator cuff tears may cause compensatory deltoid overuse.

よくある質問

What is the Deltoid?
A thick, triangular muscle covering the shoulder joint. It originates from the lateral third of the clavicle, acromion, and spine of the scapula, and inserts on the deltoid tuberosity of the humerus. Innervated by the axillary nerve (C5, C6).
What is the function of the Deltoid?
The primary abductor of the shoulder joint. The anterior fibers flex and medially rotate the arm. The posterior fibers extend and laterally rotate the arm. Gives the shoulder its rounded contour.
What body system is the Deltoid part of?
The Deltoid is part of the Muscular.
What conditions affect the Deltoid?
Deltoid paralysis from axillary nerve injury prevents arm abduction. The deltoid is a common site for intramuscular injections. Rotator cuff tears may cause compensatory deltoid overuse.
Where is the Deltoid located?
The Deltoid is located in the Shoulder region of the body.

関連構造

musculature muscle group tendon sheath synovial tendon sheath skeletal system set of all bones and joints orbital septum septum orbitale iliopsoas Hyrtl's muscle myocardium cardiac muscle conducting system of heart cardiac conducting system long head of biceps brachii capus longum of biceps brachii

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