Deltoid muscle
Updates to Article Attributes
Body
was changed:
The deltoid muscle is the largest of the shoulder muscles. The muscle is composed of three heads (clavicular, acromial and spinous), although electromyography suggests that there are at least seven control regions that could act independently 1.
Summary
- origin: lateral 1/3 of the clavicle, acromion, lateral 2/3 of the scapula spine
- insertion: deltoid tuberosity of the humerus
- innervation: axillary nerve (C5-6)
-
arterial supply:2
- acromial and deltoid branches of the thoracoacromial artery
-
anterior and posterior humeral circumflex
humeralarteries - subscapular artery
- deltoid branch of profunda brachii
-
action
- clavicular part: ventral flexion and abduction of the arm
- acromial part: abduction of the arm
- spinous part: dorsal flexion and external rotation of the arm
-<strong>insertion</strong>: <a href="/articles/deltoid-tuberosity">deltoid tuberosity</a> of the <a href="/articles/humerus">humerus</a>- +<strong>insertion</strong>: deltoid tuberosity of the <a href="/articles/humerus">humerus</a>
-<li>acromial and deltoid branches of the <a title="Thoracoacromial artery" href="/articles/thoracoacromial-artery">thoracoacromial artery</a>- +<li>acromial and deltoid branches of the <a href="/articles/thoracoacromial-artery">thoracoacromial artery</a>
-<li>anterior and posterior circumflex humeral arteries</li>-<li><a title="Subscapular artery" href="/articles/subscapular-artery">subscapular artery</a></li>-<li>deltoid branch of <a title="Profunda brachii artery" href="/articles/deep-brachial-artery">profunda brachii</a>- +<li>
- +<a title="Anterior humeral circumflex artery" href="/articles/anterior-humeral-circumflex-artery">anterior</a> and <a title="Posterior humeral circumflex artery" href="/articles/posterior-humeral-circumflex-artery">posterior humeral circumflex arteries</a>
- +</li>
- +<li><a href="/articles/subscapular-artery">subscapular artery</a></li>
- +<li>deltoid branch of <a href="/articles/deep-brachial-artery">profunda brachii</a>
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