"Delts" redirects here. For the fraternity, see Delta Tau Delta.
This article uses anatomical terminology.
Deltoid muscle
Deltoid muscle
Muscles connecting the upper extremity to the vertebral column
Origin and insertion of deltoid muscle
Details
Origin
The anterior border and upper surface of the lateral third of the clavicle, acromion, spine of the scapula
Insertion
Deltoid tuberosity of humerus
Artery
Thoracoacromial artery, anterior and posterior humeral circumflex artery
Nerve
Axillary nerve
Actions
Shoulder abduction, flexion and extension
Antagonist
Latissimus dorsi
Identifiers
Latin
musculus deltoideus
MeSH
D057645
TA98
A04.6.02.002
TA2
2452
FMA
32521
Anatomical terms of muscle
[edit on Wikidata]
The deltoid muscle is the muscle 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 appears to be made up of three distinct sets of muscle fibers, namely the
anterior or clavicular part (pars clavicularis)
posterior or scapular part (pars scapularis)
intermediate or acromial part (pars acromialis)
Also the fibres being multipennate.
However, electromyography suggests that it consists of at least seven groups that can be independently coordinated by the nervous system.[1]
It was previously called the deltoideus (plural deltoidei) and the name is still used by some anatomists. It is called so because it is in the shape of the Greek capital letter delta (Δ). Deltoid is also further shortened in slang as "delt".
A study of 30 shoulders revealed an average mass of 191.9 grams (6.77 oz) in humans, ranging from 84 grams (3.0 oz) to 366 grams (12.9 oz).[2]
^Brown, JM; Wickham, JB; McAndrew, DJ; Huang, XF (2007). "Muscles within muscles: Coordination of 19 muscle segments within three shoulder muscles during isometric motor tasks". J Electromyogr Kinesiol. 17 (1): 57–73. doi:10.1016/j.jelekin.2005.10.007. PMID 16458022.
^Potau, JM; Bardina, X; Ciurana, N; Camprubí, D. Pastor JF; de Paz, F. Barbosa M. (2009). "Quantitative Analysis of the Deltoid and Rotator Cuff Muscles in Humans and Great Apes". Int J Primatol. 30 (5): 697–708. doi:10.1007/s10764-009-9368-8. S2CID 634575.
The deltoidmuscle is the muscle forming the rounded contour of the human shoulder. It is also known as the 'common shoulder muscle', particularly in...
skin over the pectoralis major and deltoidmuscles. The rhomboideus is a thick, large muscle below the trapezius muscles. It extends from the vertebral border...
injections include the deltoidmuscle of the upper arm and the gluteal muscle of the buttock. In infants, the vastus lateralis muscle of the thigh is commonly...
of attachment of deltoidmuscle. The deltoid tuberosity has been reported as very prominent in less than 10% of people. The deltoid tuberosity develops...
Deltoid (delta-shaped) can refer to: The deltoidmuscle, a muscle in the shoulder Kite (geometry), also known as a deltoid, a type of quadrilateral A deltoid...
cooperation with the deltoidmuscle to perform abduction, including when the arm is in an adducted position. Beyond 15 degrees, the deltoidmuscle becomes increasingly...
surface of the distal half of the humerus, near the insertion of the deltoidmuscle, which it embraces by two angular processes. Its origin extends below...
called the deltoid tubercle. Middle and inferior fibres of trapezius muscle, and deltoidmuscle, attached to the deltoid tubercle. The deltoid tubercle...
bicipital groove. Muscles from the shoulder region In addition to the four muscles of the rotator cuff, the deltoidmuscle and teres major muscles arise and exist...
responsible for different actions. The clavicular part is close to the deltoidmuscle and contributes to flexion, horizontal adduction, and inward rotation...
platysma muscle is a broad sheet of muscle arising from the fascia covering the upper parts of the pectoralis major muscle and deltoidmuscle. Its fibers...
surface is a rough, rectangular elevation, the deltoid tuberosity for the insertion of the deltoidmuscle; below this is the radial sulcus, directed obliquely...
action known as concavity compression, in order to allow the large deltoidmuscle to further elevate the arm. In other words, without the rotator cuff...
exercise is an isolation exercise that heavily works the posterior deltoidmuscle. The movement is primarily limited to the two shoulder joints: the glenohumeral...
immediately below the clavicle, above the third rib and between the deltoidmuscle laterally and medioclavicular line medially. Supraclavicular fossa This...
humerus, beneath the deltoidmuscle, with the posterior humeral circumflex vessels. It continues as far as the anterior border of the deltoid to provide motor...
subacromial-subdeltoid bursa (SSB). The SSB bursa is located deep to the deltoidmuscle and the coracoacromial arch and extends laterally beyond the humeral...
against the glenoid cavity. Other long muscles such as pectoralis major, latissimus dorsi, teres major and deltoidmuscles also provide support to the shoulder...
The primary function of the teres minor is to modulate the action of the deltoid, preventing the humeral head from sliding upward as the arm is abducted...
deltopectoral groove is an indentation in the muscular structure between the deltoidmuscle and pectoralis major. It is the location through which the cephalic...
with the primary muscles involved being the pectoralis major, the anterior deltoids, and the triceps brachii, alongside other muscles for stabilization...
(superiorly) Lateral border of Pectoralis Major (medially) Medial border of Deltoidmuscle (laterally) It contains the cephalic vein, and deltopectoral fascia...
forward and gives origin to the deltoidmuscle. the posterior border is convex and gives attachment to the trapezius muscle. the inferior surface has a ridge...
branches to the deltoidmuscle (which, however, primarily is supplied by the posterior circumflex humeral artery) and to the muscles between which it...
the deltoidmuscle in the shoulder. One advantage of pennate muscles is that more muscle fibers can be packed in parallel, thus allowing the muscle to...
bipennate muscles. The third type of pennate subgroup is known as the multipennate architecture. These muscles, such as the deltoidmuscle in the shoulder...
is the anterolateral thigh muscle.[medical citation needed] However, these vaccines can be injected into the deltoidmuscle if necessary.[medical citation...
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