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Deltoid muscle

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41: 48: 436: 400: 412: 424: 709:, pecs and lats to internally (medially) rotate the humerus. The intermediate fibers perform basic shoulder abduction when the shoulder is internally rotated, and perform shoulder transverse abduction when the shoulder is externally rotated. They are not utilized significantly during strict transverse extension (shoulder internally rotated) such as in rowing movements, which use the posterior fibers. The posterior fibers assist the 560: 683: 29: 499:
Though traditionally described as a single insertion, the deltoid insertion is divided into two or three discernible areas corresponding to the muscle's three areas of origin. The insertion is an arch-like structure with strong anterior and posterior fascial connections flanking an intervening tissue
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Studies have shown that there are seven neuromuscular segments to the deltoid muscle. Three of these lie in the anatomical anterior head of the deltoid, one in the anatomical middle head, and three in the anatomical posterior head of the deltoid. These neuromuscular segments are supplied by smaller
794:. Deltoidal humeral enthesopathy is an exceedingly rare condition related to mechanical stress. Conversely, deltoideal acromial enthesopathy is likely a hallmark of seronegative spondylarthropathies and its detection should probably be followed by pertinent clinical and serological investigation. 746:
needed for hand and arm manipulation. The intermediate fibers are in the most efficient position to perform this role, though like basic abduction movements (such as lateral raise) it is assisted by simultaneous co-contraction of anterior/posterior fibers.
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When all its fibers contract simultaneously, the deltoid is the prime mover of arm abduction along the frontal plane. The arm must be medially rotated for the deltoid to have maximum effect. This makes the deltoid an antagonist muscle of the
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Site of the intramuscular injection in deltoid: The intramuscular injections are commonly given in the lower half of the deltoid to avoid injury to the axillary nerve, which winds around the surgical neck of the humerus.
825:, the deltoid is much larger than in humans, weighing an average of 383.3 gram compared to 191.9 gram in humans. This reflects the need to strengthen the shoulders, particularly the rotatory cuff, in 778:. Deltoid muscle tears are unusual and frequently related to traumatic shoulder dislocation or massive rotator cuff tears. Muscle atrophy may result from various causes, including aging, disuse, 750:
The deltoid is responsible for elevating the arm in the scapular plane and its contraction in doing this also elevates the humeral head. To stop this compressing against the undersurface of the
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head when a person carries heavy loads. The function of abduction also means that it would help keep carried objects a safer distance away from the thighs to avoid hitting them, as during a
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and subscapularis primarily perform this role. In spite of this there may be still a 1–3 mm upward movement of the head of the humerus during the first 30° to 60° of arm elevation.
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Brown, J M M; Wickham, J B; McAndrew, D J; Huang, X F (2007). "Muscles within muscles: Coordination of 19 muscle segments within three shoulder muscles during isometric motor tasks".
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wing musculature, but in crown-group birds it is strongly reduced, as they favour sternum attached muscles. Some Mesozoic flying theropods, however, had more developed deltoideus.
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Potau, JM; Bardina, X; Ciurana, N; CamprubĂ­, D. Pastor JF; de Paz, F. Barbosa M. (2009). "Quantitative Analysis of the Deltoid and Rotator Cuff Muscles in Humans and Great Apes".
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or clavicular fibers arise from most of the anterior border and upper surface of the lateral third of the clavicle. The anterior origin lies adjacent to the lateral fibers of the
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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".
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The Deltoid Muscle is tested by asking the patient to abduct the arm against resistance applied with one hand, and feeling for the contracting muscle with the other hand.
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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).
1383: 727:, also work in tandem with the posterior deltoid as external (lateral) rotators, antagonists to strong internal rotators like the pecs and lats. 496:; the intermediate fibers passing vertically, the anterior obliquely backward and laterally, and the posterior obliquely forward and laterally. 568:
branches of the axillary nerve, and work in coordination with other muscles of the shoulder girdle include pectoralis major and supraspinatus.
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muscle as do the end tendons of both muscles. These muscle fibers are closely related and only a small chiasmatic space, through which the
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family other than humans. The human deltoid is of similar proportionate size as the muscles of the rotator cuff in apes like the
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Standring, S. (2005). Gray's Anatomy: The Anatomical Basis of Clinical Practice (39th ed.). Elsevier Churchill Livingstone.
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Standring, S. (2005). Gray's Anatomy: The Anatomical Basis of Clinical Practice (39th ed.). Elsevier Churchill Livingstone.
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Arend CF. Ultrasound of the Shoulder. Master Medical Books, 2013. Chapter on deltoideal enthesopathy available at
1948: 1832: 1827: 1822: 1649: 1506: 472: Posterior part of deltoid (arises from the lower lip of the posterior border of the spine of the scapula.) 2080: 545: 2019: 1976: 1943: 1792: 1787: 1728: 225: 1688: 552:
C5 and C6, via the superior trunk, posterior division of the superior trunk, and the posterior cord of the
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and possess the muscle mass needed to support the body weight by the shoulders. In other apes, like the
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Witton, Mark (2013). Pterosaurs: Natural History, Evolution, Anatomy. Princeton University Press.
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suggests that it consists of at least seven groups that can be independently coordinated by the
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Rispoli, Damian M.; Athwal, George S.; Sperling, John W.; Cofield, Robert H. (2009).
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Radiography of the Upper Extremities: 24 ARRT Category A. CE4RT, 2014. 201. Print.
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The most common abnormalities affecting the deltoid are tears, fatty atrophy, and
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From this extensive origin the fibers converge toward their insertion on the
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The axillary nerve is sometimes damaged during surgical procedures of the
528:(acromial and deltoid branches), the circumflex humeral arteries, and the 818: 779: 723: 705:
to flex the shoulder. The anterior deltoid also works in tandem with the
284:. Anatomically, the deltoid muscle is made up of three distinct sets of 1761: 399: 371:
Intermediate or acromial fibers arise from the superior surface of the
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passes, prevents the two muscles from forming a continuous muscle mass.
423: 411: 243: 1361: 1100: 1098: 961:"Morphology of deltoid origin and end tendons â€“ a generic model" 837: 814: 810: 758:, there is a simultaneous contraction of some of the muscles of the 1404: 1232:"Lateral Deltoid Raise - Shoulder Exercise & Workout | MG" 787: 751: 463: 453: 372: 355: 277: 142: 74: 70: 1095: 69:
The anterior border and upper surface of the lateral third of the
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An important function of the deltoid in humans is preventing the
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Muscles connecting the upper extremity to the vertebral column
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apes for the purpose of supporting the entire body weight.
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contributes to the brachial fascia and is connected to the
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Posterior or spinal fibers arise from the lower lip of the
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to extend the shoulder. Other transverse extensors, the
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Leijnse, J N A L; Han, S-H; Kwon, Y H (December 2008).
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during arm adduction. The anterior fibers assist the
947:. Wheeless' Textbook of Orthopaedics. December 2011. 500:
bridge. It additionally gives off extensions to the
832:The deltoid muscle is a main component of both the 2106: 302:The deltoid's fibres are multipennate. However, 254:"Delts" redirects here. For the fraternity, see 298:intermediate or acromial part (pars acromialis) 292:anterior or clavicular part (pars clavicularis) 958: 686:Deltoid muscle with superior limb in abduction 1377: 809:The deltoid is also found in members of the 295:posterior or scapular part (pars scapularis) 1314:Voeten, Dennis F.A.E.; et al. (2018). 1140:Avis, Duncan; Power, Dominic (2018-03-26). 1107:Journal of Electromyography and Kinesiology 952: 1384: 1370: 939: 937: 935: 329:(Δ). Deltoid is also further shortened in 39: 27: 1341: 1331: 1196: 1173: 1139: 984: 544:. The axillary nerve originates from the 769: 681: 558: 46: 932: 899: 897: 895: 893: 2107: 1391: 1313: 1268:Rajput, Vishram singh (15 July 2014). 1267: 1010:"The anatomy of the deltoid insertion" 51:Origin and insertion of deltoid muscle 1365: 1068:at the SUNY Downstate Medical Center 1059: 890: 652:Posterior circumflex humeral vessels 1274:Reed Elsevier India Private Limited 648:Anterior circumflex humeral vessels 276:forming the rounded contour of the 119:posterior humeral circumflex artery 13: 1197:Chaurasia, Bhagwan Din BD (2023). 754:the humeral head and injuring the 14: 2151: 540:The deltoid is innervated by the 977:10.1111/j.1469-7580.2008.01000.x 804: 434: 422: 410: 398: 1307: 1290: 1261: 1249: 1224: 1215: 1190: 1133: 535: 524:The deltoid is supplied by the 519: 1772:extensor carpi radialis longus 1699:flexor digitorum superficialis 1071: 1050: 1001: 855: 1: 1119:10.1016/j.jelekin.2005.10.007 876:10.1016/j.jelekin.2005.10.007 843: 313:It was previously called the 479: 343: 7: 1982:flexor digiti minimi brevis 677: 514:lateral intermuscular septa 492:aspect of the shaft of the 10: 2156: 1724:flexor digitorum profundus 1333:10.1038/s41467-018-03296-8 1158:10.1302/2058-5241.3.170003 260: 253: 238:Anatomical terms of muscle 2140:Shoulder lateral rotators 2115:Muscles of the upper limb 2069: 2044: 2035: 2002: 1964: 1926: 1917: 1892: 1852: 1801: 1750: 1741: 1707: 1667: 1658: 1643: 1606: 1561: 1533: 1505: 1490: 1457: 1412: 1403: 1199:Chaurasia's Human Anatomy 1029:10.1016/j.jse.2008.10.012 918:10.1007/s10764-009-9368-8 348: 236: 224: 212: 200: 188: 176: 171: 159: 136: 124: 104: 88: 63: 58: 38: 26: 21: 2130:Shoulder medial rotators 1949:abductor pollicis brevis 1833:extensor pollicis longus 1828:extensor pollicis brevis 1823:abductor pollicis longus 1066:Anatomy photo:03:03-0103 584:Structures under deltoid 949:Retrieved January 2012. 864:J Electromyogr Kinesiol 672:Coracoacromial ligament 563:Deltoid Muscle Labelled 530:profunda brachii artery 1987:abductor digiti minimi 1977:opponens digiti minimi 1944:flexor pollicis brevis 1793:extensor carpi ulnaris 1788:extensor digiti minimi 1729:flexor pollicis longus 687: 564: 526:thoracoacromial artery 263:anatomical terminology 111:Thoracoacromial artery 52: 1862:bicipital aponeurosis 1689:flexor carpi radialis 1320:Nature Communications 1017:J Shoulder Elbow Surg 770:Clinical significance 685: 562: 488:on the middle of the 50: 2056:extensor retinaculum 1694:flexor carpi ulnaris 756:supraspinatus tendon 502:deep brachial fascia 388:spine of the scapula 1884:antebrachial fascia 1818:anatomical snuffbox 1629:triangular interval 1586:intermuscular septa 1478:infraspinous fascia 1473:supraspinous fascia 504:. Furthermore, the 183:musculus deltoideus 2135:Shoulder extensors 2120:Shoulder abductors 2086:palmar aponeurosis 2081:flexor retinaculum 2061:extensor expansion 1905:osborne's ligament 1783:extensor digitorum 1719:pronator quadratus 1619:quadrangular space 1553:articularis cubiti 1146:EFORT Open Reviews 817:, which engage in 784:muscular dystrophy 744:glenohumeral joint 688: 565: 532:(deltoid branch). 486:deltoid tuberosity 261:This article uses 95:Deltoid tuberosity 53: 2102: 2101: 2098: 2097: 2094: 2093: 1956:adductor pollicis 1939:opponens pollicis 1913: 1912: 1848: 1847: 1737: 1736: 1639: 1638: 1486: 1485: 1283:978-81-312-3729-8 823:common chimpanzee 792:iatrogenic injury 693:pectoralis major 252: 251: 247: 2147: 2125:Shoulder flexors 2074: 2049: 2042: 2041: 1924: 1923: 1840:extensor indicis 1806: 1755: 1748: 1747: 1712: 1672: 1665: 1664: 1656: 1655: 1624:triangular space 1515:coracobrachialis 1503: 1502: 1410: 1409: 1386: 1379: 1372: 1363: 1362: 1356: 1355: 1345: 1335: 1311: 1305: 1294: 1288: 1287: 1265: 1259: 1253: 1247: 1246: 1244: 1243: 1234:. Archived from 1228: 1222: 1219: 1213: 1212: 1194: 1188: 1187: 1177: 1137: 1131: 1130: 1102: 1093: 1092: 1090: 1089: 1079:"Deltoid muscle" 1075: 1069: 1063: 1057: 1054: 1048: 1047: 1045: 1039:. Archived from 1014: 1005: 999: 998: 988: 956: 950: 948: 945:"Deltoid Muscle" 941: 930: 929: 901: 888: 887: 859: 712:latissimus dorsi 703:pectoralis major 698:latissimus dorsi 634:coracobrachialis 631:Latissimus dorsi 621:Pectoralis major 596:Pectoralis minor 471: 461: 451: 438: 426: 414: 402: 361:pectoralis major 304:electromyography 244:edit on Wikidata 241: 166:Latissimus dorsi 43: 31: 19: 18: 2155: 2154: 2150: 2149: 2148: 2146: 2145: 2144: 2105: 2104: 2103: 2090: 2070: 2065: 2045: 2031: 1998: 1994:palmaris brevis 1960: 1909: 1888: 1844: 1802: 1797: 1767:brachioradialis 1751: 1733: 1708: 1703: 1684:palmaris longus 1668: 1647: 1635: 1602: 1581:brachial fascia 1576:axillary fascia 1571:axillary sheath 1557: 1543:triceps brachii 1529: 1494: 1482: 1453: 1399: 1390: 1360: 1359: 1312: 1308: 1295: 1291: 1284: 1266: 1262: 1254: 1250: 1241: 1239: 1230: 1229: 1225: 1220: 1216: 1209: 1195: 1191: 1138: 1134: 1103: 1096: 1087: 1085: 1077: 1076: 1072: 1064: 1060: 1055: 1051: 1043: 1012: 1006: 1002: 957: 953: 943: 942: 933: 902: 891: 860: 856: 846: 827:knuckle walking 807: 772: 680: 644:Triceps brachii 585: 554:brachial plexus 550:cervical nerves 538: 522: 482: 477: 476: 475: 474: 473: 469: 467: 459: 457: 449: 447:Deltoid muscle. 444: 443: 442: 439: 431: 430: 427: 419: 418: 415: 407: 406: 403: 375:process of the 351: 346: 325:capital letter 266: 259: 256:Delta Tau Delta 248: 54: 34: 17: 16:Shoulder muscle 12: 11: 5: 2153: 2143: 2142: 2137: 2132: 2127: 2122: 2117: 2100: 2099: 2096: 2095: 2092: 2091: 2089: 2088: 2083: 2077: 2075: 2067: 2066: 2064: 2063: 2058: 2052: 2050: 2039: 2033: 2032: 2030: 2029: 2028: 2027: 2022: 2012: 2006: 2004: 2000: 1999: 1997: 1996: 1991: 1990: 1989: 1984: 1979: 1968: 1966: 1962: 1961: 1959: 1958: 1953: 1952: 1951: 1946: 1941: 1930: 1928: 1921: 1915: 1914: 1911: 1910: 1908: 1907: 1902: 1900:cubital tunnel 1896: 1894: 1890: 1889: 1887: 1886: 1881: 1880: 1879: 1874: 1867:common tendons 1864: 1858: 1856: 1850: 1849: 1846: 1845: 1843: 1842: 1837: 1836: 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845: 842: 806: 803: 771: 768: 679: 676: 675: 674: 669: 664: 662:Shoulder joint 659: 657:Axillary nerve 654: 649: 646: 641: 639:Biceps brachii 636: 628: 623: 618: 613: 608: 603: 598: 593: 583: 575:, such as for 542:axillary nerve 537: 534: 521: 518: 506:deltoid fascia 481: 478: 468: 458: 448: 446: 445: 440: 433: 432: 428: 421: 420: 416: 409: 408: 404: 397: 396: 395: 394: 393: 392: 391: 386:border of the 380: 369: 350: 347: 345: 342: 308:nervous system 300: 299: 296: 293: 278:human shoulder 270:deltoid muscle 250: 249: 240: 234: 233: 228: 222: 221: 216: 210: 209: 204: 198: 197: 192: 186: 185: 180: 174: 173: 169: 168: 163: 157: 156: 140: 134: 133: 131:Axillary nerve 128: 122: 121: 108: 102: 101: 92: 86: 85: 67: 61: 60: 56: 55: 44: 36: 35: 33:Deltoid muscle 32: 24: 23: 22:Deltoid muscle 15: 9: 6: 4: 3: 2: 2152: 2141: 2138: 2136: 2133: 2131: 2128: 2126: 2123: 2121: 2118: 2116: 2113: 2112: 2110: 2087: 2084: 2082: 2079: 2078: 2076: 2073: 2068: 2062: 2059: 2057: 2054: 2053: 2051: 2048: 2043: 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Index




Origin
clavicle
acromion
spine
scapula
Insertion
Deltoid tuberosity
humerus
Artery
Thoracoacromial artery
anterior
posterior humeral circumflex artery
Nerve
Axillary nerve
Actions
Shoulder
abduction
flexion
extension
Antagonist
Latissimus dorsi
Latin
MeSH
D057645
TA98
A04.6.02.002
TA2

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