Knowledge (XXG)

Triceps

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muscles. It can also fixate the elbow joint when the forearm and hand are used for fine movements, e.g., when writing. It has been suggested that the long head fascicle is employed when sustained force generation is demanded, or when there is a need for a synergistic control of the shoulder and elbow
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Each of the three fascicles has its own motorneuron subnucleus in the motor column in the spinal cord. The medial head is formed predominantly by small type I fibers and motor units, the lateral head of large type IIb fibers and motor units and the long head of a mixture of fiber types and motor
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Madsen M, Marx RG, Millett PJ, Rodeo SA, Sperling JW, Warren RF (November 2006). "Surgical anatomy of the triceps brachii tendon: anatomical study and clinical correlation".
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The triceps can be worked through either isolation or compound elbow extension movements and can contract statically to keep the arm straightened against resistance.
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Inner surface of the Musculus triceps brachii after the humerus was taken away. Note the atypical insertion of the Caput mediale at the Epicondylus medialis humeri.
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or both. The lateral head is used for movements requiring occasional high-intensity force, while the medial fascicle enables more precise, low-force movements.
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Lucas-Osma AM, Collazos-Castro JE (September 2009). "Compartmentalization in the triceps brachii motoneuron nucleus and its relation to muscle architecture".
1862: 587:, elicited by hitting the triceps, is often used to test the function of the nerves of the arm. This tests spinal nerves C6 and C7, predominantly C7. 723: 654:
Many mammals, such as dogs, cattle, and pigs, have a fourth head, the accessory head. It lies between the lateral and medial heads. In humans, the
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Static contraction movements include pullovers, straight-arm pulldowns and bent-over lateral raises, which are also used to build the deltoids and
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In the horse, 84%, 15%, and 3% of the total triceps muscle weight correspond to the long, lateral and medial heads, respectively.
1936: 1415: 1025:"Innervation of the Long Head of the Triceps Brachii in Humans-A Fresh Look: INNERVATION OF THE LONG HEAD OF THE TRICEPS BRACHII" 93: 459:. In rare cases, the long head can originate from the lateral margin of the scapula and from the capsule of the shoulder joint. 1829: 1713: 1708: 1703: 1530: 1387: 699: 1961: 1900: 1857: 1824: 1673: 1668: 1609: 404:
units. It has been suggested that each fascicle "may be considered an independent muscle with specific functional roles."
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Triceps brachii seen from behind. Three different colors represent three different bundles which compose triceps.
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and arm extensions behind the back. Examples of compound elbow extension include pressing movements like the
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With its origin on the scapula, the long head also acts on the shoulder joint and is also involved in
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Ruptures of the triceps muscle are rare, and typically only occur in anabolic steroid users.
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The lateral head arises from the dorsal surface of the humerus, lateral and proximal to the
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All three heads of the triceps brachii are classically believed to be innervated by the
1780: 1348: 1297: 1204: 1180:"Muscle architecture of biceps brachii, triceps brachii and supraspinatus in the horse" 1179: 1106: 1024: 1000: 975: 584: 527: 523: 440: 416: 552: 1989: 1195: 814: 613: 369: 352: 109: 101: 976:"A cadaveric study of ulnar nerve innervation of the medial head of triceps brachii" 960: 904: 1302: 1058: 484: 436: 154: 797: 780: 515: 420: 302: 294: 17: 1642: 1142: 1089: 991: 476: 419:(cushion sacks) are often found. Parts of the common tendon radiates into the 290: 39: 1097: 944: 233: 1073: 617: 600:
It is sometimes called a three-headed muscle (Latin literally three-headed,
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Keener JD, Sethi PM (November 2015). "Distal Triceps Tendon Injuries".
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is sometimes loosely called "the fourth head of the triceps brachii".
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of the arm. It helps stabilise the shoulder joint at the top of the
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Wade, Michael D.; McDowell, Arthur R.; Ziermann, Janine M. (2018).
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arch is frequently the origin of the long head and the tendon of
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from The Department of Radiology at the University of Washington
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Muscles on the dorsum of the scapula, and the triceps brachii.
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The fibers converge to a single tendon to insert onto the
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Erhardt, Alexandra J.; Futterman, Bennett (2017-01-01).
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down to the region of the lateral intermuscular septum.
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Color Atlas of Human Anatomy, Vol. 1: Locomotor System
620:, the triceps brachii is commonly called the triceps. 1165:"The Precise Neurological Exam: Deep Tendon Reflexes" 1950: 1925: 1916: 1883: 1845: 1807: 1798: 1773: 1733: 1682: 1631: 1622: 1588: 1548: 1539: 1524: 1487: 1442: 1414: 1386: 1371: 1338: 1284: 974:Bekler H, Wolfe VM, Rosenwasser MP (January 2009). 779:Casadei, Kyle; Kiel, John; Freidl, Michael (2020). 471:muscle of the elbow joint and an antagonist of the 239: 227: 215: 203: 198: 186: 160: 148: 131: 115: 84: 79: 32: 729:Movement of biceps and triceps when arm is flexing 281:for "three-headed muscle of the arm"), is a large 387:of upper arm. Triceps muscle shown in green text 506:Isolation movements include cable push-downs, 1258: 834: 832: 830: 828: 826: 824: 8: 631:, a form not in general use today; instead, 359:; and its distal part also arises from the 1922: 1804: 1628: 1545: 1536: 1383: 1290: 1265: 1251: 1243: 1078:Clinical Orthopaedics and Related Research 980:Clinical Orthopaedics and Related Research 50: 38: 1203: 1167:. New York University School of Medicine. 1105: 1040: 999: 796: 347:The medial head arises proximally in the 1231:Illustration: upper-body/triceps-brachii 423:of the forearm and can almost cover the 933:The American Journal of Sports Medicine 870: 868: 866: 864: 771: 665: 322:. It extends distally anterior to the 256: 29: 1178:Watson JC, Wilson AM (January 2007). 643:(i.e., when referring to both arms). 7: 1239:at the SUNY Downstate Medical Center 877:The Journal of Comparative Neurology 142:posterior circumflex humeral artery 27:Muscle on the back of the upper arm 25: 623:Historically, the plural form of 44:Triceps brachii seen from behind. 1196:10.1111/j.1469-7580.2006.00669.x 734: 722: 710: 698: 668: 551: 94:infraglenoid tubercle of scapula 785:Current Sports Medicine Reports 1653:extensor carpi radialis longus 1580:flexor digitorum superficialis 314:The long head arises from the 1: 798:10.1249/JSR.0000000000000749 522:(flat, incline or decline), 361:lateral intermuscular septum 305:(straightening of the arm). 1863:flexor digiti minimi brevis 705:Still image. Anterior view. 357:medial intermuscular septum 2022: 1605:flexor digitorum profundus 750: 370:groove of the radial nerve 353:groove of the radial nerve 253:Anatomical terms of muscle 2001:Muscles of the upper limb 1293: 1143:10.1016/j.hcl.2015.06.010 1090:10.1007/s11999-016-5146-z 992:10.1007/s11999-008-0535-6 781:"Triceps Tendon Injuries" 251: 49: 37: 1830:abductor pollicis brevis 1714:extensor pollicis longus 1709:extensor pollicis brevis 1704:abductor pollicis longus 1237:Anatomy photo:06:11-0100 945:10.1177/0363546506288752 919:Skeletal striated muscle 508:lying triceps extensions 210:musculus triceps brachii 351:, just inferior to the 1868:abductor digiti minimi 1858:opponens digiti minimi 1825:flexor pollicis brevis 1674:extensor carpi ulnaris 1669:extensor digiti minimi 1610:flexor pollicis longus 753:anatomical terminology 520:close grip bench press 388: 1743:bicipital aponeurosis 1570:flexor carpi radialis 1029:The Anatomical Record 544:Clinical significance 383: 326:and posterior to the 316:infraglenoid tubercle 193:Biceps brachii muscle 1937:extensor retinaculum 1575:flexor carpi ulnaris 675:Animation. Close up. 174:extends, adducts arm 138:Deep brachial artery 1765:antebrachial fascia 1699:anatomical snuffbox 1510:triangular interval 1467:intermuscular septa 1359:infraspinous fascia 1354:supraspinous fascia 686: Lateral head. 67: Lateral head. 2006:Shoulder extensors 1967:palmar aponeurosis 1962:flexor retinaculum 1942:extensor expansion 1786:osborne's ligament 1664:extensor digitorum 1600:pronator quadratus 1500:quadrangular space 1434:articularis cubiti 1184:Journal of Anatomy 839:Platzer W (2004). 751:This article uses 692: Medial head. 616:, is found on the 563:. You can help by 467:The triceps is an 389: 385:Horizontal section 73: Medial head. 1983: 1982: 1979: 1978: 1975: 1974: 1837:adductor pollicis 1820:opponens pollicis 1794: 1793: 1729: 1728: 1618: 1617: 1520: 1519: 1367: 1366: 917:See the article " 889:10.1002/cne.22123 662:Additional images 581: 580: 267: 266: 262: 16:(Redirected from 2013: 1955: 1930: 1923: 1805: 1721:extensor indicis 1687: 1636: 1629: 1593: 1553: 1546: 1537: 1505:triangular space 1396:coracobrachialis 1384: 1291: 1267: 1260: 1253: 1244: 1218: 1217: 1207: 1175: 1169: 1168: 1161: 1155: 1154: 1126: 1120: 1119: 1109: 1069: 1063: 1062: 1044: 1042:10.1002/ar.23741 1020: 1014: 1013: 1003: 971: 965: 964: 928: 922: 915: 909: 908: 872: 859: 858: 843:(5th ed.). 836: 819: 818: 800: 776: 738: 726: 714: 702: 691: 685: 680: Long head. 679: 672: 576: 573: 555: 548: 535:latissimus dorsi 457:latissimus dorsi 374:greater tubercle 259:edit on Wikidata 144:(long head only) 72: 66: 61: Long head. 60: 54: 42: 30: 21: 2021: 2020: 2016: 2015: 2014: 2012: 2011: 2010: 1996:Elbow extensors 1986: 1985: 1984: 1971: 1951: 1946: 1926: 1912: 1879: 1875:palmaris brevis 1841: 1790: 1769: 1725: 1683: 1678: 1648:brachioradialis 1632: 1614: 1589: 1584: 1565:palmaris longus 1549: 1528: 1516: 1483: 1462:brachial fascia 1457:axillary fascia 1452:axillary sheath 1438: 1424:triceps brachii 1410: 1375: 1363: 1334: 1280: 1271: 1227: 1222: 1221: 1177: 1176: 1172: 1163: 1162: 1158: 1128: 1127: 1123: 1071: 1070: 1066: 1022: 1021: 1017: 973: 972: 968: 939:(11): 1839–43. 930: 929: 925: 916: 912: 874: 873: 862: 855: 838: 837: 822: 778: 777: 773: 768: 756: 749: 742: 739: 730: 727: 718: 715: 706: 703: 694: 693: 689: 687: 683: 681: 677: 673: 664: 649: 598: 593: 577: 571: 568: 561:needs expansion 546: 501: 465: 449: 433: 425:anconeus muscle 411:process of the 400: 397: 394: 391: 343: 340: 337: 334: 311: 275:triceps brachii 263: 104: 96: 75: 74: 70: 68: 64: 62: 58: 45: 28: 23: 22: 18:Triceps brachii 15: 12: 11: 5: 2019: 2017: 2009: 2008: 2003: 1998: 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1411: 1409: 1408: 1403: 1398: 1392: 1390: 1381: 1369: 1368: 1365: 1364: 1362: 1361: 1356: 1351: 1349:deltoid fascia 1345: 1343: 1336: 1335: 1333: 1332: 1327: 1326: 1325: 1320: 1315: 1310: 1300: 1294: 1288: 1282: 1281: 1272: 1270: 1269: 1262: 1255: 1247: 1241: 1240: 1234: 1226: 1225:External links 1223: 1220: 1219: 1170: 1156: 1121: 1084:(1): 247–250. 1064: 1035:(3): 473–483. 1015: 966: 923: 910: 860: 853: 820: 791:(9): 367–372. 770: 769: 767: 764: 763: 762: 748: 745: 744: 743: 740: 733: 731: 728: 721: 719: 716: 709: 707: 704: 697: 695: 688: 682: 676: 674: 667: 663: 660: 648: 645: 597: 594: 592: 589: 585:triceps reflex 579: 578: 558: 556: 545: 542: 524:military press 500: 497: 464: 461: 448: 445: 441:axillary nerve 432: 429: 378: 377: 365: 364: 332: 331: 310: 307: 265: 264: 255: 249: 248: 243: 237: 236: 231: 225: 224: 219: 213: 212: 207: 201: 200: 196: 195: 190: 184: 183: 164: 158: 157: 152: 146: 145: 135: 129: 128: 119: 113: 112: 88: 82: 81: 77: 76: 69: 63: 57: 55: 47: 46: 43: 35: 34: 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106:Medial head: 105: 97: 90: 1330:teres major 1318:teres minor 516:bench press 431:Innervation 372:, from the 328:teres major 324:teres minor 303:elbow joint 295:vertebrates 199:Identifiers 124:process of 1990:Categories 1928:posterior: 1896:interossei 1853:hypothenar 1643:mobile wad 1406:brachialis 766:References 629:tricipites 477:brachialis 291:upper limb 188:Antagonist 108:below the 100:above the 91:Long head: 1953:anterior: 1891:lumbrical 1694:supinator 1624:posterior 1416:posterior 1098:1528-1132 815:221567814 618:lower leg 596:Etymology 489:adduction 453:tendinous 447:Variation 409:olecranon 309:Structure 299:extension 122:Olecranon 117:Insertion 1753:extensor 1541:anterior 1429:anconeus 1388:anterior 1286:Shoulder 1214:17229281 1151:26498552 1116:27830483 1051:29418118 1010:18850256 961:11671310 953:16735585 905:25918513 897:19598170 807:32925376 747:See also 656:anconeus 637:singular 635:is both 499:Training 469:extensor 463:Function 293:of many 181:shoulder 1526:Forearm 1472:lateral 1298:deltoid 1276:of the 1274:Muscles 1205:2100266 1107:5174069 1059:3676096 1001:2600974 633:triceps 625:triceps 608:, from 591:History 512:push up 493:humerus 349:humerus 320:scapula 318:of the 301:of the 289:of the 285:on the 271:triceps 178:extends 170:forearm 167:Extends 162:Actions 80:Details 33:Triceps 1918:fascia 1906:palmar 1901:dorsal 1815:thenar 1758:flexor 1735:fascia 1657:brevis 1495:spaces 1477:medial 1444:fascia 1401:biceps 1340:fascia 1212:  1202:  1149:  1114:  1104:  1096:  1057:  1049:  1008:  998:  959:  951:  903:  895:  851:  845:Thieme 813:  805:  760:Biceps 690:  684:  678:  641:plural 473:biceps 421:fascia 417:bursae 283:muscle 133:Artery 86:Origin 71:  65:  59:  1774:other 1685:deep: 1591:deep: 1488:other 1055:S2CID 957:S2CID 901:S2CID 811:S2CID 610:caput 279:Latin 273:, or 257:[ 246:37688 205:Latin 150:Nerve 1800:Hand 1655:and 1210:PMID 1147:PMID 1112:PMID 1094:ISSN 1047:PMID 1006:PMID 949:PMID 893:PMID 849:ISBN 803:PMID 639:and 627:was 606:ceps 583:The 528:dips 526:and 487:and 475:and 413:ulna 287:back 269:The 234:2471 217:TA98 126:ulna 1373:Arm 1278:arm 1200:PMC 1192:doi 1188:210 1139:doi 1102:PMC 1086:doi 1082:475 1037:doi 1033:301 996:PMC 988:doi 984:467 941:doi 885:doi 881:516 793:doi 602:tri 567:. 241:FMA 229:TA2 1992:: 1208:. 1198:. 1186:. 1182:. 1145:. 1135:31 1133:. 1110:. 1100:. 1092:. 1080:. 1076:. 1053:. 1045:. 1031:. 1027:. 1004:. 994:. 982:. 978:. 955:. 947:. 937:34 935:. 899:. 891:. 879:. 863:^ 847:. 823:^ 809:. 801:. 789:19 787:. 783:. 537:. 518:, 514:, 495:. 451:A 427:. 176:, 140:, 1533:) 1529:( 1380:) 1376:( 1342:: 1266:e 1259:t 1252:v 1216:. 1194:: 1153:. 1141:: 1118:. 1088:: 1061:. 1039:: 1012:. 990:: 963:. 943:: 907:. 887:: 857:. 817:. 795:: 755:. 574:) 570:( 330:. 277:( 261:] 20:)

Index

Triceps brachii


Origin
infraglenoid tubercle of scapula
radial groove
radial groove
Insertion
Olecranon
ulna
Artery
Deep brachial artery
posterior circumflex humeral artery
Nerve
Radial nerve
Actions
Extends
forearm
extends, adducts arm
extends
shoulder
Antagonist
Biceps brachii muscle
Latin
TA98
A04.6.02.019
TA2
2471
FMA
37688

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