Knowledge

Thoracic vertebrae

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convex from side to side in front, deeply concave behind, and slightly constricted laterally and in front. They present, on either side, two costal demi-facets, one above, near the root of the pedicle, the other below, in front of the inferior vertebral notch; these are covered with cartilage in the fresh state, and, when the vertebrae are articulated with one another, form, with the intervening intervertebral fibrocartilages, oval surfaces for the reception of the heads of the ribs.
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resembles the lumbar vertebrae; and by each transverse process being subdivided into three elevations, the superior, inferior, and lateral tubercles: the superior and inferior correspond to the mammillary and accessory processes of the lumbar vertebrae. Traces of similar elevations are found on the transverse processes of the tenth and eleventh thoracic vertebrae.
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The twelfth thoracic vertebra has the same general characteristics as the eleventh, but may be distinguished from it by its inferior articular surfaces being convex and directed lateralward, like those of the lumbar vertebrae; by the general form of the body, laminae, and spinous process, in which it
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arise from the arch behind the superior articular processes and pedicles; they are thick, strong, and of considerable length, directed obliquely backward and lateralward, and each ends in a clubbed extremity, on the front of which is a small, concave surface, for articulation with the tubercle of a
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in the middle of the thoracic region are heart-shaped and as broad in the anteroposterior as in the transverse direction. At the ends of the thoracic region they resemble respectively those of the cervical and lumbar vertebrae. They are slightly thicker behind than in front, flat above and below,
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The tenth thoracic vertebra has an entire articular facet (not demi-facet) on either side, which is placed partly on the lateral surface of the pedicle. It doesn't have any kind of facet below, because the following ribs only have one facet on their heads.
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is long, triangular on coronal section, directed obliquely downward, arising from the lamina and ending in a tuberculated extremity. These processes overlap from the fifth to the eighth, but are less oblique in direction above and below.
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and they are intermediate in size between the cervical and lumbar vertebrae; they increase in size going towards the lumbar vertebrae, with the lower ones being much larger than the upper. They are distinguished by the presence of
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The articular facets for the heads of the ribs are of medium size, and placed chiefly on the pedicles, which are thicker and stronger in this and the next vertebra than in any other part of the thoracic region.
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The ninth thoracic vertebra may have no demi-facets below. In some subjects however, it has two demi-facets on either side; when this occurs the tenth doesn't have facets but demi-facets at the upper part.
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are thin plates of bone projecting upward from the junctions of the pedicles and laminae; their articular facets are practically flat, and are directed backward and a little lateralward and upward.
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are broad, thick, and imbricated – that is to say, they overlap those of subjacent vertebrae like tiles on a roof and connect with the pedicles to surround and protect the spinal cord.
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These are the general characteristics of the second through eighth thoracic vertebrae. The first and ninth through twelfth vertebrae contain certain peculiarities, and are detailed below.
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are fused to a considerable extent with the laminae, and project but slightly beyond their lower borders; their facets are directed forward and a little medialward and downward.
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are directed backward and slightly upward, and the inferior vertebral notches are of large size, and deeper than in any other region of the vertebral column.
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is small, and circular, with two at each intervertebral level, one for the right and one for the left exiting nerve roots.
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The eighth thoracic vertebra is, together with the ninth thoracic vertebra, at the same level as the
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at the level of the 5th thoracic vertebra, but may also end higher or lower, depending on breathing.
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are long, and the upper vertebral notches are deeper than those of the other thoracic vertebrae.
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The body is like that of a cervical vertebra, being broad, concave, and lipped on either side.
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Same as the left, but bones around the thoracic vertebrae are shown as semi-transparent.
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In other animals the number of thoracic vertebrae can vary greatly; for example, most
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are very short, tuberculated at their extremities, and do not have articular facets.
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Knowledge articles incorporating text from the 20th edition of Gray's Anatomy (1918)
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The fifth thoracic vertebra, together with the fourth, is at the same level as the
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The fourth thoracic vertebra, together with the fifth, is at the same level as the
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The first and ninth through twelfth thoracic vertebra have some peculiarities
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Section of the costotransverse joints from the third to the ninth inclusive.
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is the large opening posterior to the vertebral body also known as the
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thoracic vertebrae. Right half of the thoracic skeleton is not shown.
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Vertebral arches of three thoracic vertebrae viewed from the front.
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of all, except the eleventh and twelfth, for articulation with the
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approaches in its form and size to that of the lumbar vertebrae.
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Vertebrae between the cervical vertebrae and the lumbar vertebrae
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at The Anatomy Lesson by Wesley Norman (Georgetown University)
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The first thoracic vertebra has, on either side of the
1938: 520: 557: 887:. Chicago: University of Chicago Press. pp.  446: 1962: 852:The thoracic vertebrae were historically called 606:, and extremes in mammals are marked by certain 504: 458: 360: 336: 283: 759:A typical thoracic vertebra, viewed from above. 477: 434: 407: 395:Surface orientation of T3 and T7, at middle of 348: 296: 540:is short, and nearly horizontal in direction. 1410: 973: 44:Position of the thoracic vertebrae (T1–T12) 1417: 1403: 980: 966: 867:refers to the whole back and not just the 197: 50: 38: 390: 378: 287: 212: 1271:Posterior branches of the lumbar nerves 903:"Physical Characteristics of the Koala" 783:A thoracic vertebra, viewed from below. 771:A thoracic vertebra, viewed from above. 586:have only 11. 12 to 15 is common among 319:is thick, long, and almost horizontal. 169:. In humans, there are twelve thoracic 14: 1963: 1424: 826:This article incorporates text in the 525:In the eleventh thoracic vertebra the 315:are directed upward and backward; the 1398: 1202:Posterior branches of thoracic nerves 1073:Posterior branches of cervical nerves 961: 880: 617: 1382:Posterior branch of coccygeal nerve 1340:Posterior branches of sacral nerves 24: 937:Interactive tool to identify parts 157:compose the middle segment of the 25: 1992: 1185:Thoraco-abdominal nerves – T7–T11 987: 930: 1948: 953:SpineUniverse anatomical diagram 820: 776: 764: 752: 740: 728: 716: 704: 685: 666: 652: 640: 624: 573: 570:(T12) passes out underneath it. 554:(T11) passes out underneath it. 521:Eleventh thoracic vertebra (T11) 517:(T10) passes out underneath it. 673:Animation showing the shape of 653: 558:Twelfth thoracic vertebra (T12) 490:(T9) passes out underneath it. 474:(T8) passes out underneath it. 455:(T7) passes out underneath it. 443:(T6) passes out underneath it. 431:(T5) passes out underneath it. 376:(T4) passes out underneath it. 357:(T3) passes out underneath it. 333:(T1) passes out underneath it. 178:on the sides of the bodies for 917: 895: 884:Comparative Vertebrate Anatomy 874: 846: 635:thoracic vertebrae. Animation. 447:Seventh thoracic vertebra (T7) 13: 1: 1981:Bones of the vertebral column 905:. Australian Koala Foundation 815: 505:Tenth thoracic vertebra (T10) 459:Eighth thoracic vertebra (T8) 401:inferior angle of the scapula 361:Fourth thoracic vertebra (T4) 337:Second thoracic vertebra (T2) 284:Individual thoracic vertebrae 1629:Uncinate process of vertebra 1530:Uncinate process of vertebra 948:Photos at University of Utah 795:Costovertebral articulations 478:Ninth thoracic vertebra (T9) 435:Sixth thoracic vertebra (T6) 408:Fifth thoracic vertebra (T5) 349:Third thoracic vertebra (T3) 297:First thoracic vertebra (T1) 270:inferior articular processes 263:superior articular processes 7: 834:of the 20th edition of 788: 313:superior articular surfaces 186:, as well as facets on the 10: 1997: 1909:Superior thoracic aperture 1899: 1856: 1789: 1780: 1760: 1723:posterior sacral foramina 1667: 1637: 1597: 1520: 1445: 1436: 1355: 1286: 1212: 1098: 995: 131: 119: 107: 95: 83: 71: 66: 61: 49: 37: 32: 1711:anterior sacral foramina 568:thoracic spinal nerve 12 552:thoracic spinal nerve 11 515:thoracic spinal nerve 10 133:Anatomical terms of bone 1180:Intercostobrachial – T2 692:Lateral surface of the 488:thoracic spinal nerve 9 472:thoracic spinal nerve 8 453:thoracic spinal nerve 7 441:thoracic spinal nerve 6 429:thoracic spinal nerve 5 374:thoracic spinal nerve 4 355:thoracic spinal nerve 3 343:thoracic spinal nerve 2 331:thoracic spinal nerve 1 198:General characteristics 1485:Intervertebral foramen 1276:Superior cluneal L1–L3 1083:Greater occipital – C2 881:Hyman, Libbie (1922). 420:divides into two main 404: 388: 387:of a 57-year-old male. 293: 237:intervertebral foramen 218: 1345:Medial cluneal nerves 394: 382: 291: 216: 192:tubercles of the ribs 1740:Lateral sacral crest 1088:Third occipital – C3 545:transverse processes 324:transverse processes 277:transverse processes 188:transverse processes 78:vertebrae thoracicae 1976:Bones of the thorax 1735:Medial sacral crest 1730:Median sacral crest 923:Hyman (1922), p.124 680:thoracic vertebrae. 590:, with 18 to 20 in 1924:Infrasternal angle 1886:Xiphisternal joint 1866:Suprasternal notch 1599:Thoracic vertebrae 1589:Vertebra prominens 1550:Posterior tubercle 1535:Transverse foramen 1522:Cervical vertebrae 805:Cervical vertebrae 405: 389: 294: 219: 163:cervical vertebrae 155:thoracic vertebrae 1936: 1935: 1932: 1931: 1914:Intercostal space 1776: 1775: 1699:sacral tuberosity 1682:sacral promontory 1540:Anterior tubercle 1480:Vertebral foramen 1446:General structure 1392: 1391: 1259:Lumbosacral trunk 1078:Suboccipital – C1 871:part of the back. 723:Vertebral column. 711:Vertebral column. 618:Additional images 383:A thoracic spine 244:vertebral foramen 217:Thoracic vertebra 184:heads of the ribs 147: 146: 142: 18:Thoracic vertebra 16:(Redirected from 1988: 1953: 1952: 1944: 1787: 1786: 1639:Lumbar vertebrae 1545:Carotid tubercle 1443: 1442: 1419: 1412: 1405: 1396: 1395: 1370:Coccygeal plexus 982: 975: 968: 959: 958: 924: 921: 915: 914: 912: 910: 899: 893: 892: 878: 872: 854:dorsal vertebrae 850: 824: 823: 810:Lumbar vertebrae 800:Vertebral column 780: 768: 756: 744: 732: 720: 708: 698: 695: 689: 679: 676: 670: 658: 657: 644: 634: 628: 397:spine of scapula 167:lumbar vertebrae 159:vertebral column 139:edit on Wikidata 136: 54: 42: 30: 29: 21: 1996: 1995: 1991: 1990: 1989: 1987: 1986: 1985: 1961: 1960: 1959: 1947: 1939: 1937: 1928: 1895: 1891:Xiphoid process 1881:Body of sternum 1852: 1772: 1756: 1694:Lateral surface 1663: 1633: 1593: 1516: 1432: 1423: 1393: 1388: 1351: 1282: 1208: 1190:Subcostal – T12 1094: 1059:Brachial plexus 1054:Cervical plexus 991: 986: 933: 928: 927: 922: 918: 908: 906: 901: 900: 896: 879: 875: 851: 847: 821: 818: 791: 784: 781: 772: 769: 760: 757: 748: 745: 736: 733: 724: 721: 712: 709: 700: 696: 693: 690: 681: 677: 674: 671: 662: 659: 648: 645: 636: 632: 629: 620: 576: 560: 538:spinous process 523: 507: 480: 461: 449: 437: 410: 403:, respectively. 363: 351: 339: 317:spinous process 299: 286: 255:spinous process 200: 143: 57: 56:Animation of T2 45: 28: 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1689:Ala of sacrum 1687: 1683: 1680: 1679: 1678: 1675: 1674: 1672: 1670: 1666: 1658: 1655: 1653: 1650: 1649: 1648: 1645: 1644: 1642: 1640: 1636: 1630: 1627: 1623: 1620: 1618: 1615: 1613: 1610: 1609: 1608: 1607:Costal facets 1605: 1604: 1602: 1600: 1596: 1590: 1587: 1583: 1580: 1579: 1578: 1575: 1571: 1568: 1566: 1565:anterior arch 1563: 1561: 1558: 1557: 1556: 1553: 1551: 1548: 1546: 1543: 1541: 1538: 1536: 1533: 1531: 1528: 1527: 1525: 1523: 1519: 1513: 1510: 1506: 1503: 1501: 1498: 1496: 1493: 1492: 1491: 1488: 1486: 1483: 1481: 1478: 1474: 1471: 1469: 1466: 1464: 1461: 1460: 1459: 1456: 1454: 1451: 1450: 1448: 1444: 1441: 1439: 1435: 1431: 1427: 1420: 1415: 1413: 1408: 1406: 1401: 1400: 1397: 1383: 1380: 1379: 1378: 1375: 1371: 1368: 1367: 1366: 1363: 1362: 1360: 1358: 1354: 1346: 1343: 1341: 1338: 1337: 1336: 1333: 1329: 1328:Sacral plexus 1326: 1325: 1324: 1321: 1320: 1317: 1314: 1312: 1309: 1307: 1304: 1302: 1299: 1297: 1294: 1293: 1291: 1289: 1285: 1277: 1274: 1272: 1269: 1268: 1267: 1264: 1260: 1257: 1255: 1254:Lumbar plexus 1252: 1251: 1250: 1247: 1246: 1243: 1240: 1238: 1235: 1233: 1230: 1228: 1225: 1223: 1220: 1219: 1217: 1215: 1211: 1203: 1200: 1199: 1198: 1195: 1191: 1188: 1186: 1183: 1181: 1178: 1176: 1173: 1172: 1171: 1168: 1167: 1164: 1161: 1159: 1156: 1154: 1151: 1149: 1146: 1144: 1141: 1139: 1136: 1134: 1131: 1129: 1126: 1124: 1121: 1119: 1116: 1114: 1111: 1109: 1106: 1105: 1103: 1101: 1097: 1089: 1086: 1084: 1081: 1079: 1076: 1074: 1071: 1070: 1069: 1068: 1064: 1060: 1057: 1055: 1052: 1051: 1050: 1049: 1045: 1044: 1041: 1038: 1036: 1033: 1031: 1028: 1026: 1023: 1021: 1018: 1016: 1013: 1011: 1008: 1006: 1003: 1002: 1000: 998: 994: 990: 989:Spinal nerves 983: 978: 976: 971: 969: 964: 963: 960: 954: 951: 949: 946: 943: 940: 938: 935: 934: 920: 904: 898: 890: 886: 885: 877: 870: 866: 862: 858: 855: 849: 845: 842: 841: 838: 835: 833: 829: 828:public domain 811: 808: 806: 803: 801: 798: 796: 793: 792: 779: 774: 767: 762: 755: 750: 743: 738: 731: 726: 719: 714: 707: 702: 688: 683: 669: 664: 656: 650: 643: 638: 627: 622: 621: 615: 613: 609: 605: 601: 597: 593: 589: 585: 582:have 13, but 581: 574:Other animals 571: 569: 564: 555: 553: 548: 546: 541: 539: 534: 530: 528: 518: 516: 511: 502: 500: 496: 491: 489: 484: 475: 473: 468: 466: 456: 454: 444: 442: 432: 430: 425: 423: 419: 418:human trachea 415: 414:sternal angle 402: 398: 393: 386: 381: 377: 375: 370: 368: 367:sternal angle 358: 356: 346: 344: 334: 332: 327: 325: 320: 318: 314: 309: 306: 304: 290: 281: 278: 273: 271: 266: 264: 259: 256: 251: 249: 245: 240: 238: 233: 231: 226: 224: 215: 211: 208: 203: 195: 193: 189: 185: 181: 177: 172: 168: 164: 160: 156: 152: 140: 134: 130: 127: 124: 122: 118: 115: 112: 110: 106: 103: 100: 98: 94: 91: 88: 86: 82: 79: 76: 74: 70: 65: 60: 53: 48: 41: 36: 31: 19: 1820: 1745:Sacral canal 1646: 1598: 1560:lateral mass 1512:Spinal canal 1489: 1376: 1364: 1334: 1322: 1265: 1248: 1196: 1169: 1065: 1046: 919: 907:. Retrieved 897: 883: 876: 853: 848: 839: 825: 819: 631:Position of 610:with 25 and 600:rhinoceroses 577: 565: 561: 549: 544: 542: 537: 535: 531: 526: 524: 512: 508: 495:xiphisternum 492: 485: 481: 469: 465:xiphisternum 462: 450: 438: 426: 411: 371: 364: 352: 340: 328: 323: 321: 316: 312: 310: 307: 302: 300: 274: 267: 260: 252: 248:spinal canal 247: 241: 234: 227: 220: 204: 201: 180:articulation 154: 148: 102:A02.2.03.001 77: 1175:Intercostal 942:thoraxbones 499:axial plane 151:vertebrates 67:Identifiers 1965:Categories 1809:false ribs 1657:mammillary 1622:transverse 1495:transverse 909:1 February 816:References 580:marsupials 1871:Manubrium 1804:true ribs 1652:accessory 1647:Processes 1500:articular 1490:Processes 1438:Vertebrae 1377:posterior 1357:Coccygeal 1335:posterior 1266:posterior 1197:posterior 1067:posterior 612:cetaceans 604:elephants 182:with the 171:vertebrae 1831:tubercle 1791:Rib cage 1617:inferior 1612:superior 1365:anterior 1323:anterior 1249:anterior 1170:anterior 1100:Thoracic 1048:anterior 997:Cervical 869:thoracic 832:page 102 789:See also 661:3D image 614:with 9. 223:pedicles 165:and the 33:Thoracic 1955:Anatomy 1858:Sternum 1505:spinous 1463:pedicle 1428:of the 588:mammals 422:bronchi 399:and at 230:laminae 90:D013904 62:Details 1941:Portal 1782:Thorax 1762:Coccyx 1669:Sacrum 1468:lamina 1288:Sacral 1214:Lumbar 865:dorsum 856:; cf. 840:(1918) 697:  694:  678:  675:  633:  608:sloths 602:, and 596:tapirs 592:horses 584:koalas 416:. The 207:bodies 176:facets 1826:angle 1821:Parts 1555:Atlas 1473:notch 1430:torso 1426:Bones 830:from 385:X-ray 280:rib. 137:[ 73:Latin 1846:head 1841:neck 1799:Ribs 1769:none 1677:Base 1582:dens 1577:Axis 1458:Arch 1453:Body 911:2012 566:The 550:The 543:The 536:The 527:body 513:The 493:The 486:The 470:The 451:The 439:The 427:The 372:The 353:The 341:The 329:The 322:The 311:The 303:body 275:The 268:The 261:The 253:The 242:The 235:The 228:The 221:The 205:The 126:9139 114:1059 97:TA98 85:MeSH 1163:T12 1158:T11 1153:T10 889:123 149:In 121:FMA 109:TA2 1967:: 1316:S5 1311:S4 1306:S3 1301:S2 1296:S1 1242:L5 1237:L4 1232:L3 1227:L2 1222:L1 1148:T9 1143:T8 1138:T7 1133:T6 1128:T5 1123:T4 1118:T3 1113:T2 1108:T1 1040:C8 1035:C7 1030:C6 1025:C5 1020:C4 1015:C3 1010:C2 1005:C1 598:, 594:, 501:. 467:. 369:. 153:, 1943:: 1418:e 1411:t 1404:v 981:e 974:t 967:v 913:. 891:. 141:] 20:)

Index

Thoracic vertebra


Latin
MeSH
D013904
TA98
A02.2.03.001
TA2
1059
FMA
9139
Anatomical terms of bone
edit on Wikidata
vertebrates
vertebral column
cervical vertebrae
lumbar vertebrae
vertebrae
facets
articulation
heads of the ribs
transverse processes
tubercles of the ribs
bodies

pedicles
laminae
intervertebral foramen
vertebral foramen

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