Knowledge

Frontal bone

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The frontal bone is one of the principal paired mid-line bones in dinosaur skulls. This bone is part of the skull roof, which is a set of bones that cover the brain, eyes and nostrils. The frontal makes contact with several other bones in the skull. The anterior part of the bone articulates with
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The border of the squamous part is thick, strongly serrated, bevelled at the expense of the inner table above, where it rests upon the parietal bones, and at the expense of the outer table on either side, where it receives the lateral pressure of those bones; this border is continued below into a
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begins at the end of the first or beginning of the second year, but may begin at birth. The sinuses are of considerable size by the seventh or eighth year, but do not attain their full proportions until after
324:, and backwards to form the orbital plate. The spine is ossified from a pair of secondary centers, on either side of the middle line; similar centers appear in the nasal part and zygomatic processes. 397:
bone. The posterior part of the bone articulates with the postorbital bone and the parietal bone. This bone defines all of part of the upper margin of the orbit.
160: 621: 335:, except at its lower part, by the eighth year, but occasionally persists throughout life. It is generally maintained that the development of the 950: 136: 2012: 1873: 1757: 747: 1556: 1395: 248:. The orbital part is the horizontal and second biggest region of the frontal bone. It enters into the formation of the roofs of the 1476: 1458: 1405: 1289: 558: 490: 237: 201: 584: 1897: 895: 1073: 1051: 997: 1892: 1125: 912: 1674: 1520: 614: 293:. The posterior borders of the orbital plates are thin and serrated, and articulate with the small wings of the sphenoid. 155: 1729: 1316: 1282: 722: 332: 241: 205: 1953: 1697: 1616: 1061: 1977: 1958: 943: 825: 757: 480: 1742: 1737: 1532: 1483: 1447: 1329: 1056: 1007: 607: 167: 119: 1789: 1719: 729: 717: 376:
it is often separated from the orbits by one or two additional bones not found in mammals. These bones, the
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in membrane from two primary centers, one for each half, which appear toward the end of the second month of
1986: 1794: 1709: 1633: 702: 697: 406: 143: 131: 1910: 1822: 1692: 1390: 936: 707: 512: 440: 356:, the frontal bone is paired, rather than presenting the single, fused structure found in humans (see 1935: 1905: 1537: 1493: 1380: 1272: 712: 244:. The squamous part marks the vertical, flat, and also the biggest part, and the main region of the 1920: 1714: 1525: 1255: 1133: 835: 810: 689: 577: 317: 384:, together form the upper margin of the eye sockets, and lie to either side of the frontal bones. 1866: 1827: 1656: 1375: 1046: 980: 802: 917: 830: 320:. From each of these centers, ossification extends upward to form the corresponding half of the 1806: 1628: 1611: 1606: 1564: 1488: 1367: 1198: 1188: 1098: 1081: 862: 815: 782: 554: 531: 486: 465: 445: 302: 51: 1856: 1702: 1687: 1664: 1643: 1638: 1503: 1433: 1385: 1344: 1245: 1232: 1138: 1113: 1017: 852: 847: 752: 521: 413: 321: 1915: 1801: 1772: 1623: 1418: 1413: 1334: 1324: 1299: 1203: 1108: 1086: 1029: 767: 762: 631: 394: 377: 336: 772: 260:, and sometimes this is included with the squamous part. The nasal part is between the 1991: 1777: 1651: 1443: 1438: 1240: 1213: 1154: 1091: 971: 902: 820: 654: 592: 357: 328: 249: 213: 95: 360:). It typically lies on the upper part of the head, between the eyes, but in many non- 39: 2001: 1943: 1925: 1601: 1596: 1578: 1508: 1466: 1428: 1422: 1358: 1339: 1304: 1208: 1193: 1180: 1002: 842: 792: 679: 674: 664: 436: 290: 273: 91: 79: 71: 2008:
Knowledge articles incorporating text from the 20th edition of Gray's Anatomy (1918)
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triangular, rough surface, which articulates with the great wing of the
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which consists of two portions. These are the vertically oriented
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animals it does not form part of the orbital cavity. Instead, in
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Gray's Anatomy E-Book: The Anatomical Basis of Clinical Practice
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The frontal bone is made up of two main parts. These are the
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At birth the bone consists of two pieces, separated by the
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Position of the frontal bone (highlighted in green).
1934: 1882: 1849: 1840: 1815: 1756: 1728: 1673: 1586: 1577: 1555: 1457: 1404: 1366: 1357: 1315: 1231: 1222: 1179: 1147: 1124: 1072: 979: 970: 871: 801: 738: 688: 642: 549:Romer, Alfred Sherwood; Parsons, Thomas S. (1977). 154: 142: 130: 118: 106: 101: 66: 61: 32: 508:"Role of neural crest in congenital heart disease" 216:holding the eye, and part of the bony part of the 220:respectively. The name comes from the Latin word 301:The frontal bone is presumed to be derived from 1547:in petrous part, but not part of temporal bone) 944: 615: 8: 460: 458: 256:. Sometimes a third part is included as the 1846: 1583: 1363: 1228: 976: 951: 937: 929: 622: 608: 600: 50: 38: 525: 1982: 454: 435:This article incorporates text in the 171: 29: 589:Roche Lexicon - illustrated navigator 7: 580:at the SUNY Downstate Medical Center 748:Levator palpebrae superioris muscle 506:Kirby, M. L.; Waldo, K. L. (1990). 479:Standring, Susan (7 August 2015). 331:, which is usually obliterated by 25: 208:, making up the bony part of the 1985: 429: 204:, and the horizontally oriented 1052:Internal occipital protuberance 998:External occipital protuberance 913:Suspensory ligament of eyeball 585:"Anatomy diagram: 34256.000-1" 258:nasal part of the frontal bone 1: 56:Animation of the frontal bone 723:Trochlea of superior oblique 485:. Elsevier Health Sciences. 333:Intramembranous ossification 1617:Posterior clinoid processes 1062:Groove for transverse sinus 443:of the 20th edition of 2029: 2013:Bones of the head and neck 591:. Elsevier. Archived from 404: 268:that articulates with the 826:Accessory lacrimal glands 758:Medial palpebral ligament 272:inferiorly, and with the 264:, and ends in a serrated 166: 49: 37: 1743:Anterior clinoid process 1738:Superior orbital fissure 1484:Internal auditory meatus 1330:Fossa for lacrimal gland 1057:Internal occipital crest 1008:External occipital crest 578:Anatomy photo:23:os-0101 168:Anatomical terms of bone 1720:Sulcus of auditory tube 730:Inferior oblique muscle 718:Superior oblique muscle 527:10.1161/01.CIR.82.2.332 393:the nasal bone and the 27:Bone in the human skull 1634:Middle clinoid process 703:Inferior rectus muscle 698:Superior rectus muscle 407:anatomical terminology 1911:Superior nasal concha 1391:Petrotympanic fissure 708:Lateral rectus muscle 316:life, one above each 1906:Supreme nasal concha 1538:Petrosquamous suture 1494:Stylomastoid foramen 1381:Suprameatal triangle 1273:Supraorbital foramen 713:Medial rectus muscle 308:The frontal bone is 1921:Middle nasal concha 1874:Perpendicular plate 1715:Infratemporal crest 1256:Superciliary arches 1134:Pharyngeal tubercle 811:Lacrimal canaliculi 551:The Vertebrate Body 318:supraorbital margin 212:, part of the bony 1949:ethmoidal foramina 1867:Olfactory foramina 1828:Sphenoidal conchae 1665:Sphenoidal sinuses 1657:Sphenoidal lingula 1376:Articular tubercle 1047:Cruciform eminence 803:Lacrimal apparatus 405:This article uses 303:neural crest cells 70:Twelve bones: the 1973: 1972: 1969: 1968: 1836: 1835: 1662:Anterior surface: 1629:Chiasmatic groove 1612:Hypophysial fossa 1607:Tuberculum sellae 1594:Superior surface: 1573: 1572: 1565:Suprameatal spine 1521:Inferior tympanic 1489:Cochlear aqueduct 1396:Zygomatic process 1353: 1352: 1290:Zygomatic process 1189:Parietal eminence 1175: 1174: 1099:Hypoglossal canal 926: 925: 896:Plica semilunaris 863:Nasolacrimal duct 816:Lacrimal caruncle 783:Palpebral fissure 182: 181: 177: 16:(Redirected from 2020: 1990: 1989: 1981: 1898:Uncinate process 1857:Cribriform plate 1847: 1785:pterygoid plates 1649:Lateral surface: 1639:Petrosal process 1584: 1504:Subarcuate fossa 1434:Occipital groove 1386:Mandibular fossa 1364: 1345:Frontonasal duct 1246:Frontal eminence 1229: 1199:Parietal foramen 1114:Jugular tubercle 1018:Suprainiac fossa 977: 953: 946: 939: 930: 853:Lacrimal punctum 848:Lacrimal papilla 836:Ciaccio's glands 624: 617: 610: 601: 596: 565: 564: 546: 540: 539: 529: 503: 497: 496: 476: 470: 462: 433: 432: 414:Frontal eminence 174:edit on Wikidata 54: 42: 30: 21: 2028: 2027: 2023: 2022: 2021: 2019: 2018: 2017: 1998: 1997: 1996: 1984: 1976: 1974: 1965: 1930: 1916:Superior meatus 1890:Lateral surface 1878: 1832: 1811: 1802:Pterygoid canal 1759: 1752: 1724: 1669: 1624:Ethmoidal spine 1569: 1551: 1533:Styloid process 1453: 1419:Mastoid process 1414:Mastoid foramen 1400: 1349: 1335:Trochlear fovea 1325:Ethmoidal notch 1311: 1300:Sagittal sulcus 1218: 1204:Sagittal sulcus 1171: 1143: 1120: 1109:Jugular process 1087:Condyloid fossa 1068: 966: 957: 927: 922: 918:Tenon's capsule 867: 831:Krause's glands 797: 768:Meibomian gland 763:Epicanthic fold 734: 684: 638: 628: 583: 574: 569: 568: 561: 548: 547: 543: 505: 504: 500: 493: 478: 477: 473: 463: 456: 430: 427: 410: 403: 390: 350: 337:frontal sinuses 299: 286: 234: 194:sincipital bone 178: 57: 45: 28: 23: 22: 15: 12: 11: 5: 2026: 2024: 2016: 2015: 2010: 2000: 1999: 1995: 1994: 1971: 1970: 1967: 1966: 1964: 1963: 1962: 1961: 1956: 1946: 1940: 1938: 1932: 1931: 1929: 1928: 1923: 1918: 1913: 1908: 1903:Medial surface 1900: 1895: 1893:Orbital lamina 1886: 1884: 1880: 1879: 1877: 1876: 1871: 1870: 1869: 1864: 1853: 1851: 1844: 1838: 1837: 1834: 1833: 1831: 1830: 1825: 1819: 1817: 1813: 1812: 1810: 1809: 1804: 1799: 1798: 1797: 1792: 1782: 1781: 1780: 1775: 1764: 1762: 1754: 1753: 1751: 1750: 1745: 1740: 1734: 1732: 1726: 1725: 1723: 1722: 1717: 1712: 1707: 1706: 1705: 1700: 1695: 1690: 1679: 1677: 1671: 1670: 1668: 1667: 1659: 1654: 1652:Carotid groove 1646: 1641: 1636: 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1064: 1059: 1054: 1049: 1039: 1038: 1037: 1032: 1022: 1021: 1020: 1015: 1010: 1005: 1000: 985: 983: 974: 968: 967: 958: 956: 955: 948: 941: 933: 924: 923: 921: 920: 915: 910: 905: 903:Orbital septum 900: 899: 898: 888: 887: 886: 875: 873: 869: 868: 866: 865: 860: 855: 850: 845: 840: 839: 838: 833: 823: 821:Lacrimal gland 818: 813: 807: 805: 799: 798: 796: 795: 790: 785: 780: 775: 773:Ciliary glands 770: 765: 760: 755: 750: 744: 742: 736: 735: 733: 732: 727: 726: 725: 715: 710: 705: 700: 694: 692: 686: 685: 683: 682: 677: 672: 667: 662: 660:Maxillary bone 657: 655:Zygomatic bone 652: 646: 644: 640: 639: 629: 627: 626: 619: 612: 604: 598: 597: 595:on 2012-12-27. 581: 573: 572:External links 570: 567: 566: 559: 541: 520:(2): 332–340. 498: 491: 471: 466:Gray's Anatomy 453: 452: 446:Gray's Anatomy 426: 423: 422: 421: 416: 402: 399: 389: 386: 358:frontal suture 349: 346: 329:frontal suture 298: 295: 285: 282: 254:nasal cavities 233: 230: 214:orbital cavity 196:is a unpaired 180: 179: 170: 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1637: 1635: 1632: 1630: 1627: 1625: 1622: 1618: 1615: 1613: 1610: 1608: 1605: 1603: 1602:Dorsum sellae 1600: 1599: 1598: 1597:Sella turcica 1595: 1592: 1591: 1589: 1585: 1582: 1580: 1576: 1566: 1563: 1562: 1560: 1558: 1557:Tympanic part 1554: 1548: 1546: 1541: 1539: 1536: 1534: 1531: 1527: 1524: 1522: 1519: 1518: 1517: 1514: 1510: 1509:Jugular fossa 1507: 1505: 1502: 1501: 1500: 1497: 1495: 1492: 1490: 1487: 1485: 1482: 1478: 1475: 1474: 1473: 1470: 1468: 1467:Carotid canal 1465: 1464: 1462: 1460: 1456: 1449: 1445: 1442: 1440: 1437: 1435: 1432: 1430: 1429:Mastoid notch 1427: 1424: 1423:Mastoid cells 1420: 1417: 1415: 1412: 1411: 1409: 1407: 1403: 1397: 1394: 1392: 1389: 1387: 1384: 1382: 1379: 1377: 1374: 1373: 1371: 1369: 1368:Squamous part 1365: 1362: 1360: 1356: 1346: 1343: 1341: 1340:Frontal sinus 1338: 1336: 1333: 1331: 1328: 1326: 1323: 1322: 1320: 1318: 1314: 1306: 1305:Frontal crest 1303: 1301: 1298: 1297: 1296: 1293: 1291: 1288: 1284: 1283:Foramen cecum 1281: 1279: 1276: 1274: 1271: 1270: 1269: 1266: 1262: 1259: 1257: 1254: 1253: 1252: 1249: 1247: 1244: 1242: 1239: 1238: 1236: 1234: 1233:Squamous part 1230: 1227: 1225: 1221: 1215: 1212: 1210: 1209:Sagittal keel 1207: 1205: 1202: 1200: 1197: 1195: 1194:Temporal line 1192: 1190: 1187: 1186: 1184: 1182: 1178: 1166: 1163: 1161: 1158: 1157: 1156: 1153: 1152: 1150: 1146: 1140: 1137: 1135: 1132: 1131: 1129: 1127: 1123: 1115: 1112: 1110: 1107: 1106: 1105: 1102: 1100: 1097: 1093: 1090: 1088: 1085: 1084: 1083: 1080: 1079: 1077: 1075: 1074:Lateral parts 1071: 1063: 1060: 1058: 1055: 1053: 1050: 1048: 1045: 1044: 1043: 1040: 1036: 1033: 1031: 1028: 1027: 1026: 1023: 1019: 1016: 1014: 1011: 1009: 1006: 1004: 1003:Occipital bun 1001: 999: 995: 992: 991: 990: 987: 986: 984: 982: 981:Squamous part 978: 975: 973: 969: 965: 961: 954: 949: 947: 942: 940: 935: 934: 931: 919: 916: 914: 911: 909: 906: 904: 901: 897: 894: 893: 892: 889: 885: 882: 881: 880: 877: 876: 874: 870: 864: 861: 859: 856: 854: 851: 849: 846: 844: 843:Lacrimal lake 841: 837: 834: 832: 829: 828: 827: 824: 822: 819: 817: 814: 812: 809: 808: 806: 804: 800: 794: 793:Gland of Zeis 791: 789: 786: 784: 781: 779: 776: 774: 771: 769: 766: 764: 761: 759: 756: 754: 751: 749: 746: 745: 743: 741: 737: 731: 728: 724: 721: 720: 719: 716: 714: 711: 709: 706: 704: 701: 699: 696: 695: 693: 691: 687: 681: 680:Lacrimal bone 678: 676: 675:Palatine bone 673: 671: 668: 666: 665:Sphenoid bone 663: 661: 658: 656: 653: 651: 648: 647: 645: 641: 637: 633: 625: 620: 618: 613: 611: 606: 605: 602: 594: 590: 586: 582: 579: 576: 575: 571: 562: 560:0-03-910284-X 556: 552: 545: 542: 537: 533: 528: 523: 519: 515: 514: 509: 502: 499: 494: 492:9780702068515 488: 484: 483: 475: 472: 468: 467: 461: 459: 455: 451: 450: 447: 444: 442: 438: 437:public domain 424: 420: 417: 415: 412: 411: 408: 400: 398: 396: 387: 385: 383: 379: 375: 371: 367: 363: 359: 355: 348:Other animals 347: 345: 343: 338: 334: 330: 325: 323: 319: 315: 311: 306: 304: 296: 294: 292: 283: 281: 279: 278:maxilla bones 275: 271: 267: 263: 259: 255: 251: 247: 243: 239: 238:squamous part 231: 229: 227: 223: 219: 215: 211: 207: 203: 202:squamous part 199: 195: 191: 187: 175: 169: 165: 162: 159: 157: 153: 150: 147: 145: 141: 138: 135: 133: 129: 126: 123: 121: 117: 114: 111: 109: 105: 100: 97: 93: 89: 85: 81: 77: 73: 69: 67:Articulations 65: 60: 53: 48: 41: 36: 31: 19: 18:Frontal bones 1948: 1902: 1889: 1862:Crista galli 1784: 1767: 1682: 1661: 1648: 1593: 1542: 1515: 1498: 1472:Facial canal 1459:Petrous part 1406:Mastoid part 1317:Orbital part 1294: 1267: 1250: 1223: 1126:Basilar part 1103: 1041: 1024: 1013:Nuchal lines 988: 960:Neurocranium 858:Lacrimal sac 670:Ethmoid bone 650:Frontal bone 649: 593:the original 588: 550: 544: 517: 511: 501: 481: 474: 464: 448: 434: 428: 419:Frontal lobe 391: 382:postfrontals 351: 326: 307: 300: 287: 265: 257: 242:orbital part 235: 221: 206:orbital part 193: 190:frontal bone 189: 183: 137:A02.1.03.001 112: 33:Frontal bone 1748:Optic canal 1730:Small wings 1675:Great wings 891:Conjunctiva 513:Circulation 378:prefrontals 354:vertebrates 297:Development 280:laterally. 270:nasal bones 266:nasal notch 262:brow ridges 186:human skull 113:os frontale 102:Identifiers 2002:Categories 1516:canaliculi 1278:Brow ridge 908:Periorbita 425:References 395:prefrontal 374:amphibians 240:, and the 224:(meaning " 96:zygomatics 90:, the two 86:, the two 82:, the two 78:, the two 1954:Posterior 1936:Labyrinth 1773:Pterygoid 1760:processes 1758:Pterygoid 1165:Opisthion 1030:Occipital 972:Occipital 388:Dinosaurs 370:bony fish 362:mammalian 232:Structure 92:lacrimals 80:parietals 1959:Anterior 1883:Surfaces 1778:Scaphoid 1703:Spinosum 1688:Rotundum 1683:foramina 1587:Surfaces 1579:Sphenoid 1545:ossicles 1359:Temporal 1295:internal 1268:foramina 1261:Glabella 1251:external 1181:Parietal 1042:internal 989:external 441:page 135 401:See also 366:reptiles 352:In most 310:ossified 291:sphenoid 274:lacrimal 246:forehead 226:forehead 210:forehead 88:maxillae 72:sphenoid 1992:Anatomy 1842:Ethmoid 1807:Hamulus 1790:Lateral 1698:Vesalii 1543:(note: 1526:Mastoid 1224:Frontal 1104:jugular 1082:Condyle 962:of the 884:Unibrow 879:Eyebrow 788:Canthus 778:Eyelash 690:Muscles 634:of the 536:2197017 342:puberty 284:Borders 250:orbital 184:In the 125:D005624 76:ethmoid 62:Details 1978:Portal 1850:Plates 1795:Medial 1768:fossae 1644:Clivus 1499:fossae 1477:Hiatus 1448:Aditus 1160:Basion 1139:Clivus 1035:Nuchal 1025:planes 753:Tarsus 740:Eyelid 557:  534:  489:  469:(1918) 449:(1918) 322:squama 188:, the 84:nasals 74:, the 1816:Other 1710:Spine 1693:Ovale 1148:Other 994:Inion 964:skull 872:Other 643:Bones 632:orbit 439:from 314:fetal 222:frons 172:[ 161:52734 108:Latin 1823:Body 630:The 555:ISBN 532:PMID 487:ISBN 380:and 372:and 276:and 252:and 228:"). 218:nose 198:bone 132:TA98 120:MeSH 636:eye 522:doi 192:or 156:FMA 149:520 144:TA2 2004:: 587:. 530:. 518:82 516:. 510:. 457:^ 368:, 344:. 305:. 1980:: 1450:) 1446:( 1425:) 1421:( 996:/ 952:e 945:t 938:v 623:e 616:t 609:v 563:. 538:. 524:: 495:. 409:. 176:] 20:)

Index

Frontal bones


sphenoid
ethmoid
parietals
nasals
maxillae
lacrimals
zygomatics
Latin
MeSH
D005624
TA98
A02.1.03.001
TA2
520
FMA
52734
Anatomical terms of bone
edit on Wikidata
human skull
bone
squamous part
orbital part
forehead
orbital cavity
nose
forehead
squamous part

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