Knowledge (XXG)

Petrous part of the temporal bone

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comparing DNA from different skeletal sites concluded that "The inner part of petrous bones and the cementum layer in teeth roots are currently recognized as the best substrates for (ancient DNA) research ... Both substrates display significantly higher endogenous DNA content (average of 16.4% and 40.0% for teeth and petrous bones, respectively) than parietal skull bone (average of 2.2%)."
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is intermediate in length between the superior and the anterior. Its medial half is marked by a sulcus, which forms, with a corresponding sulcus on the occipital bone, the channel for the inferior petrosal sinus. Its lateral half presents an excavation — the jugular fossa — which, with the jugular
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In ancient DNA studies, scientists extract and sequence DNA from ancient skeletal remains of humans and other species. In many cases the DNA is highly degraded, and contaminated by DNA from soil microbes. In 2015 it was found that the petrous bone has remarkably well-preserved DNA. A 2017 study
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Pinhasi R, Fernandes D, Sirak K, Novak M, Connell S, Alpaslan-Roodenberg S, Gerritsen F, Moiseyev V, Gromov A, Raczky P, Anders A, Pietrusewsky M, Rollefson G, Jovanovic M, Trinhhoang H, Bar-Oz G, Oxenham M, Matsumura H, Hofreiter M (18 June 2015).
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Behind the internal acoustic meatus is a small slit almost hidden by a thin plate of bone, leading to a canal, the aquæductus vestibuli, which transmits the ductus endolymphaticus together with a small artery and vein.
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At the angle of junction of the petrous and the squamous parts are two canals, one above the other, and separated by a thin plate of bone, the septum canalis musculotubarii; both canals lead into the tympanic cavity.
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is divided into two parts—a lateral joined to the squamous part by a suture (petrosquamous), the remains of which are more or less distinct; a medial, free, which articulates with the spinous process of the sphenoid.
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Above and between these two openings is an irregular depression that lodges a process of the dura mater and transmits a small vein; in the infant, this depression is represented by a large fossa, the
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and the superior and lateral semicircular ducts, and, in front, the area facialis, with one large opening, the commencement of the canal for the facial nerve (aquæductus Fallopii).
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a short canal, about 1 cm. in length, which runs lateralward. It transmits the facial and acoustic nerves and the internal auditory branch of the
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notch on the occipital, forms the jugular foramen; an eminence occasionally projects from the center of the fossa, and divides the foramen into two.
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Bones of the front of the skull, viewed from behind (interior surface). The petrous part of the temporal is labeled in the lower left.
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The petrous bone is important for studies of ancient DNA from skeletal remains, as it tends to contain extremely well-preserved DNA.
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Another view of the bones of the front of the skull, viewed from behind, with the petrous part of the temporal labeled bilaterally.
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Anterior inferior cribriform area, with (5’) the tractus spiralis foraminosus, and (5’’) the canalis centralis of the cochlea.
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is rough and irregular, and forms part of the exterior of the base of the skull. It presents eleven points for examination:
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presents behind, the area cribrosa superior, pierced by a series of small openings, for the passage of the nerves to the
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of the base of the skull, and is continuous with the inner surface of the squamous portion, to which it is united by the
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The apex, which is rough and uneven, is received into the angular interval between the posterior border of the
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Hansen HB, Damgaard PB, Margaryan A, Stenderup J, Lynnerup N, Willerslev E, Allentoft ME (27 January 2017).
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The lateral end of the canal is closed by a vertical plate, which is divided by a horizontal crest, the
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near the apex is a rough surface, quadrilateral in form, which serves partly for the attachment of the
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are three sets of foramina; these openings together with this central canal transmit the nerves to the
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Consequently, petrous bones are now the most widely-used skeletal site for the study of ancient DNA.
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a shallow groove, sometimes double, leading lateralward and backward to an oblique opening, the
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medial to the opening for the carotid canal and close to its posterior border, in front of the
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in front of and a little lateral to this eminence, a depression indicating the position of the
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Each portion is further subdivided by a vertical ridge into an anterior and a posterior part.
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of the base of the skull, and is continuous with the inner surface of the mastoid portion.
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Knowledge (XXG) articles incorporating text from the 20th edition of Gray's Anatomy (1918)
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the lower one (semicanalis tubae auditivae) forms the bony part of the auditory tube.
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lateral to the hiatus, a smaller opening, occasionally seen, for the passage of the
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in the bony ridge dividing the carotid canal from the jugular fossa is the small
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Ridge separating the tractus spiralis foraminosus from the area cribrosa media
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above this canal the shallow trigeminal impression for the reception of the
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one group, just below the posterior part of the crest, situated in the
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situated between the tympanic portion and the mastoid process is the
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Ridge separating the area facialis from the area cribrosa superior
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Posterior borders of the petrous part of the temporal bone in the
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The upper one (semicanalis m. tensoris tympani) transmits the
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Area cribrosa superior, with (4’) openings for nerve filaments
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Area cribrosa media, with (7’) orifices for nerves to saccule
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Area facialis, with (2’) internal opening of the facial canal
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behind the jugular fossa is a quadrilateral area, the
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is pyramid-shaped and is wedged in at the base of the
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through the intervention of some dense fibrous tissue
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The anterior surface forms the posterior part of the
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Dissection of the muscles of the palate from behind.
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The base is fused with the internal surfaces of the
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Petrous comes from the Latin word 18:Petrous portion of the temporal bone 684:Petrous bone in ancient DNA studies 561:auricular branch of the vagus nerve 377:portion beneath the falciform crest 721:Base of the skull. Upper surface. 636:, the longest, is grooved for the 401:, or opening for the nerve to the 397:below and behind this area is the 25: 302:lesser superficial petrosal nerve 292:hiatus for greater petrosal nerve 60:Petrous part of the temporal bone 33:Petrous part of the temporal bone 2025: 945: 762: 750: 738: 726: 714: 709:Base of skull. Inferior surface. 702: 1092:Internal occipital protuberance 1038:External occipital protuberance 597:; it is the termination of the 342:forms the anterior part of the 640:, and gives attachment to the 1: 543:inferior tympanic canaliculus 368:, into two unequal portions. 82:pars petrosa ossis temporalis 916:10.1371/journal.pone.0170940 857:10.1371/journal.pone.0129102 586:between these laminæ is the 410:tractus spiralis foraminosus 1657:Posterior clinoid processes 1102:Groove for transverse sinus 959:of the 20th edition of 443:superior semicircular canal 403:posterior semicircular duct 275:superior semicircular canal 2074: 2053:Bones of the head and neck 414:canalis centralis cochleæ 351:internal acoustic opening 135: 53: 37: 1783:Anterior clinoid process 1778:Superior orbital fissure 1524:Internal auditory meatus 1370:Fossa for lacrimal gland 1097:Internal occipital crest 1048:External occipital crest 808:3D4Medical from Elsevier 559:for the entrance of the 355:internal auditory meatus 137:Anatomical terms of bone 1760:Sulcus of auditory tube 638:superior petrosal sinus 545:for the passage of the 344:posterior cranial fossa 332:posterior cranial fossa 1674:Middle clinoid process 615:, for the exit of the 613:tympanomastoid fissure 551:glossopharyngeal nerve 335: 1951:Superior nasal concha 1431:Petrotympanic fissure 537:internal jugular vein 489:Levator veli palatini 329: 269:near the center, the 1946:Supreme nasal concha 1578:Petrosquamous suture 1534:Stylomastoid foramen 1421:Suprameatal triangle 1313:Supraorbital foramen 601:, and transmits the 595:stylomastoid foramen 334:shown at (2) in blue 263:petrosquamous suture 259:middle cranial fossa 2058:Otorhinolaryngology 1961:Middle nasal concha 1914:Perpendicular plate 1755:Infratemporal crest 1296:Superciliary arches 1174:Pharyngeal tubercle 907:2017PLoSO..1270940H 848:2015PLoSO..1029102P 642:tentorium cerebelli 607:stylomastoid artery 557:mastoid canaliculus 388:area cribrosa media 315:trigeminal ganglion 1989:ethmoidal foramina 1907:Olfactory foramina 1868:Sphenoidal conchae 1705:Sphenoidal sinuses 1697:Sphenoidal lingula 1416:Articular tubercle 1087:Cruciform eminence 801:"Complete Anatomy" 523:subarachnoid space 519:aquæductus cochleæ 470:Foramen singulare. 336: 2013: 2012: 2009: 2008: 1876: 1875: 1702:Anterior surface: 1669:Chiasmatic groove 1652:Hypophysial fossa 1647:Tuberculum sellae 1634:Superior surface: 1613: 1612: 1605:Suprameatal spine 1561:Inferior tympanic 1529:Cochlear aqueduct 1436:Zygomatic process 1393: 1392: 1330:Zygomatic process 1229:Parietal eminence 1215: 1214: 1139:Hypoglossal canal 696:Additional images 399:foramen singulare 340:posterior surface 322:Posterior surface 151: 150: 146: 16:(Redirected from 2065: 2030: 2029: 2021: 1938:Uncinate process 1897:Cribriform plate 1887: 1825:pterygoid plates 1689:Lateral surface: 1679:Petrosal process 1624: 1544:Subarcuate fossa 1474:Occipital groove 1426:Mandibular fossa 1404: 1385:Frontonasal duct 1286:Frontal eminence 1269: 1239:Parietal foramen 1154:Jugular tubercle 1058:Suprainiac fossa 1017: 993: 986: 979: 970: 949: 948: 939: 938: 928: 918: 886: 880: 879: 869: 859: 826: 820: 819: 817: 815: 810:. Elsevier. 2023 805: 797: 766: 754: 742: 730: 718: 706: 646:trigeminal nerve 617:auricular branch 527:internal jugular 481:inferior surface 475:Inferior surface 439:subarcuate fossa 271:arcuate eminence 253:Anterior surface 143:edit on Wikidata 58: 48:. Outer surface. 42: 30: 21: 2073: 2072: 2068: 2067: 2066: 2064: 2063: 2062: 2038: 2037: 2036: 2024: 2016: 2014: 2005: 1970: 1956:Superior meatus 1930:Lateral surface 1918: 1872: 1851: 1842:Pterygoid canal 1799: 1792: 1764: 1709: 1664:Ethmoidal spine 1609: 1591: 1573:Styloid process 1493: 1459:Mastoid process 1454:Mastoid foramen 1440: 1389: 1375:Trochlear fovea 1365:Ethmoidal notch 1351: 1340:Sagittal sulcus 1258: 1244:Sagittal sulcus 1211: 1183: 1160: 1149:Jugular process 1127:Condyloid fossa 1108: 1006: 997: 946: 943: 942: 901:(1): e0170940. 888: 887: 883: 842:(6): e0129102. 828: 827: 823: 813: 811: 803: 799: 798: 794: 789: 777: 770: 767: 758: 755: 746: 743: 734: 731: 722: 719: 710: 707: 698: 686: 653:posterior angle 630: 588:styloid process 581:vaginal process 571:jugular process 567:jugular surface 547:tympanic branch 477: 449:Falciform crest 366:falciform crest 324: 282:tympanic cavity 255: 250: 242:foramen lacerum 218: 198: 171:occipital bones 147: 61: 49: 28: 23: 22: 15: 12: 11: 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1083: 1080: 1076: 1073: 1071: 1068: 1067: 1066: 1063: 1059: 1056: 1054: 1051: 1049: 1046: 1044: 1043:Occipital bun 1041: 1039: 1035: 1032: 1031: 1030: 1027: 1026: 1024: 1022: 1021:Squamous part 1018: 1015: 1013: 1009: 1005: 1001: 994: 989: 987: 982: 980: 975: 974: 971: 967: 966: 963: 960: 958: 954: 953:public domain 936: 932: 927: 922: 917: 912: 908: 904: 900: 896: 892: 885: 882: 877: 873: 868: 863: 858: 853: 849: 845: 841: 837: 833: 825: 822: 809: 802: 796: 793: 786: 782: 779: 778: 774: 765: 760: 753: 748: 745:Temporal bone 741: 736: 729: 724: 717: 712: 705: 700: 695: 693: 690: 683: 678: 675: 671: 670: 669: 665: 662: 657: 654: 649: 647: 643: 639: 635: 627: 622: 618: 614: 610: 608: 604: 600: 596: 592: 589: 585: 582: 578: 576: 572: 568: 564: 562: 558: 554: 552: 548: 544: 540: 538: 534: 533:jugular fossa 530: 528: 524: 520: 516: 515:jugular fossa 512: 509: 508:carotid canal 505: 502: 498: 494: 493:auditory tube 490: 486: 485: 484: 482: 474: 469: 466: 463: 460: 457: 454: 451: 448: 447: 446: 444: 440: 435: 428: 424: 420: 415: 411: 407: 404: 400: 396: 393: 389: 385: 384: 382: 378: 374: 373: 372: 369: 367: 362: 360: 356: 352: 347: 345: 341: 333: 328: 321: 316: 312: 309: 308:carotid canal 305: 303: 299: 297: 293: 289: 287: 283: 279: 276: 272: 268: 267: 266: 264: 260: 252: 247: 245: 243: 239: 238:carotid canal 235: 231: 227: 226:sphenoid bone 223: 215: 213: 211: 210:mastoid parts 207: 203: 195: 193: 190: 188: 187:petrosal bone 184: 180: 176: 172: 168: 164: 160: 159:temporal bone 156: 144: 138: 134: 131: 128: 126: 122: 119: 116: 114: 110: 107: 104: 102: 98: 95: 92: 90: 86: 83: 80: 78: 74: 69: 64: 57: 52: 47: 46:temporal bone 41: 36: 31: 19: 1988: 1942: 1929: 1902:Crista galli 1824: 1807: 1722: 1701: 1688: 1633: 1582: 1555: 1538: 1512:Facial canal 1499:Petrous part 1498: 1446:Mastoid part 1357:Orbital part 1334: 1307: 1290: 1166:Basilar part 1143: 1081: 1064: 1053:Nuchal lines 1028: 1000:Neurocranium 964: 950: 944: 898: 894: 884: 839: 835: 824: 812:. Retrieved 807: 795: 691: 687: 666: 660: 658: 652: 650: 633: 631: 603:facial nerve 599:facial canal 497:basilar part 480: 478: 436: 432: 422: 376: 370: 363: 348: 339: 337: 285: 256: 230:basilar part 219: 199: 191: 186: 182: 165:between the 155:petrous part 154: 152: 106:A02.1.06.002 81: 1788:Optic canal 1770:Small wings 1715:Great wings 621:vagus nerve 179:endocranium 71:Identifiers 2042:Categories 1556:canaliculi 1318:Brow ridge 804:(Software) 787:References 222:great wing 1994:Posterior 1976:Labyrinth 1813:Pterygoid 1800:processes 1798:Pterygoid 1205:Opisthion 1070:Occipital 1012:Occipital 814:1 January 175:inner ear 1999:Anterior 1923:Surfaces 1818:Scaphoid 1743:Spinosum 1728:Rotundum 1723:foramina 1627:Surfaces 1619:Sphenoid 1585:ossicles 1399:Temporal 1335:internal 1308:foramina 1301:Glabella 1291:external 1221:Parietal 1082:internal 1029:external 957:page 142 935:28129388 895:PLOS ONE 876:26086078 836:PLOS ONE 775:See also 248:Surfaces 228:and the 206:tympanic 202:squamous 183:petrosus 167:sphenoid 2032:Anatomy 1882:Ethmoid 1847:Hamulus 1830:Lateral 1738:Vesalii 1583:(note: 1566:Mastoid 1264:Frontal 1144:jugular 1122:Condyle 1002:of the 926:5271384 903:Bibcode 867:4472748 844:Bibcode 619:of the 573:of the 549:of the 499:of the 427:utricle 392:saccule 381:cochlea 375:In the 232:of the 224:of the 157:of the 94:D010579 66:Details 2018:Portal 1890:Plates 1835:Medial 1808:fossae 1684:Clivus 1539:fossae 1517:Hiatus 1488:Aditus 1200:Basion 1179:Clivus 1075:Nuchal 1065:planes 965:(1918) 933:  923:  874:  864:  648:lies. 628:Angles 208:, and 1856:Other 1750:Spine 1733:Ovale 1188:Other 1034:Inion 1004:skull 955:from 163:skull 141:[ 130:52871 77:Latin 44:Left 1863:Body 931:PMID 872:PMID 816:2024 659:The 651:The 632:The 605:and 479:The 421:The 338:The 216:Apex 196:Base 169:and 153:The 101:TA98 89:MeSH 921:PMC 911:doi 862:PMC 852:doi 125:FMA 118:642 113:TA2 2044:: 929:. 919:. 909:. 899:12 897:. 893:. 870:. 860:. 850:. 840:10 838:. 834:. 806:. 445:. 383:. 361:. 244:. 212:. 204:, 189:. 2020:: 1490:) 1486:( 1465:) 1461:( 1036:/ 992:e 985:t 978:v 937:. 913:: 905:: 878:. 854:: 846:: 818:. 676:. 623:. 416:. 405:; 394:; 317:. 277:. 145:] 20:)

Index

Petrous portion of the temporal bone

temporal bone

Latin
MeSH
D010579
TA98
A02.1.06.002
TA2
642
FMA
52871
Anatomical terms of bone
edit on Wikidata
temporal bone
skull
sphenoid
occipital bones
inner ear
endocranium
squamous
tympanic
mastoid parts
great wing
sphenoid bone
basilar part
occipital bone
carotid canal
foramen lacerum

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