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Nose (contd.), alar sulcus of, 799

arteries of, 805
bridge of, 799
cartilages of, 800
cavity of, 801
choanæ of, 175, 185, 196

surgical anatomy of, 1246
development of, 49
digital exploration of, 1378
external, 799
floor of, 804
hiatus semilunaris of, 803
infundibulum of, 803
lateral wall of, 802
Jimen of, 802
lymph vessels of, 1004
meatuses of, 803
mucous membrane of, 804
muscles of, 450

action of, 452

nerve-supply of, 452
nasal index of, 799
nerves of, 805
olfactory part of, 804
outer parts of, 799
piriform openings of, 163
recessus spheno-ethmoidalis of, 802
respiratory part of, 804
septum of, 802

surgical anatomy of, 1378
veins of, 806
vessels of, 805

vestibule of, 802
Nostril, 799
Notch, acetabular, of ischium, 232

variations in, 281
cardiac, of lung, 1095
of cerebellum, 574
ethmoidal, 116
greater sciatic, of ilium, 229
infra-sternal, 1397, 1407
intercondylic, of femur, 243
jugular, 107
mandibular, 156
nasal, 115
pterygoid, 137
pterygo-palatine, 151
radial, 211
of Rivinus, 834
of sacrum, 96
scapular, 201, 203

great, 202
sciatic, 229, 232
semilunar, 211
of spleen, 1352
supraorbital, 116
suprasternal, 107
ulnar of radius, 215
umbilical, 1191
Notochord, 23, 24, 290

formation of, 24

remnants of, 25
Nuchal furrow, 1395
lines, 166, 171

of occipital bone, 121
plane of occipital bone, 121
Nuck, canal of, 1319
Nuclear juice, 8

layer of retina, 816, 817

membrane, 8, 9
Nucleolus, 8, 9, 10

false, 8

Nucleus, 8
Nucleus or Nuclei, of abducens nerve, 600

relation of, to medial longitudina!

bundle, 588, 600
accessory, 560, 595
of acoustic nerve, 604-606
ambiguus, 595, 596
amygdala, 641
anterior, of thalamus, 612
arcuate, 552, 563

development of, 552
of thalamus, 612
of Bechterew, 605
caudate, 635, 637
of cells, 8

during mitosis, 9, 13

segmentation, 10
central, of Luys, 612
cochlear, 554, 604

development of, 684
colliculi inferioris, 585
corporis geniculati lateralis, 613

medialis, 607
mamillaris, 615
of corpus trapezoideum, 606
cuneate, 533, 547, 560

development of, 552

relation of, to arcuate fibres, 560
of Deiters, 605

function of, 605
dentate, 576
dorsalis, 531
emboliformis, of cerebellum, 577
of facial, 599
fastigii, 577
fertilisation of, 20
first segmentation, 21
of funiculus solitarius, 598
globosus, 577
glossopharyngeal, 596-598

relation of, to fourth ventricle, 596
gracilis, 547
relation of, to arcuate fibres, 560

to lemniscus, 559
hypoglossal, 594

relation of, to fourth ventricle, 594
hypothalamicus, 614
intercalatus, 551
laryngeal, 598
of lateral lemniscus, 606
lentiform, 638
lentis, 520
of Luys, 614
medial, of thalamus, 611
of medulla oblongata, 551

development of, 551, 592
of mesencephalon, 584, 585, 586, 588
motor, 592
motorius nervi trigemini, 601
oculo-motor, 603
olivary, accessory, 556
inferior, 556

relation of, to cerebello-olivary fibres, 556

surface elevation of, 547
superior, 567, 606

pedicle of, 606
relation of, to corpus trapezoideum, 6178

to lateral lemniscus, 606

to nucleus of lateral lemniscus, 606
of optic nerve, 620
of origin, 592
of origin of cerebral nerves, 592

Nucleus or Nuclei, of origin (contd.), develop-

ment of, 592
pontis, 566

development of, 566

relation of, to transverse fibres of pons, 566
pulposus, 307
radicis descendentis nervi trigemini, 559
red, 613
roof, 577

relation of, to spino-cerebellar tract, 578
ruber, 586-588

origin of, 516
segmentation, 21
somatic afferent terminal, 506

efferent, 506
splanchnic afferent terminal, 506

efferent, 506
of tegmentum, 586
terminal, 505
of termination of nerves, 593
of thalamus, 611
tractus solitarii, 598

spinalis nervi trigemini, 559
trigeminal, 600

development of, 683
trochlear, 602
relation of, to medial longitudinal bundle,

602

vagus, 596

relation of, to fourth ventricle, 596
vestibular, 554, 604

early importance of, 575

relation of, to fourth ventricle, 604
Nuel, space of, 852
Number of bones, 265
Nutrient arteries, 87
Nymphæ, see Labia pudendi minora
Obelion, 171, 285
Obex, 579
Oblique chord, 328
line, anterior, of radius, 215

external, of mandible, 155
Oblique line of tibia, 249

vein of Marshall, 960
Obliquus externus abdominis muscle, 476
inferior, of neck, 444

of orbit, 453
internus abdominis muscle, 478
superior muscle of neck, 444

of orbit, 453

action of, 454

nerve-supply of, 454
Obliterated umbilical artery, 936
Obstetrical paralysis of Duchenne, 1395
Obturator artery, 940

abnormalities of, 1057
canal, 338
crest, 233
externus muscle, 413

action of, 414

nerve-supply of, 414
fascia, 489
foramen, 234
gland, 1017

Obturator nerve (contd.), accessory, 726

plexus, 723
tubercle, anterior, 234

posterior, 234
vein, 984
Occipital angle of parietal bone, 119

arteries, 895
bone, 120

architecture of, 270
basilar part of, 123

ossification of, 124
cerebral surface of, 121
condyles of, 122

ossification of, 124
connexions of, 124
foramen magnum of, 123, 172, 178
lateral parts of, 121
morphology of, 290
nuchal lines of, 121

plane of, 121
ossification of, 124
relation of, to sutures, 165, 171
squamous part of, 121

ossification of, 124
variations in, 277
condyles, 122, 182

third, 278
crest, external, 121

internal, 121, 182
fontanelle, 293
lobe, 660

topography of, 1360
lymph glands, 998
nerves, 688-690
plane, 118
point, 183, 285
protuberance, external, 121, 178

internal, 121, 182
sinus, 183, 974

abnormalities of, 1058
sulcus, 661
triangle, 1395

vein, 965, 967
Occipito-atloid joint, 309

movements at, 311
ligamente, 310
Occipito-epistropheal ligaments, 311
Occipito-frontal fasciculus, 650
Occipito-mastoid suture, 165, 171
Oculo-motor nerve, 683

connexions of, 604
development of, 683
morphology of, 798
nucleus of, 603

splanchnic efferent nucleus of, 604
sulcus, 603
Oculo-nasal sulci, 49
Odontoblasts, 1245

processes of, 1247
Esophageal arteries of aorta, 925

of coronary, 929
of inferior thyreoid, 611

morphology of, 1046
groove of liver, 1189

of lung, 1094
opening of diaphragm, 473
orifice of stomach, 1163
plexus, 791

veins, 961
Esophagus, 1150

abdominal part of, 1152
cervical portion of, 1151

groove, 234

abnormalities of, 281
internus muscle, 418

action of, 418

nerve-supply of, 418
membrane, 338
nerve, 722

Esophagus, cervical (contd.), surgical anatomy

Oocyte, 12

of first order, 12

of second order, 15
Oogonia, 12, 15
Oolemma, 13
Opening of subarachnoid part of

1362
Opercula insulæ, 655

orbital, 655
superior, 655

temporal, 655
Ophryon, 285
Ophthalmic artery, 902

abnormalities of, 1054
nerve, 772

morphology of, 797
veins, 968
Opisthion, 178, 183
Opponens digiti quinti muscle, 393

action of, 394

nerve-supply of, 394
Opponens pollicis muscle, 392

action of, 393

nerve-supply of, 393
Optic axis, 807
chiasma, 541, 619

decussation in, 769
development of, 609, 682, 826

morphology of, 798
commissure, 619
cup, 682, 826

of optic disc, 815
disc, 815
foramen, 180

abnormalities of, 278
groove, 135
nerve, 541, 768

deep connexions of, 620
development of, 33, 609, 682
morphology of, 798
papilla, 815

in retina, 816
radiation, 620, 643, 658
recess, 618
stalk, 682, 825, 826

morphology of, 798
tract, 541, 619

central connexions of, 619

cortical connexions of, 620
vesicle, 825

pigmentary layer of, 825
Ora serrata, 815

structure of, 815
Oral part of the pharynx, 1144, 1145
Orbicularis oculi muscle, 450
Orbicularis oris muscle, 450

action of, 452

nerve-supply of, 452
Orbiculus ciliaris, 812
Orbit, 160, 162

fascia of, 452
floor of, 162
lateral wall of, 162
medial wall of, 163
muscles of, 452

action of, 454
morphology of, 496

nerve-supply of, 454
roof of, 160

veins of, 968
Orbital artery of middle nieningeal, 898

brain,

of, 1393
constrictions of, 1151
development of, 45, 1249
diaphragmatic part of, 1152
distensibility of, 1407
glands of, 1155
relations of, 1151, 1152, 1153
structure of, 1153
surgical anatomy of, 1407
thoracic part of, 1152
variations in, 1153

vessels and nerves of, 1155
Olecranon, 210
fossa, 208

topography of, 1449
Olfactory area, 500, 622
bulb, 622, 623

development of, 622
morphology of, 622

structure of, 623
bundle, 627
cells, 805
cleft, 1378
ganglion, 622

morphology of, 622
glands, 804
glomeruli, 623
groove, 140, 141, 179
hairs, 805
lobe, 624

development of, 624
relation of, to anterior cerebral commissure,

626
nerve, 767, 768, 805

central connexions of, 623

development of, 682
neurones, 625

of superficial temporal, 897

organ, 799

for receptive impressions, 625.
pits, 49, 682
sulcus, 666
tract, 622, 623

development of, 622

structure of, 623
triangle, 623

tubercle, 623
Oligolecithal ovum, 14
Olivary nucleus, 555
Olive of medulla oblongata, 547
Omental bursa, 1162, 1238
tuberosity of liver, 1193

of pancreas, 1206
Omentum, 1162

gastro-colic, 1162
gastro-hepatic, 1162
gastro-splenic, 1162

development of, 1253

relation of, to omental bursa, 1239
greater, 1162, 1241

development of, 1253
functions of, 1242
relation of, to duodenum, 1186

to omental bursa, 1239

to transverse colon, 1239
lesser, 1162, 1197, 1241

development of, 1253

relation of, to omental bursa, 1239
Omo-hyoid muscle, 459

action of, 394

nerve-supply of, 394
Ontogeny, 1

Orbital (contd.), fossa, 160

gyri, 666
index, 287
margin, 115

sexual differences in, 193
part of frontal bone, 117, 162
plate of ethmoid bone, 140, 163
process of palate bone, 152, 162, 170

of zygomatic bone, 154
septum, 822
sulcus, 666

wings of sphenoid, 135
Orbito-maxillary-frontal suture, 279
Orbito-nasal centre, 150
Orbito-sphenoids, 135, 138
Orbito-tarsal ligaments, 1378
Organ of Corti, 849, 856

epibranchial, 796, 797
of lateral line, 796
of Ruffini, 865
of senses, 799
of taste, 854

vomero-nasal, of Jacobson, 802
Orifice, aortic, 878

topography of, 1405
external, of uterus, 1316
internal, of uterus, 1317
mitral, 876, 878

level of, 1442

topography of, 1405
pulmonary, 878

topography of, 1405
tricuspid, 877

level of, 1442

topography of, 1405
Origin of muscles, 364
Orthocephalic skulls, 286
Orthognathous skulls, 287
Os or Ossa, breve, 82

calcaneus, 259
capitate, 221

morphology of, 295

ossification of, 223
carpal, 280
carpi, 217
centrale, 280

morphology of, 295
clitoridis, 1326
coccygis, 99
cordis, 876
coxæ, 228
cranii, 115
cuboideum, 263
cuneiforme, first, 261

second, 262

third, 263
ethmoidale, 139
extremitatis inferioris, 228

superioris, 197
faciei, 146
fibulare, 295
frontale, 115
hamatum, 221

surface anatomy, 1151

variation in, 280
hyoideum, 158
ilium, 228
Incă, 278
intercuneiforme, 282
interfrontale, 277
intermetatarsale, 282
interparietale, 277

Os or Ossa (contd.), ischii, 232

Japonicum, 279
lacrimale, 143
longum, 82
lunatum, 218
metacarpalia, 223
metatarsalia, 265
multangulum majus, 220

minus, 220
nasale, 145
naviculare, of the hand, 218

of the foot, 261
occipitale, 120
odontoideum, 275
orbiculare, 840
palatinum, 150
parietale, 118
penis, 1300
pisiforme, 219
pubis, 233
radiale, 295
sacrum, 96
sesamoidea, 269
sphenoidalé, 133
subcapitulare, 280
sustentaculi, 282
suturarum, 145
tarsi, 254
temporale, 125
tibiale, 295
trigonum, 282
triquetrum, 219
ulnare, 295
Vesaleanum, 282

zygomaticum, 153
Osseous labyrinth, 843
Ossicles, auditory, 838

articulations of, 840
development of, 841
joints of, 840
ligaments of, 841

movements of, 842
epipteric, 146

of Kerkring, 124
Ossification of bones, 84

of laryngeal cartilages, 1065
Osteoblasts of bone, 85
Osteology, 3, 81

descriptive terms of, 82
Ostium abdominale tubæ uterince, 1314

maxillare, 804
pharyngeum tubæ auditivæ, 837, 838
tympanicum tubæ auditivæ, 837

uterinum tubæ, 1315
Otic ganglion, 781

branches of, 781
development of, 684, 796

roots of, 781
vesicle, 51, 853
Otoconia, 847
Ovarian artery, 928

fimbria, 1312, 1314
fossa, 1312
ligament, 1312
plexus, 765
vein, 1048

abnormalities of, 1058

morphology of, 1048
Ovary, 1311

bursa of, 1318
connexions of, 1312
corpora albicantia of, 1313

Nerve or Nerves (contd.)
lingual, 1131

surgical anatomy of, 1375
in tongue, 1131
of glossopharyngeal, 780

communications of, 780
morphology of, 796
of hypoglossal, 795

of vagus, 788
long scrotal, 739

thoracic, 702
to longus colli muscle, 468
lumbar, 719

anterior rami, 719

posterior rami, 690
lumbo-inguinal branch of genito-femoral,

Nerve or Nerves (contd.)
musculo-cutaneous, 704

722
to lumbrical muscles, of foot, 734, 735

of hand, 706, 709
of lung, 791
mandibular, 778
marginal, of mandible, 784
masseteric, 779
mastoid, 695
maxillary, 775
meatus acoustici externi, 780
medial cutaneous, of the arm, 710

of the calf, 732
of forearm, 709

of thigh, 724, 725
median, 706
branches in the forearm, 705

in hand, 706
communications, 705, 707
course of, 705
cutaneous branches, 706
muscular branches, 705
palmar ramus, 705
surgical anatomy of, at elbow, 1451

in arm, 1448
volar interosseous nerve of forearm, 705
of membrana tympani, 836
meningeal, of vagus, 788

(middle), 775
mental, 780
to muscles of abdominal wall, 485

of arm, 381
of back, 439
of buttock, 418
of face, 452
of foot, 425
of forearm, 400
of hand, 400
of hyoid bone, 460
of iris, 814
of leg, 435
of lower limb, 718
of mastication, 457
of orbit, 454
of pectoral region, 369
of pelvis, 494
of perineum, 489
of pinna, 830
prevertebral muscles, 470
of shoulder, 375, 376, 377
of soft palate, 786, 788
of thigh, 418
of thorax, 474
of tongue, 463
between trunk and upper limb,

372
of upper limb, 700

variations of, 752
to mylo-hyoid, 780
nasal of infra-orbital, 777

lateral, 773
medial, 773
posterior inferior lateral, 778

superior lateral, 778
naso-ciliary, 773
naso-palatine, 778
to obliqui abdominis muscles, 716
obturator, 722

accessory, 726
to obturator externus muscle, 723

internus muscle, 728
occipital, greater, 689

branch of posterior auricular, 783
occipital, small, 695

morphology of, 700
occipital third, 690
oculo-motor, 769

branches of, 770
communications of, 770
course of, 770
deep origin of, 603
development of, 796
morphology of, 796

superficial origin of, 769
cesophageal, from sympathetic, 760

from vagus, 789
olfactory, 767, 768, 805

development of, 622
morphology of, 797
origin of, 624, 628

termination of, 768
ophthalmic, 772
branches of, 772

frontal, 772
lacrimal, 772
supra-orbital, 772

supra-trochlear, 773
course of, 772

development of, 796
optic, 768

development of, 82
morphology of, 797
origin of, 658

retinal portion of, 815
orbital, of spheno-palatine ganglion, 778
palatine, 778

anterior, 778
middle, 778

posterior, 778
palpebral, 824
to parotid gland, 1137
patellar, 726
perforans coccygeus major, 738
perforating cutaneous, 737
pericardiac, 791
perineal, 737

of fourth sacral, 738
of posterior cutaneous nerve of thigh, 737

superficial, 739
to perineal muscles, 739
peripheral, development of, 679
peroneal anastomotic ramus, 730
peroneal, deep, 730

superficial, 731
to peroneus brevis, 731

longus, 731
petrosal, deep, 758, 777

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