(1) Axial Skeleton Flashcards Preview

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Flashcards in (1) Axial Skeleton Deck (61):
0

supraorbital foramen

frontal bone

1

sagittal suture

midline articulation point of the two parietal bones

2

coronal suture

point of articulation of parietals with frontal bone

3

squamous suture

point of articulation of the temporal bone with the parietal bone

4

zygomatic process

a bridgelike projection of the temporal bone joining the cheekbone anteriorly

5

mandibular fossa

rounded depression on the inferior surface of the zygomatic process of the temporal bone where the mandible articulates with the cranium

6

external auditory meatus

canal in temporal bone leading to eardrum and middle ear

7

styloid process

needle-like projection of the temporal bone inferior to the external auditory meatus

8

jugular foramen

opening is medial to the styloid process and formed by the articulation of the temporal bone with the occipital bone

9

internal auditory meatus

opens on posterior of temporal bone

10

mastoid process

most inferior point of temporal bone

11

lambdoid suture

the point of articulation of the occipital bone with the parietal bones

12

foramen magnum

large opening in base of occipital bone

13

occipital condyle

(2) rounded projections lateral to the foramen magnum

14

external occipital protuberance

midline prominences medially posterior to the foramen magnum

15

sphenoid bone

bat shaped; articulates with all facial bones

16

greater wing

(sphenoid) rounder wings; seen exteriorly anterior to the temporal bone, forming part of the eye orbits

17

lesser wings

pointy, bat-shaped interior portion of the sphenoid bone

18

pterygoid process

inferior trough shaped projection of the sphenoid

19

sella turcicia

'saddle' of the inferior surface of the sphenoid

20

optic foramen

opening in the bases of the lower wings of the sphenoid

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foramen ovale

located inferioraly to the sella turcica of the sphenoid

22

ethmoid bone

irregular; found anterior to the sphenoid

23

crista galli

vertical projection of the ethmoid

24

cribiform plate

superior, bony plates of ethmoid

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perpendicular plate

vertical and directly inferior to the crista galli of the ethmoid

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middle nasal conchae

curves of the ethmoid 'parallel' to the perpendicular plate

27

condylar process

point of articulation between mandible and skull

28

coronoid process

mandible jutting anterior to condylar process

29

mental formamen

two on the sides of the chin area of the mandible

30

mandibular foramen

opening on inner surface of mandible

31

alveolar processes

superior/inferior surfaces of mandible/maxilla containing the teeth sockets

32

palatine process

ridges on surface of hard palate of maxilla

33

infraorbital foramen

inferior to the orbits and medial to the zygomatic processes

34

incisive foramen

posterior to center incisor tooth of the maxilla

35

palatine bone

paired bones posterior to the palatine processes, forming the posterior portion of the hard palate

36

zygomatic bone

cheek bone forming half of the zygomatic arch and the lateral inferior surface of the orbit

37

lacrimal bone

short, thick bones within the orbits, between the ethmoid and maxilla; pierced with lacrimal fossa

38

nasal bone

pair of bones forming the bridge of nose (longer and thinner than lacrimal bones)

39

vomer

blade shaped bone in median plane of nasal cavity; articulates with the sphenoid in between the pterygoid processes.

40

inferior nasal conchae

thin and curved bones protruding from the inferior lateral walls of the nasal cavity

41

hyoid

in throat, above the larynx; the only un-articulated bone in the body

42

vertebral body

rounded central portion facing anterior

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vertebral foramen

enclosed by vertebral body and vertebral arch

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transverse processes

two lateral projections from the vertebral arch

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spinous process

single medial and posterior projection from the vertebral arch

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superior & inferior articular processes

two pairs of processes lateral to the vertebral foramen on both the inferior and superior side, where the vertebrae articulates with adjacent vertebrae.

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atlas

c1; topmost and most triangular, lacking a spinous process and body; lets you nod your head

48

axis

c2; only vertebrae with a dens, a large vertical process upon which the atlas pivots

49

cervical vertebrae

vertebrae of the neck; smaller, more oval shaped bodies, with smaller & more anterior transverse foramen; the only vertebrae with small transverse foramen medial to the transverse processes

50

thoracic vertabrae

round foramen, transverse processes more angular, body is more triangular

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costal facet

areas of articulation of thoracic vertebrae with ribs

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lumbar vertebrae

largest vertebrae, oval body, triangular vertebral foramen, transverse processes perpendicular to spinous process

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median sacral crest

the spinous processes of the fused vertebrae of the sacrum

54

sacral ala

the winglike structures of the sacrum, formed by fused transverse processes

55

sacral canal

the cavity containing the continuation of the vertebral canal into the sacrum

56

manubrium

hand-shaped top region of the sternum

57

jugular notch

superior, medial notch of the manubrium of the sternum

58

clavicular notches

two contralateral notches on the manubrium of the sternum

59

xiphoid process

pointed inferior tip of the sternum

60

coccyx

tailbone