OCMM midline Bones Flashcards Preview

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Flashcards in OCMM midline Bones Deck (49)
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1

cranial base is composed of the unpaired bones:

sphenoid and occiput

2

unpaired facial bones

ethmoid, mandible, vomer and frontal

3

paired bones of the cranial vault

parietal, tmeporal, squamous temporal and frontal

4

facial paired bones

inferior nasal concha, lacrimal, maxilla, nasal, palatine, zygoma

5

motion of midline bones

usually rotate about a trasverse axis in an anterior/posterior direct
even when it is labeled a flexion/extension

6

motion of paired bones

usually move about an AP axis in a alteral motion (coronal plane)
external rotation or internal rotation

7

motion of the SBS in flexion

sphenodi rotates about a transverse axis so that the wings move anteriorly
SBS movfes superior
occiput rotates along a transverse axis and moves posterior and inferior

8

four components of the ethmoid

cribiform plate
perpendicular plate
two lateral masses

9

describe flexion of the ethmoid

perpendicular plate is roatated by the sphenoid about its transverse axis
swings he crista galli SUPERIORLY AND POSTERIORLY

10

effects of external rotation of the maxillae on the ethmoid

lateral masses expand inferiorly

11

describe extension of the ethmoid

crista galli moves inferior and anterior along its transverse axis

12

effects of internal rotation on the ethmoid

lateral masses compress inferiorly

13

what drives the vomer

sphenoid

14

vomer in flexion

wide flat palate
depresses the hard palate, flattening the roof of the mouth

15

vomer in extension

narrow tall palate
ascends to allow premaxillae to externally rotate

16

when the SBS is in flexion, the
ethmoide will mvoe in the same direction as the _____
vomer will move in the same direction as the _____

ethmoid and occiput
vomer and sphenoid
vowels move together, consonants move together

17

in flexion, what happens to the palatine bones

follows the maxillae into external rotation and
PALATE FLATTENS

18

in extension, what happens to the palatine bones

follows the maxillae into internal rotation and PALATE RISES

19

number of axes in SBS vertical strain

2
horizontal and left-right

20

how do you name a vertical strain?

by the directi onof the basisphenoid

21

sphenoid is in flexion, vertical strain

superior vertical strain
bones rotate anteriorly

22

sphenoid is in extension, vertical strain

inferior vertical strain
bones rotate posteriorly

23

superior vertical strain

sphenoid is flexed with rotation around its transverse axis and basisphenoid superior; bilateral anterior quadrants are in external rotation
occiput is EXTENDED with rotation around its transverse axis; bilateral posterior quadrants are in internal rotation

24

inferior vertical strain

sphenoid extended, basisphenoid inferior, bilateral atnerior quandrants in IR
occiput flexed, bilateral posterior quadrants are in ER

25

sphenoid and occiput rotate in opposite directions around an AP axis

SBS: torsion

26

how to name an SBS torsion

superior sphenoid on the greater wing side

27

1st fingers move away from the practitioner, pinky fingers move toward the practitioner

superior vertical strain

28

1st fingers move toward the practitioner, pinky fingers move away from

inferior vertical strain

29

how many axes are in an SBS torsion

one saggital axis - AP axis

30

right greater wing of the sphenoid is superior compared to the left

right SBS torsion

31

left greater wing of the sphenod is superior when compared to the right

left SBS torsion

32

evidence of rotation along an AP axis would be palpated as

a high greater wing

33

right hand moves superior. left hand moves inferior

RIGHT SBS TORSION

34

left hand moves superior
right hand moves inferior

LEFT SBS TORSION

35

how many axes in an SBS lateral strain?

two VERTICAL axes - superior and inferior

36

how do you name an SBS lateral strain

by the direction of the translation of the basisphenoid

37

parallelogram head describes

an sbs lateral strain

38

index finger pads move left and pinky pads move to the right

SBS right lateral strain

39

index finger pads move right and pinky pads move left

SBS left lateral strain

40

how many axes in SBS sidebending rotation

one sagittal axis (AP)
two vertical axes (superior-inferior)

41

how do you name a sidebending rotation dysfunction

designated by the convex or flexed side

42

side of the lower greater wing and occiput is in relative flexion and high side is in relative extension

SBS sidebending rotation

43

one side feels fuller - 1st finger and pinky move away from each other and opposite side shrinks

sidebending rotation palpatory findings

44

right side fullness, right index and pinky move away, left fingers approximate

right SBS sidebending rotation

45

left side fullness, left index and pinky move away, right fingers approximate

left SBS sidebending rotation

46

a somatic dysfunction of the cranium in which the basisphenoid and the basilar portion of the occiput have been approximated that motion is moderately impaired, seriously lacking or almost completely lost
induced by trauma or compressive forces

sphenobasilar compression

47

how to test for compression

lift the lateral angles of the frontal bone anteriorly with thumbs while stabilizing the lateral angles of the occiput posteriorly with the hands

48

in SBS extension, which way does the sacrum move

nutation
base moves anteriorly
apex moves posteriorly

49

in SBS flexion, which way does the sacrum move

counternutation
base moves posteriorly
apex moves anteriorly