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OS3 Test 1 > OCMM midline Bones > Flashcards

OCMM midline Bones Flashcards

1
Q

cranial base is composed of the unpaired bones:

A

sphenoid and occiput

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2
Q

unpaired facial bones

A

ethmoid, mandible, vomer and frontal

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3
Q

paired bones of the cranial vault

A

parietal, tmeporal, squamous temporal and frontal

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4
Q

facial paired bones

A

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

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5
Q

motion of midline bones

A

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

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6
Q

motion of paired bones

A

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

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7
Q

motion of the SBS in flexion

A

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

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8
Q

four components of the ethmoid

A

cribiform plate
perpendicular plate
two lateral masses

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9
Q

describe flexion of the ethmoid

A

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

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10
Q

effects of external rotation of the maxillae on the ethmoid

A

lateral masses expand inferiorly

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11
Q

describe extension of the ethmoid

A

crista galli moves inferior and anterior along its transverse axis

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12
Q

effects of internal rotation on the ethmoid

A

lateral masses compress inferiorly

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13
Q

what drives the vomer

A

sphenoid

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14
Q

vomer in flexion

A

wide flat palate

depresses the hard palate, flattening the roof of the mouth

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15
Q

vomer in extension

A

narrow tall palate

ascends to allow premaxillae to externally rotate

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16
Q

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 _____

A

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

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17
Q

in flexion, what happens to the palatine bones

A

follows the maxillae into external rotation and

PALATE FLATTENS

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18
Q

in extension, what happens to the palatine bones

A

follows the maxillae into internal rotation and PALATE RISES

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19
Q

number of axes in SBS vertical strain

A

2

horizontal and left-right

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20
Q

how do you name a vertical strain?

A

by the directi onof the basisphenoid

21
Q

sphenoid is in flexion, vertical strain

A

superior vertical strain

bones rotate anteriorly

22
Q

sphenoid is in extension, vertical strain

A

inferior vertical strain

bones rotate posteriorly

23
Q

superior vertical strain

A

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
Q

inferior vertical strain

A

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

25
Q

sphenoid and occiput rotate in opposite directions around an AP axis

A

SBS: torsion

26
Q

how to name an SBS torsion

A

superior sphenoid on the greater wing side

27
Q

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

A

superior vertical strain

28
Q

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

A

inferior vertical strain

29
Q

how many axes are in an SBS torsion

A

one saggital axis - AP axis

30
Q

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

A

right SBS torsion

31
Q

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

A

left SBS torsion

32
Q

evidence of rotation along an AP axis would be palpated as

A

a high greater wing

33
Q

right hand moves superior. left hand moves inferior

A

RIGHT SBS TORSION

34
Q

left hand moves superior

right hand moves inferior

A

LEFT SBS TORSION

35
Q

how many axes in an SBS lateral strain?

A

two VERTICAL axes - superior and inferior

36
Q

how do you name an SBS lateral strain

A

by the direction of the translation of the basisphenoid

37
Q

parallelogram head describes

A

an sbs lateral strain

38
Q

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

A

SBS right lateral strain

39
Q

index finger pads move right and pinky pads move left

A

SBS left lateral strain

40
Q

how many axes in SBS sidebending rotation

A

one sagittal axis (AP)

two vertical axes (superior-inferior)

41
Q

how do you name a sidebending rotation dysfunction

A

designated by the convex or flexed side

42
Q

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

A

SBS sidebending rotation

43
Q

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

A

sidebending rotation palpatory findings

44
Q

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

A

right SBS sidebending rotation

45
Q

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

A

left SBS sidebending rotation

46
Q

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

A

sphenobasilar compression

47
Q

how to test for compression

A

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

48
Q

in SBS extension, which way does the sacrum move

A

nutation
base moves anteriorly
apex moves posteriorly

49
Q

in SBS flexion, which way does the sacrum move

A

counternutation
base moves posteriorly
apex moves anteriorly

OS3 Test 1 (8 decks)

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