OCMM midline Bones

Question 1

cranial base is composed of the unpaired bones:

Answer 1

sphenoid and occiput

Question 2

unpaired facial bones

Answer 2

ethmoid, mandible, vomer and frontal

Question 3

paired bones of the cranial vault

Answer 3

parietal, tmeporal, squamous temporal and frontal

Question 4

facial paired bones

Answer 4

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

Question 5

motion of midline bones

Answer 5

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

Question 6

motion of paired bones

Answer 6

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

Question 7

motion of the SBS in flexion

Answer 7

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

Question 8

four components of the ethmoid

Answer 8

cribiform plate
perpendicular plate
two lateral masses

Question 9

describe flexion of the ethmoid

Answer 9

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

Question 10

effects of external rotation of the maxillae on the ethmoid

Answer 10

lateral masses expand inferiorly

Question 11

describe extension of the ethmoid

Answer 11

crista galli moves inferior and anterior along its transverse axis

Question 12

effects of internal rotation on the ethmoid

Answer 12

lateral masses compress inferiorly

Question 13

what drives the vomer

Answer 13

sphenoid

Question 14

vomer in flexion

Answer 14

wide flat palate

depresses the hard palate, flattening the roof of the mouth

Question 15

vomer in extension

Answer 15

narrow tall palate

ascends to allow premaxillae to externally rotate

Question 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 _____

Answer 16

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

Question 17

in flexion, what happens to the palatine bones

Answer 17

follows the maxillae into external rotation and

PALATE FLATTENS

Question 18

in extension, what happens to the palatine bones

Answer 18

follows the maxillae into internal rotation and PALATE RISES

Question 19

number of axes in SBS vertical strain

Answer 19

2

horizontal and left-right

Question 20

how do you name a vertical strain?

Answer 20

by the directi onof the basisphenoid

Question 21

sphenoid is in flexion, vertical strain

Answer 21

superior vertical strain

bones rotate anteriorly

Question 22

sphenoid is in extension, vertical strain

Answer 22

inferior vertical strain

bones rotate posteriorly

Question 23

superior vertical strain

Answer 23

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

Question 24

inferior vertical strain

Answer 24

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

Question 25

sphenoid and occiput rotate in opposite directions around an AP axis

Answer 25

SBS: torsion

Question 26

how to name an SBS torsion

Answer 26

superior sphenoid on the greater wing side

Question 27

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

Answer 27

superior vertical strain

Question 28

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

Answer 28

inferior vertical strain

Question 29

how many axes are in an SBS torsion

Answer 29

one saggital axis - AP axis

Question 30

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

Answer 30

right SBS torsion

Question 31

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

Answer 31

left SBS torsion

Question 32

evidence of rotation along an AP axis would be palpated as

Answer 32

a high greater wing

Question 33

right hand moves superior. left hand moves inferior

Answer 33

RIGHT SBS TORSION

Question 34

left hand moves superior | right hand moves inferior

Answer 34

LEFT SBS TORSION

Question 35

how many axes in an SBS lateral strain?

Answer 35

two VERTICAL axes - superior and inferior

Question 36

how do you name an SBS lateral strain

Answer 36

by the direction of the translation of the basisphenoid

Question 37

parallelogram head describes

Answer 37

an sbs lateral strain

Question 38

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

Answer 38

SBS right lateral strain

Question 39

index finger pads move right and pinky pads move left

Answer 39

SBS left lateral strain

Question 40

how many axes in SBS sidebending rotation

Answer 40

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

Question 41

how do you name a sidebending rotation dysfunction

Answer 41

designated by the convex or flexed side

Question 42

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

Answer 42

SBS sidebending rotation

Question 43

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

Answer 43

sidebending rotation palpatory findings

Question 44

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

Answer 44

right SBS sidebending rotation

Question 45

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

Answer 45

left SBS sidebending rotation

Question 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

Answer 46

sphenobasilar compression

Question 47

how to test for compression

Answer 47

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

Question 48

in SBS extension, which way does the sacrum move

Answer 48

nutation base moves anteriorly apex moves posteriorly

Question 49

in SBS flexion, which way does the sacrum move

Answer 49

counternutation base moves posteriorly apex moves anteriorly