Cranial motion and Cranial strains Flashcards

1
Q

5 tenets of primary respiratory mechanism

A

inherent rhythmic motion of brain and spinal cord
fluctuation of CSF
mobility of intracranial and intraspinal membranes
articular mobility of cranial bones
involuntary mobility of sacrum between ilia

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2
Q

the dura is continuous with what

A

periosteum of skull

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3
Q

what influence the phsyiologic cranial movements

A

dural membrane
coiling and uncoiling of CNS
fluctuation CSF

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4
Q

what occurs in inhalation to cranium

A

flexion and external rotation

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5
Q

what occurs in exhalation to cranium

A

extension and internal rotation

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6
Q

where is the respiratory axis of the sarcum

A

2nd sacral segment, transverse axis

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7
Q

what is nutation

A

sacral felxion from spinal and dura core link

the base anteriorly and apex posteriorly

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8
Q

what is counternutation

A

sacral extension. base moves posterosuperioly and apex moves anteriorly towards pubes

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9
Q

flexion phase of cranium causes what in sacrum

A

counternutation

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10
Q

what are the midline bones of cranium

A

sphenoid, occiput, ethmoid, vomer and sacrum

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11
Q

what are the paired bones of the cranium

A

temporals, parietals, frontals, ethmoid, nasals, lacrimals, maxillae, palatines, zygomae, inferior conchae and mandible

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12
Q

which bones are moving in the fleixon and extension

A

midline bones

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13
Q

what bones move in the external and internal rotation

A

paired bones

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14
Q

what is normal cranial rhythmic impulse

A

10-14 fluctuations a minute

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15
Q

what are the 2 phases of cranial impulse

A

flexion- external rotation of paired bones with increase width of head
extension- internal rotation of paired bones with increased length of the head

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16
Q

where does flexion of cranial motion move around

A

rotational around 2 transverse axes
at level of foramen magnum
body of sphenoid

17
Q

SBS motion in flexion

A

basiocciput and basispehnoid move cephalad and occipital squama and wings of sphenoid move caudally

18
Q

SBS motion in extension

A

basiocciput and basisphenoid move caudad while occipital squama and wings of sphenoid move cephalad

19
Q

axis in extension cranial motion

A

rotational around 2 transverse axes
at level of foramen magnum
body of sphenoid

20
Q

what type of cranial strains are there

A

torsion, sidebending rotation, vertical strain, lateral strain, SBS compression

21
Q

what is cranial torsion

A

sphenoid and occiput rotate in opposite directions around AP axis

22
Q

how do you name R or L cranial torsion

A

superior greater wing of sphenoid

23
Q

L index finger moves superior and 5th digit moves inferior

R index finger moves inferior and 5th digit superior

24
Q

describe cranial sidebending rotation

A

sphenoid and occiput rotate opp directions around parallel vertical axes to side bend
bones rotates around AP axis in same direction so on side of SBS convexity
cranium moves inferior

25
how do you name L or R sidebending rotation of cranium
side of SBS convexity and the side that moves inferiorly
26
describe what you feel on sidebending rotation of cranial motion
fingers of one hand spread apart and move inferiorly while on other hand they come together and move superiorly so R would be R apart and inferior L together and superior
27
Motion of vertical strain
sphenoid and occiput rotate same direction parallel transverse axes shearing force of SBS one bone in flexion other in extension
28
how are vertical strains named
superior and inferior | direction of the base of spenoid
29
describe what you feel in superior vertical strain
index fingers move inferior because sphenoid base moving superiorly 5th digits of hands move superiorly because the occiput is moving inferior
30
what is a lateral strain
sphenoid and occiput rotate in same direction around parallel vertical axes, shearing force at SBS
31
lateral strains are named how
direction the basisphenoid moves
32
describe vault hold for L lateral strain
index fingers shift to right (sphenoid base moves L) | 5th digits shift to L (occipital base turns right)
33
What is SBS compression
approximation of sphenoid and occipital bases as they compress along AP axis
34
What do you feel in SBS compression
both hands approximate | assoc with decreased Primary Resp rate
35
What can cause a superior vertical strain
- caudal force centrally over anterior superior frontal bone | - force to superior occiput directed from superior/posterior to anterior
36
what can cause a inferior vertical strain
- caudal force to basisphenoid (like from bregma) - cephalad force to condylar parts (falling on base of spine) - caudal force transmitted b/l posterior superior parietal bones or along posterior sagittal surture
37
what can cause SBS compression
force directed along AP axis leading to longitudinal compression of SBS
38
what can cause lateral strains
- lateral- medial force over greater wing of sphenoid pushing them L or R - lateral-medial force over occiput pushing the posterior occiput L or R
39
what can cause external rotations of temporal bones
- force L mandible in L-R direction causes R externally rotated temporal bone and L internal rotated temporal bone - traction of one side mandible from dental work can cause internal rotation of ipsilateral side as the traction and external rotation on contra side