Cranial motion and Cranial strains Flashcards
5 tenets of primary respiratory mechanism
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
the dura is continuous with what
periosteum of skull
what influence the phsyiologic cranial movements
dural membrane
coiling and uncoiling of CNS
fluctuation CSF
what occurs in inhalation to cranium
flexion and external rotation
what occurs in exhalation to cranium
extension and internal rotation
where is the respiratory axis of the sarcum
2nd sacral segment, transverse axis
what is nutation
sacral felxion from spinal and dura core link
the base anteriorly and apex posteriorly
what is counternutation
sacral extension. base moves posterosuperioly and apex moves anteriorly towards pubes
flexion phase of cranium causes what in sacrum
counternutation
what are the midline bones of cranium
sphenoid, occiput, ethmoid, vomer and sacrum
what are the paired bones of the cranium
temporals, parietals, frontals, ethmoid, nasals, lacrimals, maxillae, palatines, zygomae, inferior conchae and mandible
which bones are moving in the fleixon and extension
midline bones
what bones move in the external and internal rotation
paired bones
what is normal cranial rhythmic impulse
10-14 fluctuations a minute
what are the 2 phases of cranial impulse
flexion- external rotation of paired bones with increase width of head
extension- internal rotation of paired bones with increased length of the head
where does flexion of cranial motion move around
rotational around 2 transverse axes
at level of foramen magnum
body of sphenoid
SBS motion in flexion
basiocciput and basispehnoid move cephalad and occipital squama and wings of sphenoid move caudally
SBS motion in extension
basiocciput and basisphenoid move caudad while occipital squama and wings of sphenoid move cephalad
axis in extension cranial motion
rotational around 2 transverse axes
at level of foramen magnum
body of sphenoid
what type of cranial strains are there
torsion, sidebending rotation, vertical strain, lateral strain, SBS compression
what is cranial torsion
sphenoid and occiput rotate in opposite directions around AP axis
how do you name R or L cranial torsion
superior greater wing of sphenoid
L index finger moves superior and 5th digit moves inferior
R index finger moves inferior and 5th digit superior
L torsion
describe cranial sidebending rotation
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