1.7.15 - Cranial Physiologic Motion Flashcards
tenets of primary respiratory mechanism
1 - inherent rhythmic motion of brain and spinal cord
2 - fluctuation of CSF
3 - mobility of intracranial and intraspinal membranes (RTM)
4 - articular mobility of cranial bones
5 - involuntary mobility of sacrum between ilia
RTM
reciprocal tension membrane
falx cerebri
tentorium cerebelli
formed by dural reflections
dura contiguous with periosteum of skull
physiologic motion
influenced by:
- RTM
- coiling/uncoiling of CNS
- fluctuation of CSF
correlation:
- flexion/ext rotation/inhalation
- extension/int rotation/exhalation
respiratory axis of sacrum
transverse axis
-2nd sacral segment
posterior to canal
counternutation
flexion
sacrum influenced by spinal dura link
nutation
extension
base moves anteriorly and apex moves posteriorly
nutation/extension of sacrum
base moves posterosuperior and apex moves posteriorly
counternutation/flexion of sacrum
flexion at SBS
upward through SBS
extension at SBS
downard through SBS
midline bones
sphenoid occiput ethmoid - median plate vomer sacrum
flexion and extension
paired bones
temporal parietal frontal ethmoid - lateral mass nasal lacrimal maxilla palatines zygoma inferior conchae mandible
external and internal rotation
normal cranial rhythmic pulse
10-14/minute
flexion
external rotation of paired bones and increased width of head
-transverse diameter
extension
internal rotation of paired bones and increased length of head
-AP diameter
order of landmarks for SBS
greater wing of sphenoid
basisphenoid
basiocciput
occipital squama
vault hold
palpate frontal, sphenoid, temporal, occipital, membranes and fluid between them
flexion
motion around 2 transverse axes
- level of foramen magnum
- body of sphenoid
basiocciput and basisphenoid - move cephalad
greater wing and occipital squama move caudal
extension
motion around 2 transverse axes
basiocciput and basisphenoid - move caudal
greater wing and occipital squama - move cephalad
