Cranial Strains and Movement Pattern Flashcards
Midline bones usually move around a _1_ axis in a _2_ direciton.
- transverse
- AP
Paired bones usually move about a _1_ axis in a _2_ motion
- AP
- lateral
The sphenoid and occiput rotates around a __ axis.
transverse
When the SBS is in flexion, the ethmoid will move in the same direction of the _1_, and the vomer moves same direction as the _2_.
- occiput
- sphenoid
Where do your fingers and palms rest on the pts head for vault contact?
How is a SBS lateral strain named?
for the direction of the base of the sphenoid
two axes are sup/inf (vertical)
motion in same direction for both bones about these axes
How is vertical strain named?
direction of the base of sphenoid
two axes are transverse (horizontal; left-right)
motion in same direction about these axes
Superior vertical strain vs. Inferior vertical strain
Sup - bones rotate ant around involved axes
Inf - bones rotate post around involved axes
How do your fingers move with superior strain (vertical strain)? inferior?
sup - 1st fingers move away from practitioner, pinky fingers move toward practitioner
inf - 1st fingers move toward from the practitioner, pinky fingers move away from practitioner
How do we name a torsion?
higher greater wing of the sphenoid
one sagittal axis (ant-post)
motion happens opp directions about this axis
1st Finger and pinky of one hand move superiorly while the other hand moves inferiorly.
How do we name SB rotation?
convexity developed in the cranium
one sagittal axis (ant-post) and two axes are vertical (sup-inf)
motion happens in the same direction about the sagittal axis in opp direction on the vertical axes
How do we palpate a SB rotation?
Named side feels “fuller” - 1st Finger and pinky move away from each other
Opposite side “shrinks” - 1st finger and pinky move toward each other
How does SBS flexion affect sacral base motion?
SBS flexion –> sacral base move posteriorly
“counternutation”
due to it pulling up on the dural sleeve of the cord
SBS extension –> sacral nutation
Flexion of the ethmoid causes the ____ to be rotated by the sphenoid about its transverse axis
perpendicular plate
*crista galli superiorly + posteriorly
What occurs to the perpendicular plate during extension of the ethmoid?
rotated by the sphenoid about its transverse axis
*crista galli inferiorly + anteriorly
What happens to the vomer, maxillae, and palatines with SBS flexion?
What bones does the vomer articulate with?
How do your fingers move with lateral strain?
1st finger moves in opposite direction from pinky finger
side of strain moves anteriorly
What is the axis of motion of the sacrum?
Superior Transverse Axis
