Midline Bones And Competency 2 Flashcards
How do the palatines move in SBS flexion?
External rotation
When the SBS is in flexion, what does the ethmoid follow?
What follows the sphenoid’s motion?
Occiput
Vomer
Does rotation occur towards or away from the side of convexity in rotation/Side-bending SD?
Towards
Torsion axis?
Plane of motion?
A/P
coronal
Why does the spinal membranes cause sacral motion with the CRI?
The dura
What causes lateral strain pattern?
How?
Trauma
Lateral force to one side of anterior cranium or opposite side of posterior cranium
How do the dr’s hands move during right torsion strain pattern?
Hands twist in opposite directions, Right thumb points back at Dr.
Left thumb points away
Suck your thumb for which side is the torsion
In what strain pattern do the Occiput and sphenoid rotate in the same direction?
Vertical strain
Right torsion strain pattern means what?
As SBS flexion occurs, the right greater sphenoid wing moves cephalad while the right Occiput moves caudad
Superior vertical strain, how do the Occiput and sphenoid move?
Thumbs do what?
Rotate anteriorly around their transverse axis
Thumbs move away from physician
What changes in other bones are occurring in torsion patterns?
Toilet Paper MOFTS
Temporal and parietal bones - external rot. On side of torsion
Mandible - shifted towards side of torsion
Orbit - smaller on side of torsion
Falx cerebri - ant. End rotates w/sphenoid, post. W/Occiput
Tentorium cerebelli - Sidebend same direction as Occiput rotates
Spinal dura - inferior on side of low Occiput
Vertical strain axis?
Plane of motion?
Transverse
Sagittal
VTS
What is the motion of the apex of the sacrum in SBS flexion?
Anterior
Torsion is named for what?
Position of the greater wing of the sphenoid during cranial flexion
If a baby is delivered with forceps, what shape will it take?
Due to what pattern?
Parallelogram
Lateral strain
Lateral masses act as paired bones into _____ during cranial flexion?
Extension?
external rotation
Internal rotations
Lateral strain pattern axis?
Plane of motion?
Vertical axis
Transverse plane
LVT
What causes SBS compression?
Trauma or pressure to head or face, back of head, or entire periphery
Motion of sacral base during SBS flexion?
Extension?
Posterior
Anterior
How do the dr.’s hands move in a left SB/rotation SD?
Left hand moves down and out and fingers spread out, right hand moves up and crunches in
In a Right side-bending rotation strain pattern, during SBS flexion said, how does the sphenoid and Occiput move?
Sphenoid rotates left, Occiput right around sup/inf axis defined as right SB
Occiput and sphenoid rotate right around A/P axis, defined as right rotation
In a left lateral strain, how do the Occiput and sphenoid rotate?
Rotate to the right/anterior
What motions occur with SBS side-bending/rotation pattern for side-bending (axis and plane)?
SB as rotation of the Occiput and sphenoid around 2 vertical axes, motion occurs in transverse plane
What will the CRI be like in a compression?
Slow, low amplitude, difficult to feel, weak
How are lateral strains named?
Position of basi-sphenoid relative to the basi-Occiput
What axis does counternutation/nutation of the sacrum occur?
Superior sacral transverse axis
What breathing motion is paired with flexion?
Extension
Inhalation
Exhalation
Ethmoid axis?
Plane of motion?
Transverse
Sagittal
In a right torsion SD, describe the motion of the greater wing of sphenoid and Occiput
Wing moves cephalad
Occiput caudad
What are the midline / unpaired bones?
MOVES
Mandible Occiput Vomer Ethmoid Sphenoid
I guess frontal
What motions occur with SBS side-bending/rotation pattern for rotation (axis and plane)?
same AP axis as torsion, sphenoid and Occiput rotate in the same direction
The ethmoid is influenced by what?
Sphenoid and falx cerebri
What axis do midline bones rotate around?
Plane?
Transverse
Sagittal
How does the SBS compression pattern strain manifest?
Restriction to all motion at SBS
What relative changes are taking places in other bones in a SB/rotation SD?
Toilet Paper MOFFTS
Temporal and parietal bones - external rot. On convex side
Mandible - shifted to convex side
Orbit and frontal bone - anterior on convex side
Falx cerebri - SB following convexity of SB of SBS
Tentorium cerebelli - follows occipital motion (FOM)
Spinal dura - inferior on side of convexity, dropping sacral base inferiorly on that side
