Cranial Strains and Movement Pattern Flashcards
Midline bones usually move around a _1_ axis in a _2_ direciton.
- transverse
- AP
midline bones = occiput, sphenoid, facial bones
Paired bones usually move about a _1_ axis in a _2_ motion
- AP
- lateral
paired bones = frontal, parietal, squamous temporal/occiput, grt sphenoid wing, inf nasal concha, lacrimal, maxilla, nasal, palatine, zygoma, frontal
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 __, and the vomer moves same direction as the __.
When the SBS is in flexion, the ethmoid will move in the same direction of the occiput, and the vomer moves same direction as the sphenoid.
**sphenoid rotates forward (clockwise), ethmoid rotates back (c-clockwise)
crista galli is move up and back
Where are your fingers and palms for vault contact?
Index = grt sphenoid wing
Middle = ant to ear
Ring = mastoid process
Pinky = occiput
Palms/thumb = rest lightly on head
How is lateral strain named?
name for which wing is higher = highest corner of the parallelogram
two axes are sup/inf (vertical)
motion in same direction 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 transverse axes
**1st fingers move away, pinky toward
Inf - bones rotate post around transverse axes
**1st fingers move toward, pinky away
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
ONLY 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 = name as the higher 1st finger
How do we name SB rotation?
convexity developed in the cranium
one sagittal axis (an-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
What does SBS flexion look like?
Flexion/inhalation
- wings move anterior
- SBS moves superior
- bowl of occiput moves post/inf
What does SBS extension look like?
How do the ER effects of SBS flexion affect the ethmoid?
Lateral masses expand out and inferior
What happens to the ethmoid during SBS extension?
What are the IR effects of this motion?
They rotate opposite of eachother again on transverse axis
**sphenoid rot back (c-clock) ethmoid rot formard (clock)
crista galli moves down and out
IR effects = lateral masses move medial and inf
What effect does SBS flexion/ext have one the palate?
Flexion = wide flat palate
Ext = narrow & tall palate
Where is the axis of motion in the sacrum?
Superior transverse axis (S2)
Where are fingers for fronto-occipital contact?
One hand cup occiput
Long finger and thumb on grt wings
Describe Becker contact?
thumbs on grt wings (ant temple)
index on mastoid process
pinky fingers on occiput, post to OM suture
Which bones make up the asterion?
Occiput, parietal, temporal bones
Which bones make up the pterion?
Parietal, temporal, sphenoid, frontal bones
