Cranial Strain Patterns Flashcards
Sidebending Rotation is named by the side of the . . .
Convexity
*EOC Manual 2017 pg 100
For sidebending rotations, the physician will feel fullness on the side of convexity or concavity?
Convexity
What is the rotational motion of a side bending strain pattern
Both sphenoid and occiput rotate INFERIORLY together on an A-P axis on the side of convexity of side bending
During this strain pattern the sphenoid and occiput rotate in the same direction around parallel vertical axes
Lateral strain
carrying the base of the sphenoid to the left or right of the base of the occiput
During this strain pattern the sphenoid and occiput rotate in opposite directions around parallel vertical axes
Sidebending rotation
This strain pattern is created from a blow along the AP axis, preventing true flexion and extension.
SBS compression
May also present as an alternating vertical strain type
SBS compression
BLT guy
Sutherland
Evidence for PRM
Frymann
Blow along AP axis causes
SBS Compression
Caused by a blow from above or below on an ANTERIOR quadrant
-Example: frontal or cheek
Torsion
Caused by a blow from above or below on a POSTERIOR quadrant
-Example: occiput or parietal
Torsion
Caused by a blow to temporal and parietal region exactly at the level of the SBS causing convexity to the opposite side
Side bending Rotation
Caused by a blow laterally to occiput or sphenoid
Lateral strain
Caused by a blow to anterior or posterior midline
Vertical strain
Describe the Cranial Torsion axis
1 AP axis
Describe the Sidebending rotation axis
3 Axis:
- 2 vertical (one thru foramen magnum and one thru body of sphenoid)
- 1 AP (from nasion to opisthion
Describe the Superior Vertical Strain axis
Sphenoid and occiput rotate in the same direction around parallel transverse axes
Describe the Inferior Vertical Strain axis
Sphenoid and occiput rotate in the same direction around parallel transverse axes
Straight from the manual:
Caused by blow to the lateral side of temporal and parietal region exactly at the level of the SBS inducing side bending at the SBS with convexity to the opposite side
Sidebending rotation
Straight from the manual:
Caused by a blow on the vertex BEHIND the plane of the SBS but anterior to the occipital axis OR from below through the mouth, anterior to the plane of the SBS, but posterior to the sphenoid axis
Superior vertical strain
Straight from the manual:
A blow on the vertex ANTERIOR to the plane of the SBS but posterior to the sphenoid axis OR from below through the heels or mandible, posterior to the plane of the SBS but anterior tot he occipital axis
Inferior vertical strain
Straight from the manual:
Caused by a DIRECT lateral blow to the side of the head anterior or posterior to the plane of the SBS
Lateral strain
