Cranial Stuff Flashcards
What are the motions during cranial flexion?
The midline bones flex while the paired bones externally rotate. The AP diameter decreases (Bert head). Associated with inhalation.
What are the motions during cranial extension?
The midlines bones extend while the paired bones internally rotate. The AP diameter increases (Ernie head). Associated with exhalation.
What are the six types of cranial strain?
Flexion/Extension, Torsion, Sidebending/Rotation, Vertical strain, Lateral strain, Compression.
What is the motion of a cranial torsion?
When the Sphenoid and the Occiput rotate in opposite directions around an AP axis.
What is a torsion strain named for?
The greater wing of the Sphenoid that is superior (i.e. a superior left Sphenoid wing would be present in a left torsion).
What is the sidebending named for with cranial diagnoses?
For cranial the sidebending is named for the convexity.
What is the motion of cranial Sidebending/Rotation?
The Sphenoid and Occiput rotate around an AP axis in the same direction while sidebending occurs through two parallel vertical axes resulting in the SBS deviating right or left.
What are the two parallel vertical axes that cranial sidebending occurs through?
One in the foramen magnum and one in the center of the sphenoid.
What is an example of a Sidebending/Rotation diagnosis?
Sidebending of the SBS to the left will cause the spenoid and occiput to rotate so that they are inferior on the left, i.e. SBRL.
Are torsions and sidebending/rotation physiologic or non-physiologic?
Torsions and sidebending/rotation are physiologic.
What is the motion of an extension strain?
The spenoid is extended (wings would be cephalad) while the SBS is caudad, limiting flexion at the SBS.
What is the motion of a flexion strain?
The sphenoid is flexed (wings would be caudad) while the SBS is cephalad, limiting extension at the SBS.
What is present with a vertical strain at the SBS?
A vertical strain is present at the SBS when the sphenoid deviates cephalad (superior vertical strain) or caudad (inferior vertical strain) in relation to the occiput.
What axes does rotation occur about in a vertical strain?
Two transverse axes, one through the center of the sphenoid and one superior to the occiput.
What is present with a lateral strain at the SBS?
A lateral strain is present at the SBS when the sphenoid deviates laterally in relation to the occiput. If the sphenoid is deviated to the left it is a left lateral torsion, and vice versa.
