Cranial Movement and Strain Patterns

Question 1

6 types of Strains

Answer 1

1. Flexion/Extension
2. Torsion
3. Sidebending/Rotation
4. Vertical Strain
5. Lateral Strain
6. Compression

Question 2

Describe a Torsion Strain

Answer 2

Anterior structures rotate opposite the posterior structures.
AP Axis
Named for superior greater wing of sphenoid
“Which gun goes off”- The Texan in Christian

Question 3

Describe a Sidebending/Rotation Strain

Answer 3

SBS translates to the named side of dysfunction (left sidebending=SBS moving to the left)
3 Axes: 2 vertical (base of sphenoid + Foramen Magnum) 1 AP axis

Named for side that WIDENS

Rotation occurs the same way as the side bending

Question 4

Describe a flexion/extension strain

Answer 4

Normal unless one is more accentuated than the other

Question 5

Describe a vertical strain

Answer 5

Named for the direction of the base of sphenoid
2 transverse axes (sphenoid base+ superior occiput)

Index finger moves away from you= flexion
Index toward you= Extension

Question 6

Describe a lateral strain

Answer 6

Occurs about 2 vertical axes through sphenoid and foramen magnum
Hands fall AWAY from affected side (or pinkies go towards the affected side)
The affected side also rotates anterior

Question 7

Describe a compression strain

Answer 7

Occiput and Sphenoid are smashed into each other at the SBS.
Sagittal Axis
Causes include childbirth and head trauma from the front or back