Chapter 9 Somatic Dysfunctions Flashcards
Axis/plane of motion in torsion?
AP axis, coronal plane
Torsion motions?
Sphenoid rotates one direction about AP axis, occiput rotation in opposite direction
How are torsion SDs named?
Named for greater wing of sphenoid that is more superior
Axes of motion in SB/rotation?
Rotation about an AP axis thru SBS; sidebending about 2 parallel vertical axes–one passing thru foramen magnum and other thru center of sphenoid
SB/rotation motions?
Sphenoid and occiput rotate in SAME direction (unlike torsion) and sidebending about the vertical axes causing deviation of SBS to either right or left
Sidebending to left will cause what rotation?
Sphenoid and occiput will rotate so that they are inferior on the left
Sidebending causes the SBS to deviate which way?
Right SB causes deviation of SBS to right and vice versa
Extension causes what motion of SBS?
SBS will move caudad
Flexion causes what motion of SBS?
SBS will move cephalad
What is vertical strain?
When sphenoid deviates cephalad or caudad in relation to the occiput
Axes of motion in vertical strain?
One tranverse axis thru center of sphenoid, other transverse axis just superior to occiput
What is lateral strain?
Sphenoid deviates laterally in relation to occiput
Axes of motion in lateral strain?
One vertical axis thru center of sphenoid, one vertical axis thru foramen magnum
Compression?
When sphenoid and occiput are pushed together causing decreased amplitude of flexion and extension
Cause of compression?
Trauma to back of head–if severe enough can obliterate CRI
