OCMM Midline and Paired Bones Flashcards
What are the midline bones in the cranial vault?
Occipital
Sphenoid
What are the midline bones in the face?
Vomer
Ethmoid
Mandible
What are the paired bones in the cranial vault?
Frontals Parietals Temporals - Squamous Occiput - Greater wings of the sphenoid
What are the paired bones in the cranial vault?
Frontals Parietals Temporals - Squamous Occiput - Greater wings of the sphenoid
What axis do the midline bones move around, and thus, what are their movement options?
Transverse axis
= Flexion or Extension
Paired bones have many axes, what are their movement options?
External or Internal Rotation
With Cranial Flexion, which direction do paired bones move?
External Rotation
If the paired bones are externally rotating, what direction is the cranium going?
Flexion
The Ethmoid moves in the same direction as which bone?
Occiput
The Vomer moves in the same direction as which bone?
Sphenoid
With the Vault contact, where is the index finger?
Greater wing of sphenoid
– posterior to frontozygomatic suture
With the Vault contact, where is the middle finger?
Anterior to the ear
With the Vault contact, where is the ring finger?
Mastoid process
With the Vault contact, where is the pinky finger?
Toward the occiput
With the Vault contact, where are the thumbs?
On the frontal bones
With the Vault contact, what bones are the palms on?
Parietal bones
Describe the Frontal Occipital Contact?
One hand cradling head via occiput
Other hand has one thumb on the greater wing of the sphenoid and the index/middle finger on the other greater wing of the sphenoid
Describe the Becker contact?
Thumbs on the greater sphenoid wings and rest of fingers behind the ears
With Cranial Flexion, how will the head feel?
Short and fat
With Cranial Flexion, how do your hands move?
Fingers spread and move away from you
With Cranial Extension, how will the head feel?
Tall and narrow
With Cranial Extension, how do your hands move?
Fingers move towards you
What axis does Torsion occur around?
Sagittal
Torsion is named for what?
Higher sphenoid greater wing
With Torsion, the sphenoid and occiput move in _____ directions
Opposite
How will Torsion feel in your hands?
1st and 5th fingers on one hand move superiorly and the other hands move inferiorly
How do the hands move with RIGHT TORSION?
Right 1st and 5th fingers move superiorly
Left 1st and 5th fingers move inferiorly
What axes does Sidebending Rotation occur around and what are the sphenoid/occiput movements?
1 Sagittal = bones move in SAME direction
2 Vertical = bones move in OPPOSITE directions
On the named side for Sidebending Rotation, how will the head feel?
“fuller”
= 1st and 5th fingers move away from each other
On the opposite side of the Sidebending Rotation, how will the hands move?
“shrink”
= 1st and 5th fingers move towards each other
How do the hands move with RIGHT SIDEBENDING ROTATION?
Right fingers move away from eachother
Left fingers move toward eachother
What axes does Vertical Strain occur around and what are the movements of the sphenoid/occiput?
2 Transverse axes
= Motion in the same direction
Superior Vertical Strain
Bones rotate ANTERIORLY
How do your hands move with Superior Vertical Strain?
1st fingers move AWAY from you
Inferior Vertical Strain
Bones rotate POSTERIORLY
How do your hands move with Inferior Vertical Strain?
1st fingers move toward you
Lateral Strain is named for the direction of?
Base of sphenoid
What axes does Lateral Strain occur around and what are the movements of the sphenoid/occiput?
2 vertical axes
= Motion in the same direction
For Lateral Strain, it is named for the direction that what fingers go?
Pinky fingers
– right lateral strain = pinky’s go to the right
How does Lateral Strain feel in your hands?
1st fingers move opposite the direction of the 5th fingers
