Paired and midline bones Flashcards
Which midline bones rotate about a transcerse axis?
- occiput
- sphenoid
- ethmoid
- vomer
What bones does the vomer articulate with? What drives its motion?
- sphenoid
- ethnoid
- septal cartilage
- maxillae
- palatines
Sphenoid drives vomer motion
When SBS is in flexion what how does the ethmoid move in relation to the occipiut?
Same direction
When SBS is in flexion how does the vomer move in relation to the sphenoid?
Same direction
What bones does the parietal bone articulate with?
- ociput
- frontal
- sphenoid
- temporal
- other parietal
What is the only bonew that contacts all 4 fontanelles?
Parietal
What muscles attach to the temporal bone?
- splenius capitus
- longissimus capitus
- digastric
- SCM
- stylohyoid
- Stylohyoid
- Styloglossus
- Masseter
Vault contact?
- index fingers greater wing of sphenoid posterior to the frontozygomatic suture
- middle finger anterior to ear
- ring finger on mastoid process
- pinky finger on occiput
- palms on parietals
- thumbs contact frontal
frontal occipital contact?
- posterior contact occiptal hand rests on table cradling head and occiput
- anterior contact frontal hand thumb pads on greater wing inferior to frontozygomatic suture
- index finger or middle on greater wing
- palms on anterior aspect of frontal bone
Becker contact?
- thumbs on greater wing inferior to frontozygomatic suture
- index fingers on mastoid process
- middle to pinky on occiput with middle finger posterior to OM suture
- Palms cup occiput and posterior aspect of parietals
Physiologic patterns?
- flexion
- extension
- torsion
- sidebending rotation
torsion axis?
- one sagittal axis opposite rotation
Torsion finger movement?
- 1st finger and fifth finger of one hand moves superiorly while other moves inferiorly
Axes of sidebending rotation?
- one sagittal same direction
- two vertical opposite motion
How do fingers move on sidebending rotation?
- named side feels fuller with the 1st finger and 5th move away from each other
- opposite side shrinks
Vertical strain axes?
- two parallel transverse axes that rotate in same direction
superior vertical strain vs inferior vertical strain finger movement?
- superior rotates anteriorly
- 1st fingers move away fifth fingers move towards dr
- inferior rotates posteriorly
- 1st fingers move toward dr and 5th moves away
Lateral strain axes?
- two vertical axes with motion in same direction
- named for where base of sphenoid goes
How do fingers move with a lateral strain?
- 1st fingers move opposite 5th and side of strain moves slightly anterior
What non physiologic strain mimics other patterns?
Compression
Where would trauma occcur to cause a lateral strain?
Anterior or posterior to the SBS
Where would trauma occur to cause sidebending rotation?
Directly at the sbs
Where would trauma occur to cause vertical strain?
superior or inferior force anterior or posterior to the SBS
where would trauma occur to cause a torsion?
rotational force anterior or posterior to the SBS
