Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

OS > Cranial Midline Bones > Flashcards

Cranial Midline Bones Flashcards

1
Q

Midline/unpaired bones

A

Cranial - ethmoid, occiput, sphenoid

Facial - mandible, vomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Motion of the midline bones

A

Usually rotate about TRANSVERSE axis in SAGGITAL plane, in ANTERIOR-POSTERIOR direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Paired bones

A

Cranial - parietal, temporal

Facial - inf nasal concha, lacrimal, maxilla, nasal. palantine, zygoma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Motion of paired bones

A

Usually around the AP axis in lateral motion (CORONAL PLANE) in EXTERNAL/INTERNAL ROTATION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Motion of SBS
Inhalation-flexion:
- sphenoid rotation, axis, direction
-occiput rotation, axis, direction

A

Sphenoid:
TRANSVERSE axis
Alae move ANTERIORLY
SBS motion is SUPERIOR

Occiput:
TRANSVERSE axis
Occiput move Posterior
SBS motion is SUPERIOR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

SBS motion Cranial Flexion

A 
SBS moves SUPERIOR
Occiput - inf/post
Sphenoid - ant/inf
Ethmoid - same as occiput
Palantine - ER
Interpalantine suture - inf with vomer and maxillae
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Ethmoid mirrors what bone’s motion?

A

Occiput

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Vomer same as what bone’s motion?

A

Sphenoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

SBS and sacral motion - about what axis, in what plane and at what sacral segment

A

Transverse axis, thru 2nd sacral segment, in sagital plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Sacral base moves in what direction in cranial flexion?

Also called what?

A

Sacral base posterior, apex anterior

Counterutation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Sacral base moves in what direction in cranial extension?

A

Sacral base moves anterior, apex posterior

Nutation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Ethmoid motion when SBS is in flexion is influenced by what?

A

sphenoid and falx cerebri

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q 
Lateral mass (ethmoid) motion during cranial flexion?
Cranial extension?
A

Cranial flexion - external rotation

Cranial extension - internal rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

SBS lateral strain - named for what?
Axis
*Sphenoid and occiput move in same or opposite direction?

A

Named for position of basi-sphenoid relative to basi-occiput
Two vertical axes.
Same direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Basi-sphenoid shears right around vertical axis, occiput and sphenoid both rotate to the left around their vertical axes.
What is this strain pattern?

A

Right lateral strain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

SBS vertical strain - named for what?
Axis
Plane of motion
*Sphenoid and occiput move in what direction?

A

Position of basi-SPHENOID(sup or inf)
Transverse axis
Motion in sagittal plane
Sphenoid and occiput move in opposite directions (one into extension, one into flexion)

17
Q

Posterior direction = what vertical strain pattern?
Occiput into what position?
Sphenoid into what position?

A

inferior vertical strain
Occiput into flexion
Sphenoid into extension

18
Q

Sphenoid extension, occiput flexion “thumbs point to doc”

A

Inferior vertical strain

19
Q

SBS torsion - named for what?
Axis
Plane of motion
*Sphenoid and occiput move in what direction?

A

Named for more CEPHALAD greater wing of sphenoid
CORONAL PLANE
Sphenoid and occiput move in opposite directions

20
Q

Abormal felxion/extension while sphenoid twists R (greater wing elevates on L), occiput twists L at SBS, L basi-sphenoid; “hands twist on each other with left thumb pointing to doc and right thumb moving away.
*What strain pattern is this?

A

left torsion

21
Q

SBS torsion - relative change of other bones

  1. temporal and parietal
  2. mandible
  3. orbit
  4. membranes
A

temporal and parietal - ER on side of torsion
mandible - shifted toward side of torsion
orbit - smaller on side of torsion
membranes - falx (ant end rotates wtih sphenoid, post end rotates with occiput), tentorium (SB in same direction the occiput rotates), spinal dura (inf on side of low occiput)

22
Q 
SBS SB and Rotation - named for what?
SB and Rotation:
Axis
Plane of motion
*Sphenoid and occiput move in what direction?
A

Named for the CONVEXITY (wider side)
SB: 2 VERTICAL axes in the TRANSVERSE plane.
SB - sph and occ move in opposite directions
Rotation: 1 AP axis (like torsion) in CORONAL plane
Rot - sph and occ move in same direction

23
Q

Side bending and rotation - rotation occurs to side of what? In what direction?

A

convexity

inferior or caudad

24
Q

Sphenoid rotated L, SB R and occiput rotated R, SB R

A

Right SB rotation

25
Q

SBS SB and Rotation - changes in other bones and membreanes

  1. temporal and parietal
  2. mandible
  3. orbit
  4. membranes
A
  1. temporal and parietal - externally rotated on convex
  2. mandible - shifted to convex side
  3. orbit - anterior on convex side
  4. membranes - falx (SB follows convexity of SBS of SBS), tentorium (follows occipital motion), spinal dura (inf on convexity)
26
Q

Compression of SBS describe:

Due to, cranium feels like

A

due to trauma or pressure to head (i.e. infant cranium at birth)
Cranium feel rigid

27
Q

Flexion of SBS

A

elevation of Sphenobasilar junction. All midline bones rotate around transverse axis. All paired lateral bones move into external rotation.

OS (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions