Y2B2 Omm- Cranial Developmental And Applied Anatomy 2 Skills Prep

Front 1

what are the five types of cranial sutures? give an example of each

Back 1

serrated: sagittal suture
squamous: squamoparietal suture
harmonic: lacrimoethmoidal suture
gomphosis: greater wing of sphenoid and body
combination (irregular)- no example given

Front 2

what is beveling?

Back 2

slope of a cranial articular surface in relation to the inner and outer table of bone.

Front 3

what are the two classifications of joints? what does each one mean?

Back 3

synarthrosis: articulation w/o a joint cavity
diarthrosis: articulation w/ a joint cavity

Front 4

what are the two subcategories of synarthrosis? what differentiates the two? give an example of each.

Back 4

synchondrosis: cartilaginous union -> sphenobasilar symphysis
syndesmosis: ligamentous union --> petrosphenoid ligament

Front 5

what is an example of a diarthrosis joint?

Back 5

temporomandibular joint

Front 6

what are the three premature suture closures?

Back 6

coronal suture, sagittal suture, and coronal and lambdoid sutures

Front 7

what are the two physiologic motions of the SBS? what is the SBS?

Back 7

sphenobasilar synchrondrosis

-Flexion/external rotation
-extension/ internal rotation

Front 8

what are the midline bones? what are their motions?

Back 8

sphenoid, occiput, vomer, ethmoid, sacrum

motion: Flexion and extension

Front 9

what are the paired bones? what are their motions?

Back 9

parietals, frontals, temporals, zygomae, maxillae, nasals, lacrimals, palatines

external and internal rotation

Front 10

during cranial flexion, what does the sacrum do?

Back 10

counternutates

Front 11

during cranial extension, what does the sacrum do?

Back 11

nutate

Front 12

During cranial flexion, where do all the midline bones move? where do all the paired bones move?

Back 12

midline--> move in flexion
paired--> move into external rotation

Front 13

during cranial extension, where do all the midline bones move? where do all the paired bones move?

Back 13

midline--> extension
paired--> internal rotation

Front 14

what is the axis of motion of the sphenoid? where is it located? how does it move?

Back 14

transverse axis (anterior to and on the level w/ the floor of the sella turcica). Flexion/extension

Front 15

what is the axis of motion of the occiput? where is it located?how does it move?

Back 15

transverse axis
located above jugular process of occiput at level of SBS
flexion/ extension

Front 16

what happens to the cranial vault during flexion of the SBS?

Back 16

the vault widens--> palate widens and flattens, A-P diameter decreases, superior-inferior diameter decreases, transverse diameter increases

Front 17

what happens to the cranial vault during extension of the SBS?

Back 17

the vault narrows -->palate heightens and narrows, A-P diameter and superior-inferior diameter increase, transverse diameter decreases

Front 18

what bone influences the motion of the temporal bones?

Back 18

occiput

Front 19

what is the axis of motion of the temporal bones? what motions does it do?

Back 19

axis: approximately through the petrous ridge and converges anteriomedially
motions: external and internal rotation

Front 20

what are the axis of motion of the parietal bone? what motions does it do?

Back 20

2 axis that converge anteriorly:
from a point lateral to the bregma on coronal border in posterolateral direction through the parietal eminence.

aka: forming a V with the sagittal suture inbetween the lines and the point being towards the frontal bone.

motion: external and internal rotation

Front 21

what is the axis of motion of the frontal bone? what motion does it do?

Back 21

roughly from center of each orbital plate through frontal eminence

motion: external and internal rotation

Front 22

what are the three sacral axes? what axis are they each associated with?

Back 22

superior transverse axis- respiratory axis
middle transverse axis- postural axis
inferior transverse axis- hip bone axis

Front 23

what is causing the superiorposterior movement of the sacrum during cranial flexion?

Back 23

the dura connecting the occiput and sacrum. when the occiput externally rotates it pulls the dura up and in with it causing the sacrum to move up and out.