OCMM Intro

Question 1

What are the 5 features of PRM?

Answer 1

1. The inherent motility of the brain and SC
2. Fluctuation of CSF
3. Mobility of the intracranial and intraspinal membranes
4. The articular mobility of the cranial bones
5. The mobility of the sacrum b/w the ilia that is interdependent with the motion of the SBS

Question 2

What exits the foramen cecum?

Answer 2

Vein to superior sagittal sinus

Question 3

What exits the anterior ethmoidal foramen?

Answer 3

Anterior ehtmoidal A, V and N

Question 4

What exits the foramina of the ciribiform plate?

Answer 4

Olfactory nerve bundles

Question 5

What exits the posterior ethmoidal foramen?

Answer 5

Posterior ehtmoidal A, V and N

Question 6

What exits the optic canal?

Answer 6

Optic N and opthalmic A

Question 7

What exits the superior orbital fissure?

Answer 7

Oculomotor N, trochlear N, opthalmic N, abducens N, superior othalmic vein

Question 8

What exits the foramen rotundum?

Answer 8

Maxillary N

Question 9

What exits the foramen ovale?

Answer 9

Mandibular N, accessory meningeal A, lesser petrosal N

Question 10

What exits the foramen spinosum?

Answer 10

Middle menigieal A and V, meningeal branch of mandibular N

Question 11

What exits the foramen lacerum?

Answer 11

Interior carotid A and inferior carotid N plexus

Question 12

What exits the inferior acoustic meatus?

Answer 12

Facial N (VII), vestibulocochlear N, labyrinthine A

Question 13

What exits the jugular foramen?

Answer 13

Inferior petrosal sinus, glossopharyngeal N, vagus N, accessory N, sigmoid sinus, posterior meningeal A

Question 14

What exits the hypoglossal canal?

Answer 14

Hypoglossal N (XII)

Question 15

What exits the foramen magnum?

Answer 15

Medulla, meninges, vertebral A, spinal roots of accessory nerves

Question 16

What is the SBS?

Answer 16

The basisphenoid and the basiocciput join by a synchondrosis

Question 17

What is a synchondrosis?

Answer 17

Relatively rigid hyaline cartilagenous junction similar to cartilage like the sterno-manubrial joint

Question 18

How do the midline bones move?

Answer 18

Move in flexion/extension; most rotate about a tranverse axis in a anterior/posterior direction

Question 19

In which direction do paired bones move?

Answer 19

In internal/external rotation; have variable axes and are always labeled external/internal rotation

Question 20

What bones make up the cranial vault?

Answer 20

Frontal, parietals, squamous temporals, squamous occiput, greater wing of sphenoid

Question 21

What are the facial bones?

Answer 21

Inferior nasal concha, lacrimal, maxilla, nasal, palatine, zygoma, frontal

Question 22

Which parts of the cranial vault rotate externally?

Answer 22

Frontals, parietals and temporals

Question 23

Which facial bones rotate externally?

Answer 23

Maxilla, palatines, zygomae

Question 24

In which direction does the sagittal articulation of the parietal bone move during flexion/external rotation?

Answer 24

Moves inferiorly

Question 25

In which direction does the temporal articulation of the parietal bone move during flexion/external rotation?

Answer 25

Moves laterally; cranium widens laterally

Question 26

In which direction does the sagittal articulation of the parietal bone move during extension/internal rotation?

Answer 26

Moves superiorly

Question 27

In which direction does the temporal articulation of the parietal bone move during extension/internal rotation?

Answer 27

Moves medially; cranium narrows laterally

Question 28

What direction does the frontal bone move during external rotation (during SBS flexion)?

Answer 28

Lateral portion moves anterior/lateral and slightly inferior, glabella moves posteriorly

Question 29

What direction does the frontal bone move in internal rotation (during SBS extension)?

Answer 29

Lateral side moves posterior/medual and slightly superior, glabella moves anteriorly

Question 30

What axis is present on the frontal bone?

Answer 30

Metopic has hing like action; horizontal plane motion through vertical axis; axis from center of orbital roof thru frontal eminence

Question 31

Describe flexion of the ethmoid

Answer 31

The perpendicular plate is rotated by the sphenoid about its transverse axis; this swings the crista galli superiorly and posteriorly

Question 32

Describe extension of the ethmoid

Answer 32

The perpendicular plate is rotated by the sphenoid about its transverse axis; this swings the cristal galli inferiorly and anteriorly

Question 33

What is the motion of the vomer?

Answer 33

Drives the palatines and maxillaries, follows sphenoid like the beak of a winged bird, depresses the hard palate with SBS flexion, flexion (wide flat palate), extensin (narrow tall palate)

Question 34

Which way does the posterior part of the vomer move?

Answer 34

Depresses the palatines, flattening the roof of the mouth

Question 35

Which way does the anterior part of the vomer move?

Answer 35

Descends to externally rotate the premaxillae