skull 2

Question 1

when does the anterior, posterior, mastoid and mandible fuse by

Answer 1

ant-18m
post- end of 1st year
mastoid- 28 days
mandible- 2nd year

Question 2

what is schapocephaly, oxycehaly and plagiocephaly

Answer 2

scha- premature closure of sagital (long)

Oxy- premature closure of coronal (tall)

Plag- premature closure of coronal or lamboid (flat)

Question 3

how long does it take for the sutures to completely ossify on the interior and exterior

Answer 3

30-40 on internal

then another 10 on external

Question 4

where are the jugular notch found

Answer 4

petronous part of the temporal bone

Question 5

what travels thru the hypoglossal canals

Answer 5

CN 12 ( found on ocipital condyles)

Question 6

What travels thru the cribriform plate

Answer 6

CN 1 (olfactory) -part of ethmoid bone

Question 7

what travels thru the ant and post ethmoidal oppenings ( thru cribiform plate)

Answer 7

opthalmatic div of CN5

Question 8

what can compresss the optic chasim and cause peripheral vision probs

Answer 8

pituitary gland

Question 9

where is the supraorbital fissure located and what travels thru

Answer 9

bw greater and lesser wing

Cn3,4,5

Question 10

what exits thru foramen rotundum

Answer 10

maxillary div of CN5

Question 11

what exits thru foramen ovale

Answer 11

mandible div of CN5

Question 12

what exits thru foramen spinosum

Answer 12

middle maningeal a and maningeal branch mandibular nerve

Question 13

what exits thru internal auditory meatus

Answer 13

CN 7,8

Question 14

what exits thru jugular foramen

Answer 14

CN 9,10,11

Question 15

what are the 4 parts around the foramen magnum

Answer 15

basilar (toward front)
lateral
squamous

Question 16

parts of the temporal bone

Answer 16

squamous
petronus
Typanic
Mastoid

Question 17

what are the 3 temporal bone contents

Answer 17

external ear- external auditory meatus, tympanic membrane

middle ear- pharangotympanic tube, ossicles, tympanic cavity

Inner ear- cochlea, semicircular cannals

Question 18

what are the 2 sensory ganglia in the inner ear

Answer 18

vestibular and cochlea ganglia (from vestibularchochlear n)

Question 19

roof, inf wall, med wall, lat wall and post wall of tympanic cavity

Answer 19

Roof: Tegmental wall
Inferior wall: Tympanic plate
Lateral wall: tympanic membrane
Medial wall: Labyrinthine wall
5. Post. Wall (Mastoid process +Facial canal +CNVII

Question 20

what two branches does CN7 (facial) send in the tympanic cavity

Answer 20

stapedius m and tensor tympani m (both m are for dampaning purposes)

Question 21

what is mastoiditis

Answer 21

is an inflammation of mucosal lining of mastoid antrum & mastoid air cell system inside mastoid process as a result of an unresolved middle ear infection

Question 22

borders of supramental tri

Answer 22

Ant.-post. border of Ext. Ac. Meatus
Sup.- Supramastoid crest
Post. – line joining the two

Question 23

what attaches to styloid process (5)

Answer 23

Stylohyoid lig: to apex
Stylomandibular lig
Stylohoid m
Styloglossus m
Stylopharyngeus m

Question 24

what runs through musculotubal cannal (3)

Answer 24

Tensor tympani m
Tympanic tube
Branches of pterygoid canal a (of maxillary a)

Question 25

what exits out of Infraorbital foramen (canine fossa) on maxilla bone

Answer 25

infra orbital n

Question 26

3 oppenings of zygomatic bone

Answer 26

z orbital, z temporal, zfaccial

Question 27

where is the lacramal gland located and what does it do

Answer 27

top outer of orbital fossa (wettens eye)

Question 28

where does the the mental and messenteric nerve run in relation to mandible

Answer 28

mental- runs thru mandibular foramen and out mental foramen Messenteric- runs over mandibular notch

Question 29

what protects the enterance of the mandibular foramen

Answer 29

Lingula

Question 30

what runs thru infraorbital fissure

Answer 30

infraorbital n, zygomatic n

Question 31

what runs thru Sphenopalatine foramen

Answer 31

Spenopalatine n (Maxillary n) & Sphenopalatine a of Max. artery

Question 32

what travels thru Greater & lesser palatine foramina | Greater & lesser palatine foramina

Answer 32

greater + lesser palantine n

Question 33

what runs thru Pterygoid canal

Answer 33

greater petrosal n of facial n + deep petrosal

Question 34

walls of the orbit

Answer 34

Superior: orbital part of frontal, lesser wing of sphenoid. Inferior: orbital surface of body of maxilla Lateral: orbital surface of frontal process of zygomatic + orbital surface of greater wing of sphenoid. Medial: lacrimal, orbital plate of ethmoid, body of sphenoid

Question 35

what runs thru Superior orbital fissure

Answer 35

CN: III, IV, VI; CN5 (V1)

Question 36

what runs thru Zygomaticoorbital foramen | z facial and z temporal

Answer 36

Zygomaticofacial & zygomatictemporal n