skull 2 Flashcards
when does the anterior, posterior, mastoid and mandible fuse by
ant-18m
post- end of 1st year
mastoid- 28 days
mandible- 2nd year
what is schapocephaly, oxycehaly and plagiocephaly
scha- premature closure of sagital (long)
Oxy- premature closure of coronal (tall)
Plag- premature closure of coronal or lamboid (flat)
how long does it take for the sutures to completely ossify on the interior and exterior
30-40 on internal
then another 10 on external
where are the jugular notch found
petronous part of the temporal bone
what travels thru the hypoglossal canals
CN 12 ( found on ocipital condyles)
What travels thru the cribriform plate
CN 1 (olfactory) -part of ethmoid bone
what travels thru the ant and post ethmoidal oppenings ( thru cribiform plate)
opthalmatic div of CN5
what can compresss the optic chasim and cause peripheral vision probs
pituitary gland
where is the supraorbital fissure located and what travels thru
bw greater and lesser wing
Cn3,4,5
what exits thru foramen rotundum
maxillary div of CN5
what exits thru foramen ovale
mandible div of CN5
what exits thru foramen spinosum
middle maningeal a and maningeal branch mandibular nerve
what exits thru internal auditory meatus
CN 7,8
what exits thru jugular foramen
CN 9,10,11
what are the 4 parts around the foramen magnum
basilar (toward front)
lateral
squamous
parts of the temporal bone
squamous
petronus
Typanic
Mastoid
what are the 3 temporal bone contents
external ear- external auditory meatus, tympanic membrane
middle ear- pharangotympanic tube, ossicles, tympanic cavity
Inner ear- cochlea, semicircular cannals
what are the 2 sensory ganglia in the inner ear
vestibular and cochlea ganglia (from vestibularchochlear n)
roof, inf wall, med wall, lat wall and post wall of tympanic cavity
Roof: Tegmental wall Inferior wall: Tympanic plate Lateral wall: tympanic membrane Medial wall: Labyrinthine wall 5. Post. Wall (Mastoid process +Facial canal +CNVII
what two branches does CN7 (facial) send in the tympanic cavity
stapedius m and tensor tympani m (both m are for dampaning purposes)
what is mastoiditis
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
borders of supramental tri
Ant.-post. border of Ext. Ac. Meatus
Sup.- Supramastoid crest
Post. – line joining the two
what attaches to styloid process (5)
Stylohyoid lig: to apex Stylomandibular lig Stylohoid m Styloglossus m Stylopharyngeus m
what runs through musculotubal cannal (3)
Tensor tympani m
Tympanic tube
Branches of pterygoid canal a (of maxillary a)
what exits out of Infraorbital foramen (canine fossa) on maxilla bone
infra orbital n
3 oppenings of zygomatic bone
z orbital, z temporal, zfaccial
where is the lacramal gland located and what does it do
top outer of orbital fossa (wettens eye)
where does the the mental and messenteric nerve run in relation to mandible
mental- runs thru mandibular foramen and out mental foramen
Messenteric- runs over mandibular notch
what protects the enterance of the mandibular foramen
Lingula
what runs thru infraorbital fissure
infraorbital n, zygomatic n
what runs thru Sphenopalatine foramen
Spenopalatine n (Maxillary n) & Sphenopalatine a of Max. artery
what travels thru Greater & lesser palatine foramina
Greater & lesser palatine foramina
greater + lesser palantine n
what runs thru Pterygoid canal
greater petrosal n of facial n + deep petrosal
walls of the orbit
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
what runs thru Superior orbital fissure
CN: III, IV, VI; CN5 (V1)
what runs thru Zygomaticoorbital foramen
z facial and z temporal
Zygomaticofacial & zygomatictemporal n
