Transcript Skull I. Neurocranium II. Viscerocranium

Skull
I. Neurocranium
II. Viscerocranium
I. Neurocranium
• Fossa cranii caudalis
Tentorium cerebelli osseum
• Fossa cranii medii
Crista orbitosphenoidalis
• Fossa cranii rostralis
Fossa cranii caudalis
inner (cerebellar) surface
ventrally:
• Impressio medullaris – sagittal
medulla oblongata (brain - spinal cord)
• Impressio pontina – transverse
pons – bridge
dorsally:
• Impressio vermialis - sagittal
cerebellar vermis
tentorium cerebelli osseum
Fossa cranii media
med.  lat.
• fossa hypophysealis (sella turcica)
• sulcus nervi ophthalmici (med.)
• sulcus nervi maxillaris (lat.)
spina ossis sphenoidalis
• fossa piriformis
• impressiones digitatae (imp. gyrorum)
rostr., median:
sulcus chiasmatis (sulcus nervi optici)
Fossa cranii rostralis
caud.: crista orbitosphenoidalis
rostr.: lamina cribrosa / nasal cavity
2x fossa ethmoidalis (olfactory bulb), for. ethmoidale
impressiones digitatae (imp. gyrorum)
rostrum (ossis sphen.), crista galli, crista sagittalis
interna
dors.  ventr.
For. ethmoidale
Foramen opticum
For. ethmoidale
Sulcus chiasmatis
Fissura orbitalis
Foramen rotundum/
For. alare rostrale
Sulcus n. ophthalmici
Sulcus n. maxillaris/
For. alare caudale
Ru+ Sus: For. orbitorotundum
Eq: For. alare parvum – dorsally
Ca: 2x For. ethmoidale
Os temporale:
squama ossis temporale
os petrosum
Os petrosum:
pars tympanica
pars petrosa
pars mastoidea
proc. muscularis (thin, needle-like)
proc. styloideus (for the hyoide bone)
(not in Ca, Sus)
orientation on petrosal bone:
lat.:
porus acusticus externus
pars mastoidea situated laterally
rostroventrally directed:
proc. muscularis
proc. styloideus
os petrosum, med. aspect
porus acusticus internus  meatus  fundus (4 openings)
rostrodors.: area n. facialis (introitus canalis n. VII.)
rostroventr.: area cochleae
caudodors.: for. vestibulare dors.
caudoventr.: for. vestibulare ventr.
caud., dors.: apertura externa aquaeductus vestibuli
caud. ventr.: apertura externa canaliculi cochleae
rostr., dors.: fovea ganglii semilunaris =
fov. ganglii nervi trigemini
skull, ventral surface
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for. magnum
for. nervi hypoglossi
for. jugulare (= for. lacerum aborale)
Eq.: for. lacerum (orale)
med.: incisura carotica (lat. + med.?)
inc. ovale
lat.: inc. spinosa
– for. alare caudale
– for. retroarticulare
– for. stylomastoideum
II. Viscerocranium
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meatus nasi dors.  lamina cribrosa ( olfactory bulb)
meatus nasi medius  sinus paranasales (eq – 1 system)
meatus nasi ventr.  pharynx ( larynx  trachea)
meatus nasi communis (next to septum nasi)
Orbit
fossa sacci lacrimalis (rostr.  nasal cavity)
fossa glandulae lacrimalis (“lat.”, but within the orbit)
fossa musculi obliqui ventr. (medioventr.)
fovea trochlearis (mediodors., for m. obliquus dors.)
Ca, Sus: ligamentum orbitale
Arcus zygomaticus
Os temporale, proc. zygomaticus
Os zygomaticum, proc. temporale
Os frontale, proc. zygomaticus
Ca, Sus: Lig. orbitale
fossa pterygopalatina
caud.  rostr.
For. maxillare
For. infraorbitale
For. sphenopalatinum
Cavum nasi
For palatinum caud.
For palatinum majus
palatum durum (hard palate)
os palatinum, lamina horizontalis
maxilla, proc. palatinus
os incisivum, proc. palatinus
– margo interalveolaris (= diastema)
– septa interaleveolaria
– septa intraalveolaria (= interradicularia)
rostr.: foramen interincisiva (Ca, Eq)
fissura interincisiva (Ru, Sus)
Mandibula
lat.: fossa masseterica, rostr.: for. mentale
med.: fossa pterygoidea, caud.: for. mandibulae
facies lingualis / fac. labialis + fac. buccalis
interspec. diff.:
margo ventr. – shape
angulus mandibulae
Eq: tuberositas musculi sternomandibularis
Ca: proc. angularis (caudovetr.)