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Cranial Cavity
Structure
Contents
Meninges
Brain
Cranial nerve
Blood vessel
Cranial venous sinus
2017 龔秀妮
Structure
Diploic vein
Diploë
External table
Internal table
Structure: Parts of cranium-1
Neurocranium
CS
P
LS
F
SS
T
S
O
Z
M
M
Viscerocranium
(Facial skeleton)
Neurocranium:
4 single bones-frontal, occipital, sphenoid, and ethmoid bones
2 sets of bones-parietal and temporal bones
Viscerocranium
(Facial skeleton)
3 single bones – (middle)
ethmoid, vomer, mandible
bones
6 paired bones –
lacrimal, nasal, inferior
nasal conchae, maxillae,
zygomatic, palatine bones
Neurocranium
Viscerocranium
(Facial skeleton)
Structure: Parts of cranium-2
Roof/Calvaria/Skull cap-flat bone-F,P,O
Bregma
Lambda
Floor/Cranial base/Basicranium/ Chondrocranium-
irregular bone-S,T
Roof/Calvaria/Skull cap-flat bone
Bregma
Emissary vein
Lambda
Granular foveola
Floor/Cranial base/Basicranium
Cranial cavity
Anterior cranium fossa
Border: Sphenoid
ant. clinoid process
lesser wing
Content: Frontal bone
Sphenoid (ant. part)
Cribriform plate
Olfactory Foramina: Olfactory n. [I]
Foramen cecum: Emissary vein to
nasal cavity
Optic canal : Optic n. [II]
Ophthalmic a
Middle cranium fossa
Border: chiasmatic sulcus + greater wing
Dorsum sellae + petrous part of temporal bone
Content: Sphenoid bone
Temporal bone
Middle cranium fossa
Sup. Orbital fissure : [III][IV][VI][V1], ophthalmic vein
Foramen rotundum : [V2]
Foramen ovale : [V3], lesser petrosal n.
Foramen spinosum : middle meningeal a.
Foramen lacerum : cartilage (greater petrosal n. pass)
Posterior cranium fossa
Foramen magnum:
Border: dorsal sellae and clivus
petrous part of temporal bone medulla oblongata, V a., accessory n.
Internal acoustic meatus:
Content: temporal bone
[VII][VIII],labyrinthine a.
occipital bone
Jugular foramen: [IX][X][XI]
Hypoglossal canal: [XII]
Contents-Meninges
arachnoid
trabeculae
Granular foveola
Hematoma
Extradural
Subdural
Subarachnoid
Dural partitions (infoldings)
1.
4.
Frontal crest
tentorial notch
Sellar diaphragm
2.
3.
Dural innervation
(sensory)
Contents-Brain
Contents-Cranial nerve
Foramina of cribriform plate
Superior orbital fissure (3,4,6,5-1)
Foramen rotundum (5-2)
Foramen ovale (5-3)
Optic canal
Internal acoustic meatus (7,8)
Jugular foramen (9,10,11)
Hypoglossal canal
Reference
Reference
Contents-Blood vessel
Perforate dura
and arachnoid
Transverse
foramina
ant. circulation
post. circulation
Circle of cerebral arteries
Circle of Willis
Pontine arteries
Contents-Cranial venous sinus
Cavernous sinus
1 superior ophthalmic vein
2 anterior intercavernous sinus
3 inferior ophthalmic vein
4 pterygoid plexus
5 middle meningeal vein
6 superior petrosal sinus
7 inferior petrosal sinus
8 basilar venous plexus
9 transverse sinus
10 posterior intercavernous sinus
11 cavernous sinus
12 sphenoparietal sinus
Components in
cavernous sinus
Internal carotid a.
CN VI
CN III
CN IV
CN V1
CN V2
Ventricular system of the brain
only way to spinal cord
Cistern – cranial base
(Basal cistern)
(Pontine cistern)
Lateral cerebellomedullary cistern
the largest cistern