cranial cavity Flashcards
cranial venous sinus is in which layer
dura matter (thickest of the layer)
falx cerebri
large sickle shaped fold of dura matter between the cerebrum hemisphere
venous sinus in relation to falx cerebri
inferior and superior sagittal sinus
straight sinus
tentorium cerebelli
tent shaped fold of dura matter separating the cerebellum from the occipital lobe of cerebrum and makes the roof of posterior cranial fossa
also makes the supratentorial and infratentorial compartments
what contains the trigeminal ganglion
the trigeminal or meckels cave is a recess of dura matter present in relation with the attachment of tentorium. it is made by the evagination inferior layer of tentorium over the trigeminal impression of the petrous temporal bone
falx cerebelli
sickle shaped fold of dura matter porjecting forward into posterior cerebellar notch
diaphrgma sellae
circular horizontal fold of dura matter forming the rood of hypophyseal fossa
anteriorly it has tuberculum sellae
posteriorly it has dorsum sellae
and has an aperture for the stalk of hypophyseal cerebri to pass
vault blood supply
middle meningeal artery
anterior cranial fossa and dural lining blood supply
meningeal branches of anterior ethmoidal, posterior ethmoidal and ophthalmic artery
middle cranial fossa blood supply
middle meningeal, accessory meningeal, internal carotid, meningeal branch of ascending pharyngeal artery
posterior cranial fossa blood supply
meningeal branches of vertebral, occipital and ascending pharyngeal arteries (voa)
nerve supply of vault
ophthalmic devision of trigeminal nerve
nerve supply of anterior cranial fossa
anterior ethmoidal and partly by maxillary nerve
nerve supply of middle cranial fossa
ant part by maxillary nerve and post part by mandibular nerve of trigeminal ganglion
nerve supply of posterior cranial fossa
recurrent branches of 1-2-3 cranial nerves and meningeal bracnhes of 9 and 10 cranial nerves
cranial venous sinuses communicate with veins outside the skull through
emissary veins
paired venous sinuses
cavernous inferior petrosal sup petrosal sigmoid transverse sphenoparetal petrosquamous middle meningeal
unpaired venous sinuses
superior sagittal inferior sagittal straight occipital ant intercavernous post intercavernous basilar plexus
intro to cavernous sinus
in middle cranial fossa on each side of sphenoid bone
anteriorly superior orbital fussre
post apex of petrous temporal bone
cavernous sinus relations outside the strcuture
sup: optic tract, optic chiasma, olfactory tract, internal carotid and anterior perforated substance
inferior: junction between body of sphenoid and greater wing
middle: hypophysis cerebri and sphenoidal air sinus
lateral; temporal lobe with uncus
ant: superior orbital fissure apex of orbit
infer: apex of petrous temporal bone
structures with in the lateral wall of cvernous sinus
oculomotor nerve- supe and inferior divisions leaves superior orbital fissure
trochlear
ophthalmic divides into labial facial nasociliary
maxillary nerve - leaves foramen rotundum
trigeminal ganglion poste part of lateral wall
structures with in the medial wall of cvernous sinus
internal carotid
abducent nerve
incoming channels into the cavernous sinus from orbit and brain
superior and inferior opthalmic veins
superficial middle cerebral vein and inferior cerebral vein
incoming channels into cavernous sinus from meninges
spheno parietal
middle meningeal vein either drain into pterygoid plexus through foramen ovale or into the spehnopalatine or cavernous sinus
draning channels of cavernous sinius
into transverse sinus through sup petrosal
into jugular throigh inf petrosal and plexus around internal carotid
pterygoid plexus by emissary vein through foramen ovale, lacerum and emissary sphenoidal foramen
facial vein though superior opthlamic vein
how right and left cavernous sinus communicate
through ant and post intercavernous sinus
tributaries of transverse sinus
superior petrosal inferor cerebral inf cerebellar diploic inferior anastomotic vein
tributaries of sigmoid sinus
mastoid and condylar emissary veins
internal auditory vein
cerebellar bein
