cranial cavity

Question 1

cranial venous sinus is in which layer

Answer 1

dura matter (thickest of the layer)

Question 2

falx cerebri

Answer 2

large sickle shaped fold of dura matter between the cerebrum hemisphere

Question 3

venous sinus in relation to falx cerebri

Answer 3

inferior and superior sagittal sinus

straight sinus

Question 4

tentorium cerebelli

Answer 4

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

Question 5

what contains the trigeminal ganglion

Answer 5

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

Question 6

falx cerebelli

Answer 6

sickle shaped fold of dura matter porjecting forward into posterior cerebellar notch

Question 7

diaphrgma sellae

Answer 7

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

Question 8

vault blood supply

Answer 8

middle meningeal artery

Question 9

anterior cranial fossa and dural lining blood supply

Answer 9

meningeal branches of anterior ethmoidal, posterior ethmoidal and ophthalmic artery

Question 10

middle cranial fossa blood supply

Answer 10

middle meningeal, accessory meningeal, internal carotid, meningeal branch of ascending pharyngeal artery

Question 11

posterior cranial fossa blood supply

Answer 11

meningeal branches of vertebral, occipital and ascending pharyngeal arteries (voa)

Question 12

nerve supply of vault

Answer 12

ophthalmic devision of trigeminal nerve

Question 13

nerve supply of anterior cranial fossa

Answer 13

anterior ethmoidal and partly by maxillary nerve

Question 14

nerve supply of middle cranial fossa

Answer 14

ant part by maxillary nerve and post part by mandibular nerve of trigeminal ganglion

Question 15

nerve supply of posterior cranial fossa

Answer 15

recurrent branches of 1-2-3 cranial nerves and meningeal bracnhes of 9 and 10 cranial nerves

Question 16

cranial venous sinuses communicate with veins outside the skull through

Answer 16

emissary veins

Question 17

paired venous sinuses

Answer 17

cavernous 
inferior petrosal
sup petrosal
sigmoid
transverse 
sphenoparetal
petrosquamous 
middle meningeal

Question 18

unpaired venous sinuses

Answer 18

superior sagittal 
inferior sagittal 
straight 
occipital
ant intercavernous 
post intercavernous 
basilar plexus

Question 19

intro to cavernous sinus

Answer 19

in middle cranial fossa on each side of sphenoid bone
anteriorly superior orbital fussre
post apex of petrous temporal bone

Question 20

cavernous sinus relations outside the strcuture

Answer 20

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

Question 21

structures with in the lateral wall of cvernous sinus

Answer 21

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

Question 22

structures with in the medial wall of cvernous sinus

Answer 22

internal carotid

abducent nerve

Question 23

incoming channels into the cavernous sinus from orbit and brain

Answer 23

superior and inferior opthalmic veins

superficial middle cerebral vein and inferior cerebral vein

Question 24

incoming channels into cavernous sinus from meninges

Answer 24

spheno parietal
middle meningeal vein either drain into pterygoid plexus through foramen ovale or into the spehnopalatine or cavernous sinus

Question 25

draning channels of cavernous sinius

Answer 25

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

Question 26

how right and left cavernous sinus communicate

Answer 26

through ant and post intercavernous sinus

Question 27

tributaries of transverse sinus

Answer 27

superior petrosal
inferor cerebral
inf cerebellar 
diploic 
inferior anastomotic vein

Question 28

tributaries of sigmoid sinus

Answer 28

mastoid and condylar emissary veins
internal auditory vein
cerebellar bein