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A-CNS Anatomy > cranial cavity 1 > Flashcards

cranial cavity 1 Flashcards

1
Q

بسم الله الرحمن الرحيم وبه نستعين
Cranial caity is divedid into ?

A

Anterior middle posterior cRANIAL fossae

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2
Q

…..separates the Ant from middle cranial fossa ?

A

Lesser wing of sphenoid

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3
Q

….Separates the middle from inferior cranial fossae ?

A

Petros part ot temporal bone

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4
Q

Pituitary fossa is,,,,,,,,,,, involve,,,,,,, ?

A

Shpenoid body for Pituitary gland

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5
Q

Foramen magnum is passed by ?

A

Brainstem

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6
Q

Mention meningeal membranes

A

Dura
Arachanoid
pia

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7
Q

Describe pia

A

Meningieal memberane
Thin delicate investing brain and follwoing its Contour by entering Fissures and grooves

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8
Q

describe arachanoid

A

Thin avascular
from its inner surface subarahcnoid extensions projects to the pia

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9
Q

Describe Dura

A

Thick Outer meninigel membrane formed of 2 layers
Outerendosteal + inner memengial
They are fused together excpet for areas for forming
Dural Folds + Dural Venous Sinuses

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10
Q

spaces in meninges

A

Sub-dural between dural and Arachanoid
Sub Arachanoid between Arachanoid and pia

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11
Q

Mention Dural folds

A

Falx cerebri +cerebelli
Tentorium Cerebelli
Diapharamatic sellae

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12
Q

Describe dural folds in general

A

Partition like processes separating parts of brain and Stabilizing them during movment
Formed by duplication of Meningal dural fold

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13
Q

Covers Pituitary by covering Shpenoid body ?

A

Diapharagmgatic sellae

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14
Q

Describe falx cerebri

A

Cresntric
Vertical downwards
between 2 cereberal hemispheres in medial longitudinal fissure till corpus callosum
Apex Conncted to :
1-Frontal Crest
2-Crista galle
Base to ? Tentorium cerebelli

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15
Q

Falx cerebri boundaries

A

apex to frontal crest +crista galle
base to tentorium cerebelli
Upper margin to supperio sagital sinus margins
lower margin free
Right and lateral sufraces

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16
Q

Falx cerebri is connected to ? under surface of skull cap ?

A

Margins of superior sagital sinus

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17
Q

Mention sinuses enclosed by margins of falx cerebri

A

Upper margins Superior sagital sinus
Lower margin Inferior sagital sinus
Base Straight sinus

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18
Q

Free margin of tentorium cerebelli is fixated by ?

A

Anterior clenoid processes making ?
sphenio tentorial notch

19
Q

Attached margin of tentorium cerebelli is attached to ?>

A

Posterior Clenoid processes
upper part of petrous bone
lips of transverse Sinus

20
Q

Describe falx cerebelli …. .

A

Posterior cranial fossa
Crescntric
vertical downwards
between 2 cerebellar hemispheres
Boundaries :
Base to Tentorium Cereblli
apex to margins of Foramen Magnum
Rt and Lt surfaces to? Cerebellum
Anterior free
Posterior : Internal Occipital Crest

21
Q

Point of Crossing ? what is it

A

Point of Crossing of attached and free margins of Tentorium Cerebelli
The Occlumotor pass anterior to it
The Trochlear Corss it !

22
Q

Venous sinuses Related to tentorium Cerebelli Mention

A

Superior Petrosal
Transverse
Straight sinuses

23
Q

Describe Tentorium Cerebelli

A

Posterior Cranial Fossa
Horizontal Tent
Between Cerebral and Cerebellar Hemispheres

24
Q

Clenoid process give attachment to ?

A

Tentorium cerebellI
Diapharagmtic sellae

25
Q

Describe Diapharagmatic sellae

A

Small dural fold
Between 4 Clenoid Processes
covering Hypophyseal fossa and has central opening for ?
Infinibulum of Pituitary gland

26
Q

Blood supply to dural folds

A

Anterior Fossa:
Opthalmic + Middle Menigneal
Middle Fossa:
Middle+ Accessory Meningeal
Posterior Fossa ?
Occipital +Ascending Pharyngeal + Vertebral

27
Q

Nerve supply to Dural Folds ?

A

3 branches of trigeminal + 3 upper cervical
Anterior Fossa :
Anterior ethmoidal + Maxillary
Middle Fossa:
Maxillary + Mandibular
Posterior Fossa ?
c1+C2+C3
CN10+12

28
Q

Dural venous sinuses show

A

Venous channels lined by endothelium between 2 dural layers with no muscles or valves
Draining Brain Meninges CSF bones

29
Q

Connecting IntraCranial with ExtraCrania lis ?

A

Emissary veins

30
Q

Mention dural venous

A

Paired:
Sphenopariteal
Cavernous
Superior petrosal transvers
inferior petrosal sigmoid
____________________
Single :
Superior Sagittal sinus
inferior sagittal sinus
Occipital -Straigth sinisuse
____________________
multiple :
IntraCavernous sinuses
Basiilar pleux

31
Q

Occipital sinus found at area of ?

A

Internal occipital Crest

32
Q

نهاية sss
ISS

A

At right : SSS to right transves to Right sigmoid to Right IJV
At left : ISS to straight sinus to left transverse to left sigmoid to Left IJV

33
Q

Cavernous sinus drains into ?

A

-Superior petrosal to transvers …
- Inferior Petrosal to sigmoid ….

34
Q

Confluence of sinus at?
Involving ?

A

At internal occipital protuberance
Superior sagittal sinus
Straight
Occipital
Transverse

35
Q

Cavernous sinus describe

A

Spongy sinus in middle cranial fossa
On either side of Body of SHpenoid (pituitary fossa )
ant : medial end of orbital fissue
post: apex of petrous temporal

36
Q

Relations of Cavernous sinus

A

Superior :
Optic Tract + Internal carotid artery
Inferior : foramne lacerum
Medially: Pituitary + Shpenoidal Air sinus
Lateral : Temporal + Trigimenal
__________________aant : sup oribtal fissure and apex of orbit
post : apex of petrous temporal + Crus cerebri of mid brain

37
Q

Structures runinig in medial and lateral wall of cavernous sinus ?

A

Lateral “:
Occlumotor + Trochlear
Opthalamic + Maxillary
___________________
Medial :
Internal carotid artery and infrolatral to it is ? Abducent nerve

38
Q

Tribuitaries of Cavernous Sinus are?

A

Superior opthalmic vein
Spheniopariteal vein 2S
Frontal MMV middle meningeal
Cerebral veins :- superfical-middle-inferior cerebral veins
Veins from pituitary gland

39
Q

Cavernous sinus drains into ?

A

Superior petrosal to Transvers
inferior petrosal to Sigmoid

40
Q

Communiations of Cavernous sinus ?

A

-SOV
-Pterygoid venous pleux via emissary veins
-intracavernous sinuses
Bidirectional cmmounictions no valve

41
Q

clincal imp of Cavernous sinus >?

A

Infection spreads to it via dangerous area of face
affecting 346 cranial nerves
may cause chemosis or abducent palsy

42
Q

الحمدلله رب العالمين

A
43
Q

dilated posterior end oF SSS is called

A

Confluence of Siueses

44
Q

Tribuitaries of SSS ?

A

superior cerebral veins
Arahnoi villi and granulations into sinus and 3 lacunae dilatations on each side

A-CNS Anatomy (27 decks)

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