Venous drainage of brain
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Transcript of Venous drainage of brain
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VENOUS DRAINAGE OF CEREBRUM
Dr. Rati TandonJ.N.M.C.,AMU,
ALIGARH
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Veins of brain intracranial dural venous sinusesinternl jugular veins of neck.
The route of blood within the head
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Characterstic features of venous drainage of brain :
- Does not have arterial pattern.- Extremely thin walled (absence of
muscular tissue in walls).- No valves.- Run in subarachnoid space.
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MichiganNeurosurger
y
Veins of the Head and Neck
Scalp/Emissaryveins
Facialveins
Neckveins
Brain and meningealveins
Diploicveins
Meningealveins
Dural sinuses
Cerebralveins
Superficial Deep
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MichiganNeurosurger
y
Cerebral veins
Superficial veins
Deep veins
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Superficialor
External cerebral veins
Drain the surface (cortex) of cerebral hemisphere:
3 groups:1. Superior cerebral veins2. Middle cerebral veins3. Inferior cerebral veins.
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Superior cerebral veins
- 8 to 12 in number- Drain- Superolateral and Medial surface- Ascends upwardsArachnoidmater Subdural space Superior saggital sinus.
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MIDDLE CEREBRAL VEINS
Four in number : 2 on each side
- Superficial middle cerebral vein- Deep middle cerebral vein
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Superficial middle cerebral vein :- Lies superficially in lateral sulcus.
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- Anteriorly, drains into cavernous sinus.
- Posteriorly, communicates with Superior saggital sinus through superior anastomotic vein (of Troland).
- With Transverse sinus via inferior anastomotic vein of Labbe.
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DEEP MIDDLE CEREBRAL VEIN
Lies deep in lateral sulcus.
Joins anterior cerebral vein to form the basal vein.
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INFERIOR CEREBRAL VEINS Drains :
- Inferior surface,- Lower parts of medial and superolateral
surfaces.
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Other veins Anterior cerebral vein:
- Accompanies anterior cerebral artery.- Drains medial surface.
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Basal vein of Rosenthal:
- Formed at base of brain
- By union of three veins:
Anterior cerebral vein
Deep middle cerebral vein
Striate vein
Basal vein terminate into Great cerebral vein of Galen
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INTERNAL CEREBRAL VEINS
Each internal cerebral vein is formed at interventricular foramen of Monro.
Union of three veins:- Thalamostriate vein
(thalamus and basal ganglia)
- Septal vein (septum pellucidum)
- Choroidal vein (choroid plexus).
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Two internal cerebral veins joins to form Great cerebral vein of Galen Straight sinus.
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Great cerebral vein of Galen
Length 2cm Union of 2 internal cerebral vein Receives two basal veins too. Joins inferior saggital sinus. Drains into straight sinus.
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Tributaries:
- Internal cerebral V- Basal V- Veins from colliculi- Veins from cerebellum.
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Venous drainage according to surfaces
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Superolateral surface Upper part
Superior cerebral veins SSS.
Lower part Inferior cerebral veinssuperficial middle cerebral vein.
Posteroinferior part Transverse sinus.
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Inferior surface Orbital part inferior
cerebral V superficial middle cerebral V and Anterior cerebral V.
Tentorial part:- to venous sinuses
(cavernous,superior petrosal, straight and transverse sinus.
- Superficial middle cerebral veincavernous sinus
- Basal vein straight sinus
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Medial surface Upper
partsuperior cerebral V superior saggital sinus.
Lower partinferior cerebralinferior saggital sinus
Posterior part great cerebral vein
Anterior part anterior cerebral vein.
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Applied anatomy Subdural haemmorhage: - rupture of cerebral veins in subdural
space.
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THANK YOU
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MichiganNeurosurger
y
Deep VeinsThalamostriate vein Septal vein
Internal Cerebral vein (2)
Basal vein ofRosenthal (2)
Occipital vein (2)
PosteriorPericallosal
vein (2)Mesencephalic
vein (2)PrecentralCerebellar
vein (1)
Vein of Galen Inferior Sagittal Sinus
Straight Sinus