Dural sinuses

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Dural sinuses of skull and brain, structure, clinical importanc3e

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  • Dural sinuses

    1. 1. Pronograde Quadruped - vertebrate Orthograde – plantigrade Biped – erect - vertebrate
    2. 2. Splanchnocranium Neurocranium Telencephalisation Inversely proportional
    3. 3. Blood supply of brain Venous drainage of brain Brain – Internal carotid - Vertebral art. - Choroid plexus Skull – Mid.Meningeal art. (Foramen spinosum) Br. of 1st part Max.art. (Ext. Carotid art.) Brain – Ext.cerebral veins - Ineter. cerebral veins - Terminal veins - Great cerebral vein (Union of 2 int.cereb.veins) - Basal veins (Drain into Grt.Cereb.vein) Skull - Diploic veins - Emissary veins Ventricles - CSF Ultimately drain into Venous sinuses Internal Jugular Vein
    4. 4. Skull bones coverings Scalp Diploe Pericranium Dura
    5. 5. Skull bones coverings Diploe Endocranium + Dura Outer table Inner table Arachnoid Piamater
    6. 6. Emissary vein Dipoeic vein Cerebral vein CSF through Archnoid granulation Sup.Sag. Sinus
    7. 7. Diploic veins Posterior temporal Occipital Anterior temporal Frontal
    8. 8. Dural Lacnua Dural Veins Sup.Sag.Sinus
    9. 9. Sup. Cerebral veins Sup. Middle Cerebral vein Sup. Anastomotic vein Inf. Cerebral veins Transverse sinus Sigmoid sinus
    10. 10. ARTERIAL SUPPLY OF SKULL BONES Middle Mewningeal art. Through Foramen Spinosum (Br. of 1st part of Maxillary art.) From Ext. Carotid
    11. 11. Norma Frontalis
    12. 12. Norma Lateralis
    13. 13. Norma Basalis
    14. 14. Skull Sagittal section
    15. 15. Dural venous sinuses Unpaired 1. Superior sagittal 2. Inferior sagittal 3. Striaght 4. Occipital 5. Ant. Intercavernous 6. Post.Intercavernous 7. Basilar venous plexus Paired 1. Transverse 2. Sigmoid 3. Cavernous 4. Sup. Petrosal 5. Inf. Petrosal 6. Sphenoparietal 7. Petrosquamous 8. Middle meningeal
    16. 16. Sphenoparietal Cavernous Ant. intercavernous Sup. petrosal Inf. petrosal Transverse Sigmoid Occipital
    17. 17. Superior sagittal sinus Tributaries – Sup. Cerebral veins - Diploic & Emissary veins through lacunae Communications - Veins of scalp thro’ emissary veins - Vein from nose thro’ foramen caecum (rare) - Cavernous sinus thro’ sup. anastomotic vein Applied anatomy - Infection from nose, scalp, diploic tissue leads to thrombosis of sup/sag. Sinus - Defective absorption of CSF - increased intracranial tension
    18. 18. Falx. Cerebri Falx. Cerebelli Great Cerebral Vein Sup. Sag.Sinus Inf. Sag.Sinus
    19. 19. Sup.sag.sinus Cerebral fossa Transverse sinus Straight sinus Falx cerebri Falx cerebellii Cerebellar fossa Coron. Section at Foramen magnum
    20. 20. Wall of groove for Sigmoid sinus Mastoid antrum Facial n.

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