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Cranial Cavity

Cranial Cavity. R. Shane Tubbs, MS, PA-C, Ph.D. Anterior Cranial Fossa. Middle Cranial Fossa. Posterior Cranial Fossa. CRANIAL FOSSAE. Bones. Frontal. Anterior. Ethmoid. Sphenoid. Middle. Temporal. Parietal. Posterior. Occipital. CN I. CN III CN IV CN V 1 CN VI. CN II.

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Cranial Cavity

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  1. Cranial Cavity R. Shane Tubbs, MS, PA-C, Ph.D.

  2. Anterior Cranial Fossa Middle Cranial Fossa Posterior Cranial Fossa

  3. CRANIAL FOSSAE Bones Frontal Anterior Ethmoid Sphenoid Middle Temporal Parietal Posterior Occipital

  4. CN I CN III CN IV CN V1 CN VI CN II CN V2 CN V3 CN VII CN VIII CN IX CN X CN XI CN XII

  5. Diploic Extracranial Cerebral Emissary Dural Venous Sinus

  6. emissary v. diploic veins

  7. Tentorium cerebelli Falx Cerebri

  8. incisura

  9. Cranial Venous Sinuses

  10. DURAL VENOUS SINUSES

  11. Superior Sagittal Sinus Sphenoparietal Cavernous Basilar Superior Petrosal Sigmoid Transverse Straight Confluence Tentorium Cerebelli

  12. Dural Sinuses Superior Sagittal Inferior Sagittal Great Cerebral Straight Sup/Inf Petrosal Confluence Occipital Transverse Sigmoid Falx Cerebri

  13. Pituitary Gland CN III CN IV Internal Carotid CN VI CN V1 ?CN V2 CAVERNOUS SINUS & CONTENTS

  14. Cavernous sinus Superior ophthalmic vein Angular vein Inferior ophthalmic vein Pterygoid venous plexus Facial vein Maxillary vein Deep facial vein Retromandibular vein

  15. Connections of facial vein • Directly to cavernous sinus by superior ophthalmic vein or inferior ophthalmic vein • Indirectly by pterygoid venous plexus by inferior ophthalmic vein or deep facial vein

  16. Danger triangle of face Normally blood drains from medial angle of the eye, nose and lips – into facial vein Because facial veins don’t have valves blood can drain into cavernous sinus.

  17. Cerebral Blood Supply

  18. Anterior Communicating Anterior Cerebral Middle Cerebral Posterior Communicating Posterior Cerebral Basilar Vertebral Cerebral Arterial Circle (of Willis) Internal Carotids

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