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R. Shane Tubbs, MS, PA-C, Ph.D.
Cranial Cavity R. Shane Tubbs, MS, PA-C, Ph.D.
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Posterior Cranial Fossa
Anterior Cranial Fossa Middle Cranial Fossa Posterior Cranial Fossa
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Bones Frontal Ethmoid Sphenoid Temporal Parietal Occipital CRANIAL FOSSAE Anterior Middle Posterior
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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
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Diploic Extracranial Cerebral Emissary Dural Venous Sinus
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emissary v. diploic veins
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Falx Cerebri Tentorium cerebelli
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incisura
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Cranial Venous Sinuses
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DURAL VENOUS SINUSES
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Superior Sagittal Sinus
Sphenoparietal Cavernous Basilar Superior Petrosal Sigmoid Tentorium Cerebelli Straight Transverse Confluence
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Falx Cerebri Superior Sagittal Inferior Sagittal Great Cerebral
Dural Sinuses Superior Sagittal Inferior Sagittal Great Cerebral Falx Cerebri Straight Sup/Inf Petrosal Confluence Transverse Sigmoid Occipital
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CAVERNOUS SINUS & CONTENTS
Pituitary Gland CN III CN IV Internal Carotid CN VI CN V1 ?CN V2
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Superior ophthalmic vein
Cavernous sinus Superior ophthalmic vein Angular vein Inferior ophthalmic vein Pterygoid venous plexus Facial vein Maxillary vein Deep facial vein Retromandibular vein
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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
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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.
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Cerebral Blood Supply
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Cerebral Arterial Circle (of Willis)
Anterior Communicating Anterior Cerebral Internal Carotids Middle Cerebral Posterior Communicating Posterior Cerebral Basilar Vertebral
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