Cerebral Dura

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    By

    Odutayo Oluwasegun

    10/46KA057

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    Introduction

    Types of membrane

    Location

    Structure

    Blood supply

    Venous drainage

    Nerve fibres

    Applied anatomy

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    Showing THE

    sellardiaphragm

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    endosteal layerceases at the

    foramenmagnum, itsplace being takenby the

    periosteum liningthe vertebralcanal

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    Pia Mater

    It is the meningealenvelope that firmlyadheres to the surface ofthe brain and the spinalcord.it is composed of

    fibrous tissue and itsouter surface is coveredby flat cells

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    Arachnoid mater

    it is separated by thesubarachnoidspace.it does not linethe brain into the

    sulci.the arachnoid& dura mater lieclose togetherthroughout the

    cranium but laterfuse into one layer atlevel of S2

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    subarachnoid

    space

    It is the spacebetween thearachnoidmembrane and the

    pia mater.it isoccupied by spongytissue

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    Dura folds &

    reflection

    1)Tentorium cerebelli

    :separates the cerebellum &and the brainstem from theoccipital lobe of thecerebrum

    2)Falx cerebri : seperatesthe two hemispheres of the

    brain3)Falx cerebelli : partiallyseperates the cerebralhemisphere

    4)Sellar diaphragm :smallest dura infolding.itcovers the pituitary glandat the hypophysial fossa

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    Venous Drainage

    Name Drains to

    Inferior sagittal sinus Straight sinus

    Superior sagittal sinus

    Typically becomesright transversesinus or confluenceof sinuses

    Superior petrosalsinus

    transverse sinuses

    Occipital sinusConfluence ofsinuses

    Confluence of sinuses Right and Lefttransverse sinuses

    Transverse sinuses Sigmoid sinuses

    Cavernous sinusesSuperior andinferior petrosal

    sinuses

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    Blood Supply

    .

    A. posterior meningealartery (from the ascendingpharyngeal artery throughthe jugular foramen)B. meningeal arteries

    (from the ascendingpharyngeal artery throughhypoglossal canal)C. meningeal arteries(from occipital arterythrough jugular or

    mastoid foramen)D. meningeal arteries(from vertebral arterythrough foramenmagnum)

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    Dural ectasia is the enlargement of the dura and iscommon in connective tissue disorders.

    Spontaneous cerebrospinal fluid leak is the fluid andpressure loss of spinal fluid due to holes in the dura

    mater.

    Cerebral venous sinus thrombosis:this occurs as aresult of blood clot formation on the blood vessel

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    abmedterms.com

    D. Harper

    Shepherd S. 2004. "Head Trauma."

    JumpVinas FC and Pilitsis J. 2004. "Penetrating Head Trauma.Bousser MG. Cerebral venous thrombosis

    Kalbag R, Woolf A. Cerebral venous thrombosis

    http://en.wikipedia.org/wiki/Dura_materhttp://en.wikipedia.org/wiki/Dura_materhttp://en.wikipedia.org/wiki/Dura_materhttp://en.wikipedia.org/wiki/Dura_mater