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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