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31 Cards in this Set
- Front
- Back
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List the layers of meninges |
Dura matter/ pachymeninx Arachnoid matter Pia matter |
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What is the origin of the dura matter |
Mesoderm |
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What is the origin of arachnoid and pia matter and what are they called collectively |
Neural crest cells and leptomeninges |
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Space BTW cranial bone and dura is called |
Extradural space |
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Space between dura and arachnoid is called |
Subarachnoid space |
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Space BTW pia matter and brain is called |
Sub pial space |
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Space outside the spinal dura is called |
Epidural space |
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Layers of dura matter |
Outer endosteal dura Inner meningeal dura |
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The space between endosteal and meningeal layer that is filled with venous blood is called |
Dural venous sinus |
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Folds of dura matter |
Falx cerebri Tentorium cerebelli Falx cerebelli Diaphragma sellae |
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Shape and location of flax cerebri |
Sickled shape and present in median longitudinal fissure of cerebrum |
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Attachment of flax cerebri |
Upper convex border- in front of frontal crest Middle of the lip- superior sagittal sulcus Posterior end- internal occipital protuberance |
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Venous sinus in relation to falx cerebri |
Superior sagittal sinus Inferior sagittal sinus Straight sagittal sinus Confluence of venous sinus ( torucular herophili) |
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Shape, location and function of tentorium cerebelli |
Semilunar shaped fold which forms a roof over the cerebellum in posterior cranial fossa and it separates cerebellum from the inferior surface of occipital lobe |
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The anterior free end of tentorium cerebelli forms a u- shaped gap called |
Tentorial notch |
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Significance of tentorial notch is |
It is a space where the midbrain is found and connect with the fore and hind brain |
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Venous drainage associated with tentorium cerebelli |
Rt and left transverse sinus Superior petrosal sinus Straight sinus Confluence of venous sinuses at posterior midline |
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Description of flax cerebelli |
Small sickle shaped dural fold present in the posterior cerebellar notch between the two cerebellar hemisphere |
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Venous sinus associated with falx cerebelli |
Occipital sinus Confluence of sinuses at the base |
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Describe diaphragma sellae |
Quadrangular sheet of dura matter which stretches across the sella turnica |
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Venous sinus associated with diaphragma sella |
Anterior and posterior intercavenous sinus |
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Nerve supply of dura matter |
Dura matter of anterior cranial fossa- ophthalmic division of trigeminal nerve Dura of middle cranial fossa is branch of maxillary and mandibular division of trigeminal nerve Dura matter of posterior cranial fossa is upper 3 cervical nerve in infratentorial part |
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Arterial supply of dura matter |
Based on location: Anterior cranial fossa is meningeal branch of ophthalmic artery Middle cranial fossa is middle meningeal artery Posterior cranial fossa is meningeal branch of ascending pharyngeal artery |
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What are emissary veins |
They connect venous sinus to extracranial vein |
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Modification of arachnoid membrane around dura sinus is |
Arachnoid villi |
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Group of arachnoid villi is called |
arachnoid granulation |
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What percentage of CSF drain into superior sagittal sinus |
75% |
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Areas where sub arachnoid space exist and CSF pools is called |
Sub arachnoid cisterns |
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Example of sub arachnoid cisterns |
Interpeduncular Pontine/ basilar Lumbar Cisterna magna Sylvian |
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What causes subdural hematoma |
Tearing of cerebral vein or dural venous sinus |
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Cause of extradural hematoma |
Rupture of middle meningeal artery |
