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عمومی::
عنکبوتیه
ACA, anterior cerebral artery; MCA, middle cerebral artery; PCA, posterior cerebral artery; PAD, pia, arachnoid, dura.
The arachnoid lies between the pia arachnoid-like, like a gossamer spider web, and avascular.
Once outside the brain stem, the CSF enters the subarachnoid space (the space between the arachnoid and pia) and exits into the superior sagittal sinus via specialized structures in the sinus wall called arachnoid villi.
2-4 In the region of the lumbar cistern, which membrane is in closest apposition to the arachnoid membrane - the dura or pia?
The lumbar cistern is a large subarachnoid space and the arachnoid is next to the dura.
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