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arachnoid granulations |
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arachnoid granulations, clumps of arachnoid villi that project into the superior sagittal sinus. arachnoid 1. resembling a spider's web. 2. the delicate membrane interposed between the dura mater and the pia mater, and with them constituting the meninges. Called also arachnoidea. cerebral arachnoid, arachnoidea cerebri the arachnoid investing the brain. arachnoid cyst cysts of the pia and arachnoid containing cerebrospinal fluid; may cause gradually increasing pressure on nervous tissue, especially spinal cord, causing ataxia, paresis. arachnoid fibroblastoma see meningioma. arachnoid granulations villous enlargements of the arachnoid that protrude into dural sinuses or diploic veins and serve to drain cerebrospinal fluid. They are conspicuous in the dorsal sagittal sinus of the horse. arachnoid membrane arachnoid; middle layer of the meninges. spinal arachnoid the arachnoid investing the spinal cord. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Spontaneous CSF temporal bone leakage might occur as a result of an encephalocele or secondary to the development of arachnoid granulations along the tegmen of the middle ear or mastoid. [16] Gacek concluded that herniation of aberrant arachnoid granulations over the middle and posterior fossa might be responsible. |
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