arachnoid(redirected from arachnoid membranes)
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See also: leptomeninx.
(1) Spider-like in appearance
(2) Cobweb-like; covered with or consisting of entangled soft fibres or hair-like material.
noun A member of the arachnid family.
arachnoidadjective Like a cobweb, covered with or consisting of entangled soft fibers or hair-like material noun A member of the arachnoid family
a·rach·noid mat·er(ă-rak'noyd mā'tĕr) [TA]
Synonym(s): arachnoidea mater [TA] , arachnoid membrane, arachnoidea, arachnoides.
arachnoidThe delicate middle layer of the three MENINGES covering the spinal cord and brain, lying between the pia mater and dura mater. Unlike the pia mater, the arachnoid bridges over the grooves (sulci) on the surface of the brain and covers many large blood vessels lying in the sulci. Bleeding from any of these vessels causes a subarachnoid haemorrhage. From the Greek arachne , a spider.
Patient discussion about arachnoid
Q. What is the treatment for an arachnoid cyst? My 15 year old son has just been diagnosed with an arachnoid cyst. What is the treatment? Is an operation necessary?
Q. info on arachnoid cyst in the right posterior fossa
It's usually congenital (i.e. develops during pregnancy), and even when it cause symptoms they develop slowly.
YOu can read more here (http://en.wikipedia.org/wiki/Arachnoid_cyst)
Q. Is there any problem, if an arachnoid cyst ,2cmx1.5cm size, rostral to cerebellar region left untreated? symptoms: repeated headaches, twitching of muscles, tiredness