Protrusions of the arachnoid mater for returning cerebrospinal fluid to circulation
Arachnoid granulation
Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc. ("Arachnoid granulation" label is at top right.)
Arachnoid granulations seen on autopsy, where the dura mater has been removed but the arachnoid mater is left in place.
Details
Identifiers
Latin
granulationes arachnoideae
TA98
A14.1.01.205
TA2
5389
FMA
77760
Anatomical terminology
[edit on Wikidata]
Arachnoid granulations (also arachnoid villi, and pacchionian granulations or bodies) are small protrusions of the arachnoid mater (the thin second layer covering the brain) into the outer membrane of the dura mater (the thick outer layer). They protrude into the dural venous sinuses of the brain, and allow cerebrospinal fluid (CSF) to exit the subarachnoid space and enter the blood stream.
The largest granulations lie along the superior sagittal sinus, a large venous space running from front to back along the center of the head (on the inside of the skull). They are, however, present along other dural sinuses as well.
and 24 Related for: Arachnoid granulation information
Arachnoidgranulations (also arachnoid villi, and pacchionian granulations or bodies) are small protrusions of the arachnoid mater (the thin second layer...
Arachnoid (botany), referring to organs with a cobwebby exterior appearance Arachnoidgranulation, small protrusions of the arachnoid mater Arachnoid...
The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because...
choroid plexus of the ventricles of the brain, and absorbed in the arachnoidgranulations. In humans, there is about 125 mL of CSF at any one time, and about...
to the confluence of sinuses. Cerebrospinal fluid drains through arachnoidgranulations into the superior sagittal sinus and is returned to venous circulation...
layer of the brain, the dura mater. Pacchioni's granulations (or Pacchionian bodies), where the arachnoid layer protrudes through the dura, are named after...
hypertension (raised venous pressure), decreased CSF resorption via arachnoidgranulation and further rise in ICP. The diagnosis may be suspected on the basis...
and cerebrospinal fluid (CSF) from the subarachnoid space via arachnoidgranulations. They mainly empty into the internal jugular vein. Cranial venous...
by the arachnoid villi.[citation needed] The fluid then flows around the superior sagittal sinus to be reabsorbed via the arachnoidgranulations (or arachnoid...
and ending its cycle in the venous blood via structures like the arachnoidgranulations. The pia spans every surface crevice of the brain other than the...
depressions, best marked in the skulls of old persons, for the arachnoidgranulations (Pacchionian bodies). In the groove is the internal opening of the...
functional impairment of the arachnoidal granulations (also called arachnoidgranulations or Pacchioni's granulations), which are located along the superior...
to pass through the brain's lymphatic system and be absorbed by arachnoidgranulations. CSF is a clear fluid that surrounds the brain and spinal cord....
system via the arachnoidgranulations which run along the superior aspect of the cerebral hemispheres ... correspond to the arachnoid villi, finger-like...
before being reabsorbed into the circulation (predominantly by the arachnoidgranulations). The cerebrospinal fluid can be accessed most safely in the lumbar...
conditions are thought to lead to increased inflammation of the arachnoidgranulations, which further leads to decreased CSF reabsorption and therefore...
surrounding the brain, then draining into the systemic blood column via arachnoidgranulations of the dural sinuses or to peripheral lymphatics along cranial nerve...
cribriform plate and into the lymphatics of the nasal mucosa, and arachnoidgranulations to clear itself of excess protein, fluid, and metabolic waste products...
blood clot may generate an inflammatory response that damages the arachnoidgranulations, inhibiting the regular reabsorption of CSF and resulting in permanent...
cranial venous hypertension, which decreases CSF resorption from the arachnoidgranulations, leading to intracranial hypertension and papilledema. The venous...
on either side of the sagittal sulcus, for the reception of the arachnoidgranulations. This article incorporates text in the public domain from page 135...
tearing of the bridging veins in the subdural space between the dura and arachnoid mater. It can cross the suture lines, but not across dural reflections...
Acharius in 1803. appressed Lying flat; flattened down on a surface. arachnoid Also araneose, araneous. Having a cobweb-like form, like that of the irregularly...
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