What are basilar cisterns?
The subarachnoid cisterns, or basal cisterns, are compartments within the subarachnoid space where the pia mater and arachnoid membrane are not in close approximation and cerebrospinal fluid (CSF) forms pools or cisterns (Latin: “box”). As they are interconnected, their patency is essential for CSF circulation.
What is Sylvian cistern?
The Sylvian cistern, also known as the insular cistern, is the deep (cisternal) part of the Sylvian fissure, which may be considered one of the CSF-filled subarachnoid cisterns.
What are Perimesencephalic cisterns?
The perimesencephalic cisterns include the interpeduncular, crural, ambient, and quadrigeminal cisterns surrounding the midbrain. The interpeduncular cistern lies between the cerebral peduncles. The crural cistern lies between the posterior segment of the uncus and the cerebral peduncle.
What are the cisterns in the brain?
The subarachnoid cisterns are spaces formed by openings in the subarachnoid space, an anatomic space in the meninges of the brain. The space is situated between the two meninges, the arachnoid mater and the pia mater. These cisterns are filled with cerebrospinal fluid.
What is effacement of basal cisterns?
Effacement of the basal cisterns As well as causing mass effect from one side to the other, an intracranial lesion may cause mass effect downwards into the posterior fossa. This may manifest as effacement of the basal cisterns.
How do cisterns work?
Roof-catchment cisterns are systems used to collect and store rainwater for household and other uses. A system of gutters and downspouts directs the rainwater collected by the roof to the storage cistern.
Where is the Prepontine cistern?
The prepontine cistern, or simply pontine cistern, is an unpaired CSF-filled subarachnoid cistern located ventral to the pons and dorsal to the clivus. It is bounded by arachnoid membranes which separate it from surrounding cisterns.
What does Perimesencephalic mean?
Perimesencephalic subarachnoid hemorrhage (PMSAH) is a distinct pattern of subarachnoid hemorrhage (SAH), which is centered on the basal cisterns around the midbrain.
What is in the lumbar cistern?
Lumbar cistern The space inside the arachnoid mater is filled with cerebrospinal fluid (CSF). Below the conus medullaris, this space is enlarged. This enlargement is called the lumbar cistern and contains CSF, the filum terminale, and the cauda equina.