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The subarachnoid cisterns are spaces formed by openings in the subarachnoid space, an anatomic space in the meninges of the brain. [1] The space is situated between the two meninges , the arachnoid mater and the pia mater .
The interpeduncular cistern (or basal cistern [1]) is the subarachnoid cistern situated between the dorsum sellae (anteriorly) [2] and the two cerebral peduncles [1] [3] [2] at the front of the midbrain. [3] Its roof is represented by the floor of the third ventricle (i.e. posterior perforated substance, and the two mammillary bodies).
The cistern is situated superior to the optic chiasm, and inferior to the rostrum of corpus callosum. [3] The cistern is an extension of [1] /communicates inferiorly with the interpeduncular cistern. [2] The cistern of lamina terminalis connects the chiasmatic cistern with the pericallosal cistern. [4]
The cisterna magna (posterior cerebellomedullary cistern, [1] or cerebellomedullary cistern [2] [3]) is the largest of the subarachnoid cisterns.It occupies the space created by the angle between the caudal/inferior surface of the cerebellum, and the dorsal/posterior surface of the medulla oblongata (it is created by the arachnoidea that bridges this angle [3]).
The angle formed in turn creates a subarachnoid cistern, the cerebellopontine angle cistern. The pia mater follows the outline of the fissure and the arachnoid mater continues across the divide so that the subarachnoid space is dilated at this area, forming the cerebellopontine angle cistern. [citation needed]
The lumbar cistern is part of the subarachnoid space.It is the space within the thecal sac which extends from below the end of the spinal cord (the conus medularis), typically at the level of the first to second lumbar vertebrae down to tapering of the dura at the level of the second sacral vertebra.
The cistern of lateral cerebral fossa [1] (also cistern of the lateral sulcus, or Sylvian cistern [2]) is an elongated [3] subarachnoid cistern formed by arachnoid mater bridging the lateral sulcus between the frontal, temporal, and parietal opercula.
The prepontine cistern, or pontine cistern is one of the subarachnoid cisterns situated ventral to the pons. [1] It contains the basilar artery . [ 2 ] : 478 Each lateral aperture opens into the pontine cistern just posterior to the cranial nerve VIII .