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  2. Fourth ventricle - Wikipedia

    en.wikipedia.org/wiki/Fourth_ventricle

    Fourth ventricle location shown in red (E), pons (B); the floor of the ventricle is to the right, the roof to the left. The fourth ventricle has a roof at its upper (posterior) surface and a floor at its lower (anterior) surface, and side walls formed by the cerebellar peduncles (nerve bundles joining the structure on the posterior side of the ventricle to the structures on the anterior side).

  3. Ventricular system - Wikipedia

    en.wikipedia.org/wiki/Ventricular_system

    CSF flows from the lateral ventricles via the interventricular foramina into the third ventricle, and then the fourth ventricle via the cerebral aqueduct in the midbrain. From the fourth ventricle it can pass into the central canal of the spinal cord or into the subarachnoid cisterns via three small foramina: the central median aperture and the ...

  4. Third ventricle - Wikipedia

    en.wikipedia.org/wiki/Third_ventricle

    The third ventricle is one of the four connected cerebral ventricles of the ventricular system within the mammalian brain. It is a slit-like cavity formed in the diencephalon between the two thalami , in the midline between the right and left lateral ventricles , and is filled with cerebrospinal fluid (CSF).

  5. Aqueductal stenosis - Wikipedia

    en.wikipedia.org/wiki/Aqueductal_stenosis

    The aqueduct of Sylvius is the channel which connects the third ventricle to the fourth ventricle and is the narrowest part of the CSF pathway with a mean cross-sectional area of 0.5 mm 2 in children and 0.8 mm 2 in adults. [3] Because of its small size, the aqueduct is the most likely place for a blockage of CSF in the ventricular system.

  6. Median aperture - Wikipedia

    en.wikipedia.org/wiki/Median_aperture

    The median aperture (median aperture of fourth ventricle or foramen of Magendie) is an opening at the caudal portion of the roof of the fourth ventricle. [1] It allows the flow of cerebrospinal fluid (CSF) from the fourth ventricle into the cisterna magna. [2] [3] The other openings of the fourth ventricle are the lateral apertures - one on ...

  7. Circumventricular organs - Wikipedia

    en.wikipedia.org/wiki/Circumventricular_organs

    The circumventricular organs are midline structures around the third and fourth ventricles that are in contact with blood and cerebrospinal fluid, and they facilitate special types of communication between the central nervous system and peripheral blood. [1] [8] [9] Additionally, they are an integral part of neuroendocrine function.

  8. Cerebral aqueduct - Wikipedia

    en.wikipedia.org/wiki/Cerebral_aqueduct

    Rostrally, it is continuous with the third ventricle, commencing just inferior to the posterior commissure. [3] Caudally, it is continuous with the fourth ventricle at the junction of the mesencephalon and pons. [3] The midbrain tegmentum is situated anteriorly to the cerebral aqueduct. [3]

  9. Choroid plexus - Wikipedia

    en.wikipedia.org/wiki/Choroid_plexus

    In the third ventricle, there is a small amount in the roof that is continuous with that in the body, via the interventricular foramina, the channels that connect the lateral ventricles with the third ventricle. A choroid plexus is in part of the roof of the fourth ventricle.