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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. Rhomboid fossa - Wikipedia

   en.wikipedia.org/wiki/Rhomboid_fossa

   Its anterior wall, formed by the back of the pons and the medulla oblongata, constitutes the floor of the fourth ventricle. It is covered by a thin layer of grey matter continuous with that of the spinal cord; superficial to this is a thin lamina of neuroglia which constitutes the ependyma of the ventricle and supports a layer of ciliated ...

4. Hindbrain - Wikipedia

   en.wikipedia.org/wiki/Hindbrain

   Diagram depicting the main subdivisions of the embryonic vertebrate brain. These regions will later differentiate into forebrain , midbrain and hindbrain structures. Scheme of the roof of the fourth ventricle.

5. Facial colliculus - Wikipedia

   en.wikipedia.org/wiki/Facial_colliculus

   The facial colliculus is an elevated area located in the pontine tegmentum (dorsal pons), [citation needed] within the floor of the fourth ventricle (i.e. the rhomboid fossa). It is formed by fibres from the facial motor nucleus looping over the abducens nucleus. The facial colliculus is an essential landmark of the rhomboid fossa. [1]

6. Midbrain tegmentum - Wikipedia

   en.wikipedia.org/wiki/Midbrain_tegmentum

   It forms the floor of the midbrain that surrounds below the cerebral aqueduct as well as the floor of the fourth ventricle while the midbrain tectum forms the roof of the fourth ventricle. The tegmentum contains a collection of tracts and nuclei with movement-related, species-specific, and pain-perception functions.

7. Ventricular system - Wikipedia

   en.wikipedia.org/wiki/Ventricular_system

   The ventricles contained within the rhombencephalon become the fourth ventricle, and the ventricles contained within the mesencephalon become the aqueduct of Sylvius. Separating the anterior horns of the lateral ventricles is the septum pellucidum : a thin, triangular, vertical membrane which runs as a sheet from the corpus callosum down to the ...

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9. Locus coeruleus - Wikipedia

   en.wikipedia.org/wiki/Locus_coeruleus

   The locus coeruleus (LC) is located in the posterior area of the rostral pons in the lateral floor of the fourth ventricle. It is composed of mostly medium-size neurons. Melanin granules inside the neurons of the LC contribute to its blue colour. Thus, it is also known as the nucleus pigmentosus pontis, meaning "heavily pigmented nucleus of the ...