Fourth Ventricle


	Latin
	GraySubject	187
	GrayPage	797
	Image	Gray701png
	Caption	Coronal section of the Pons , at its upper part (Fourth ventricle visible near top)
	Image2	Gray695png
	Caption2	Transverse section of Medulla Oblongata below the middle of the Olive (Fourth ventricle visible near top)
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	Components
	Artery
	Vein
	BrainInfoType	hier
	BrainInfoNumber	617
	MeshName	Fourth+Ventricle
	MeshNumber	A08186211276500

The fourth ventricle is one of the four connected fluid-filled cavities within the human Brain . These cavities, known collectively as the Ventricular System , consist of the left and right lateral ventricles, the Third Ventricle , and the fourth ventricle. The fourth ventricle extends from the Cerebral Aqueduct (''aqueduct of Sylvius'') to the Obex , and is filled with Cerebrospinal Fluid (CSF).

The fourth ventricle has a characteristic diamond shape in cross-sections of the human brain. It is located within the (see List Of Human Anatomical Parts Named After People ).

The fourth ventricle has a "roof" Dorsally and a "floor" ventrally. The roof of the fourth ventricle is formed by the Cerebellum , with the side "walls" formed by the cerebellar peduncles. Among the prominent features of the floor of the fourth ventricle are the:

''' as it loops around the Abducens Nucleus in the lower Pons ;

''' and the Basal Plate of the developing Neural Tube ;

''' of the Skull and therefore is a marker for the imaginary dividing line between the Medulla and Spinal Cord .

EXTERNAL LINKS

Picture at University of Arkansas

High resolution neuroanatomical images of the fourth ventricle

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Fourth Ventricle