Roof of fourth ventricle

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Roof of fourth ventricle

The roof of the fourth ventricle is a structure in the human brain that forms the dorsal aspect of the fourth ventricle. The fourth ventricle is one of the interconnected fluid-filled cavities within the ventricular system of the brain, which also includes the lateral ventricles, the third ventricle, and the cerebral aqueduct.

Anatomy

The roof of the fourth ventricle is composed of two parts: the superior and inferior medullary vela. The superior medullary velum is a thin layer of white matter that extends between the superior cerebellar peduncles. The inferior medullary velum is a similar structure that extends from the nodule of the cerebellum to the choroid plexus of the fourth ventricle.

Function

The primary function of the roof of the fourth ventricle is to form a barrier between the cerebrospinal fluid (CSF) within the fourth ventricle and the surrounding brain tissue. It also plays a role in the production and regulation of CSF, which is essential for cushioning the brain, removing waste products, and maintaining intracranial pressure.

Clinical Significance

Lesions or abnormalities in the roof of the fourth ventricle can lead to various neurological conditions. For instance, tumors or cysts in this area can obstruct the flow of CSF, leading to hydrocephalus. Additionally, damage to the structures forming the roof of the fourth ventricle can affect the function of the cerebellum and other nearby brain regions, resulting in symptoms such as ataxia, vertigo, and other balance disorders.

Related Structures

• Fourth ventricle
• Cerebellum
• Choroid plexus
• Cerebrospinal fluid
• Ventricular system
• Superior medullary velum
• Inferior medullary velum

See Also

• Ventricular system
• Cerebrospinal fluid
• Hydrocephalus
• Cerebellum