Tentorium

Tentorium cerebelli is an extension of the dura mater that separates the cerebellum from the inferior part of the occipital lobes. The tentorium cerebelli (Latin for "tent of the cerebellum") is an arched lamina, elevated in the middle, and inclining downward toward the circumference.

Structure

The tentorium cerebelli is composed of two parts: the cerebellar tentorium and the cerebellar falx. The cerebellar tentorium is a crescent-shaped fold of dura mater that covers the cerebellum and supports the occipital lobes of the brain. The cerebellar falx is a small triangular process of dura mater, received into the posterior cerebellar notch.

Function

The tentorium cerebelli serves to protect the cerebellum and to keep it separate from the occipital lobes. It also provides a rigid support for the posterior part of the cerebral hemispheres.

Clinical significance

Damage to the tentorium cerebelli can lead to herniation of the brain, a potentially fatal condition. This can occur as a result of trauma, tumor, or increased intracranial pressure.

See also

• Falx cerebri
• Falx cerebelli
• Tentorial notch
• Tentorial herniation

External links

• Tentorium cerebelli at the US National Library of Medicine Medical Subject Headings (MeSH)