Arbor vitae (anatomy)

Arbor vitae (Latin for "Tree of Life") is a term used in anatomy to refer to the cerebellar white matter, which, when sectioned sagittally, exhibits a tree-like appearance. This structure is crucial for the proper functioning of the brain, particularly in the coordination of movements and the maintenance of balance.

Structure

The arbor vitae is located within the cerebellum, one of the primary divisions of the brain. It is composed of white matter, so named for its pale appearance due to the high concentration of myelin in these areas. The arbor vitae extends from the cerebellar cortex into the cerebellar white matter, forming a complex branching pattern reminiscent of a tree, hence its name.

Function

The primary function of the arbor vitae is to bring sensory and motor information to and from the cerebellum. It plays a crucial role in the coordination of voluntary motor movements, balance and equilibrium, and muscle tone regulation. Disruptions to the arbor vitae can lead to a variety of neurological disorders, including ataxia, which is characterized by a lack of voluntary coordination of muscle movements.

Clinical significance

Due to its role in motor coordination, damage to the arbor vitae can have severe consequences. Conditions such as spinocerebellar ataxia and Friedreich's ataxia are associated with degeneration of the arbor vitae. Additionally, certain types of brain tumors, such as medulloblastomas, can occur in proximity to the arbor vitae, potentially disrupting its function.

See also

• Cerebellum
• White matter
• Ataxia