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The arbor vitae / ˌ ɑːr b ɔːr ˈ v aɪ t iː / (Latin for "tree of life") is the cerebellar white matter, so called for its branched, tree-like appearance. In some ways it more resembles a fern and is present in both cerebellar hemispheres. [1] It brings sensory and motor information to and from the cerebellum. The arbor vitae is located ...
Both the vermis and the hemispheres are composed of lobules formed by groups of folia. There are nine lobules of the vermis: lingula, central lobule, culmen, clivus, folium of the vermis, tuber, pyramid, uvula and nodule. [9] These lobules are often difficult to observe during human anatomy classes and may vary in size, shape and number of folia.
The white matter of the cerebellum is known as the arbor vitae (tree of life) because of its branched, tree-like appearance. Embedded within this are four deep cerebellar nuclei . The cerebellum can be divided according to three different criteria: gross anatomical, phylogenetical, and functional.
Embedded within the white matter—which is sometimes called the arbor vitae (tree of life) because of its branched, tree-like appearance in cross-section—are four deep cerebellar nuclei, composed of gray matter. [14] Connecting the cerebellum to different parts of the nervous system are three paired cerebellar peduncles.
The cerebellum consists of three parts, a median and two lateral, which are continuous with each other, and are substantially the same in structure. The median portion is constricted, and is called the vermis, from its annulated appearance which it owes to the transverse ridges and furrows upon it; the lateral expanded portions are named the hemispheres.
Afferents of the lobe are the vestibulocerebellar fibers arising from either the vestibular nuclei or the vestibular nerve/ganglion directly.. Vestibular organs → vestibular nerve/vestibular ganglion first-order fibers (→ vestibular nuclei (synapse) → second-order fibers) → juxtarestiform body of inferior cerebellar peduncle → (ipsilateral) flocculonodular lobe of cerebellum (synapse ...
They ascend into the white matter of the cerebellum, where each axon branches to innervate granule cells in several cerebellar folia. In this case, the pathway is so named for a unique synapse formed by its projections, the mossy fiber rosette .
The flocculus (Latin: tuft of wool, diminutive) is a small lobe of the cerebellum at the posterior border of the middle cerebellar peduncle anterior to the biventer lobule.