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The cerebellum, organ of the suprasegmental nervous system, derives from the dorsal part of the metencephalon and is located dorsally to the bulb and the bridge, contributing to the formation of the roof of the IV ventricle. It rests on the cerebellar fossa of the occipital bone and is separated from the occipital lobe by a crease of the dura called the cerebellum tent.

It connects to the medulla and bulb by the inferior cerebellar peduncle and to the bridge and midbrain by the middle and superior cerebellar peduncles, respectively. From a physiological point of view, the cerebellum differs fundamentally from the brain because it always functions on an involuntary and unconscious level, and its function is exclusively motor (balance and coordination).

AnatomicallyCerebellum , distinguishes in the cerebellum, an odd and median portion, the vermis, connected to two great lateral masses, the cerebellar hemispheres. The worm is little separated from the hemispheres on the upper face of the cerebellum, which does not occur on the lower face, where two furrows are quite evident separating it from the lateral parts.




Cerebellum - Bottom View
Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.
Cerebellum - Top View
Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

The surface presents predominantly transverse direction grooves, which delimit thin lamina called cerebellum leaves. There are also more pronounced grooves, the cerebellum fissures, which delimit lobes, each of which may contain several leaves. This arrangement, visible on the surface of the cerebellum, is especially evident in sections of this organ, which also give an idea of its internal organization. It is thus seen that the cerebellum is made up of a center of white matter, the medullary body of the cerebellum, from which radiates the white sheet of the cerebellum, externally lined with a thin layer of gray matter, the cerebellar cortex. The medullary body of the cerebellum with its white blades, when viewed in sagittal sections, is named & #8220; tree of life & #8221 ;. Within the medullary field there are four pairs of gray matter nuclei, which are the central nuclei of the cerebellum: jagged, emboliform, globose, and fastigial.

Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Cerebellum Lobes: The division of the cerebellum into lobes has no functional significance and its importance is only topographic. The lobes are given different names in the worm and hemispheres. Each lobe of the vertex corresponds to two hemispheres.

The lingula is almost always attached to the upper medullary veil. Folium consists of only one leaf of the vérmix. An important lobe is the floccule, located just below the point where the middle cerebellar peduncle penetrates the cerebellum, close to the vestibulo-cochlear nerve. It attaches to the nodule, lobe of the vertex, through the pedicle of the floccule. The tonsils are very evident in the lower part of the cerebellum, projecting medially over the dorsal surface of the bulb.

Cerebellum - Medial View
Source: NETTER, Frank H .. Atlas of Human Anatomy. 2 ed. Porto Alegre: Artmed, 2000.

Cerebellum Fissures:

& #8211; After the lingula we have the pre-central cleft.

& #8211; After the central lobe we have the pre-culminating cleft.

& #8211; After the bulmen we have the cleft cleft.

& #8211; After the slope we have the postclival cleft.

& #8211; After the folium we have the horizontal crack.

& #8211; After the tub we have the pre-pyramidal cleft.

& #8211; After the pyramid we have the post pyramidal fissure.

& #8211; After the uvula we have the posterolateral fissure.

Cerebellum Fissures

 Cerebellum - Side View
Source: AX, Angelo. Functional Neuroanatomy. Rio de Janeiro / Sao Paulo: Atheneu, 1991.


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Brain Vascularization

Peripheral Nervous System