Cerebellum

Anatomy

The cerebellum is the person fills a large part of the posterior cranial fossa and is the largest Department in the rear of the brain; it is dorsal from the medulla oblongata and cetverokatnice and forms the roof of the fourth ventricle, the cavity of which is bordered by ependymal.
The weight of the cerebellum adult about 150 g, transverse diameter 10-11 cm, sagittal diameter his worm 3-4 cm hemisphere 5-6 see
The entire surface of the cerebellum cut numerous arranged in parallel grooves that separates narrow gyrus. The group's brains are combined in the lobules of the cerebellum, which are less deep grooves are divided into leaflets M (folia cerebelli).
The most common is anthropometric a classification based on the description of the external form is very difficult arranged mnogokratnogo body without taking into account the functional characteristics and separating M in the middle part (the worm - vermis) and two symmetrical side panels (hemisphere M - hemispheria cerebelli). In M. there are three surface: top, bottom, and front. Border worm and hemispheres on the upper surface of the cerebellum is not particularly marked on the lower surface between hemispheres and the worm is formed large hollow - Dolinka M. (vallecula cerebelli). The front surface M. facing the fourth ventricle, it is possible to see after transection legs M. and branch M. from the medulla oblongata and bridge (Fig. 3-5).

Fig. 3. Sagittal section of the human brain: 1 - culmen; 2 - declive; 3 - tuber vermis; 4 - pyramisvermis; 5 - uvulavermis; 6 - nodulus; 7-lingula; 8 - Iobulus centralis.
Fig. 4. The cerebellum, front and below: 1 - ala lobuli centralis; 2 - lobulus centralis; 3 - culmen; 4 - velum medullare sup.; 5 - nodulus; 6 - velum medullare inf.; 7 - reees-sus lat. ventriculi quarti; 8 - uvula; 9 - tonsilla cerebelli; 10 - lobulus biventer; 11 - plexus chorioideus ventriculi quarti; 12 - pedunculus flocculi; 13 - pedunculus cerebelli inf.; 14 - pedunculus cerebelli med.; 15 - pedunculus cerebelli sup.; 16 - n. trigeminus.
Fig. 5. The cerebellum, bottom view; 1 - flocculus,-2 - plexus chorioideus ventriculi quarti; I - tonsilla cerebelli; 4 - uvula; 5 - tuber vermis; 6 - pyramis; 7 - lobulus semilunaris inf.; 8 - lobulus semilunaris sup.; 9 - sulcus horizontalis cerebelli; 10 - lobulus biventer.

On the upper surface, respectively worm and cerebellar hemispheres there are the following segments and leaflets (front to back):

The the cerebellar vermis Cerebellar hemisphere
Lingula (tab) Vinculum lingulae (Svetochka reed)
Lobulus centralis (Central slice) Ala lobuli centralis (wings Central slices)
Culmen (top)
Declive (SKAT)
Lobulus quadrangularis (rectangular slice)
Folium vermis (sheet worm) Lobulus semilunaris superior (upper-moon slice)

On the bottom surface distinguish the following segments:

The the cerebellar vermis Cerebellar hemisphere
Tuber vermis (the hill of the worm) Lobulus semilunaris inferior (lower-moon slice)
Pyramis vermis (pyramid of the worm) Lobulus biventer (digastric clove)
Uvula vermis (tab of the worm) Tonsilla cerebelli (the amygdala of the cerebellum)
Nodulus (bundle) Flocculus (piece)