The cerebellum (cerebellum) lies under the occipital lobes of the cerebral hemispheres, separated from it a horizontal slit (fissura horizontalis) and situated in the posterior fossa (fossa cranii posterior). Front of him in the bridge and the medulla. The cerebellum consists of two hemispheres (hemispheria cerebelli), each of which secrete the top (fasies superior) and lower (fasies inferior) surface. In addition, there is the middle part of the cerebellum - the worm (vermis), which separates the hemispheres from each other. The gray matter of the cerebellar cortex (cortex cerebelli), consisting of bodies of neurons, deep furrows divided into segments. Smaller grooves separated from each other pieces of the cerebellum (folia cerebelli). The bark of the cerebellum branches and penetrates into the white substance, which is the body of the cerebellum (corpus medullare), formed by processes of nerve cells. White matter, branching, penetrates the convolutions in the form of white plates (laminae albae).
Gray matter contains a pair of nuclei that lie deep in the cerebellum and form the core of the tent (nucleus fastigii), referring to the vestibular apparatus. Lateral to the tent are spherical (nucleus globosus) and probkovidnoe (nucleus emboliformis) nucleus, are responsible for working muscles of the trunk, then the gear core (nucleus dentalis), which controls the operation of the extremities.
|In Fig. 260.
The cerebellum is a side view
1 - foot cord;
2 - the top surface of cerebellar hemisphere;
3 - the pituitary gland;
4 - white plates;
5 - bridge;
6 - toothed core;
7 - white matter;
8 - the medulla oblongata;
9 - kernel olives;
10 - lower surface of the cerebellar hemispheres;
11 - spinal cord
|In Fig. 261.
The cerebellum is a vertical section
1 - the top surface of cerebellar hemisphere;
2 - white plates;
3 - worm;
4 - the white matter;
5 - tent;
6 - the horizontal gap;
7 - lower surface of the cerebellar hemisphere
The cerebellum communicates with peripherals through other parts of the brain with which it is connected by three pairs of legs. The upper legs (pedunculus cerebellsris superior) connect the cerebellum with the midbrain, the average (pedunculus cerebellsris medius) - the bridge, and the lower (pedunculus cerebellsris inferior) - from the medulla.
|In Fig. 262.
The legs of the brain
1 - the upper leg of the cerebellum;
2 - the pyramidal tract;
3 - foot of the telencephalon;
4 - average leg of the cerebellum;
5 - bridge;
6 - the lower leg of the cerebellum;
7 - olive;
8 - Pyramid;
9 - anterior midline cleft
The main function of the cerebellum - coordination of movements, but in addition, he performs some vegetative functions, taking part in the management of the vegetative organs and partly controlling the skeletal muscles.
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)