Cobalt Supercharged Specs

CEREBELLUM.

THE CEREBELLUM

It is located within the posterior cranial fossa, behind the pons and medulla, and covered by the tentorium.

consists of two hemispheres connected by a middle portion, the vermis. The cerebellum has an ovoid shape and is connected to the midbrain peduncles superior cerebellar, to bump the middle cerebellar peduncles and the medulla oblongata by the inferior cerebellar peduncle.

At the top we have the raw fissure or groove on the back or flocculonodular posterolateral fissure.

The cerebellum is divided into three main lobes: the anterior lobe, middle lobe and the lobe flocculonodular.

The anterior lobe can be seen on the upper surface the cerebellum and the middle lobe is separated by a V-shaped fissure called the fissure prima; vermis level corresponds to the lingula, central lobule and culmen, and cerebellar hemispheres correspond to the wing of central lobule and the quadrangular lobule above.

middle or posterior lobe , is the largest part of the cerebellum, is located between the premium and flocculonodular fissures, a level corresponding to the decline vermis, folium, tuber, pyramid and uvula , and cerebellar hemispheres correspond to simple or quadrangular lobule posterior superior lunate, inferior semilunar, gracile, and amygdala digastric cerebellum.

flocculonodular lobe is located behind the fissure flocculonodular, in the vermis have the nodule in the cerebellar hemispheres and the flocculus. A deep horizontal fissure is located along the margin of the cerebellum separating the upper surfaces of the bottom.

The cerebellum is composed of an outer shell called the cortex gray matter and white matter internally. Inside the white matter in each hemisphere there are three masses of gray matter forming the cores intercerebelosos.

Phylogenetic Division Cerebellum of .

Arquicerebelo.
- flocculonodular lobe. Balance.

paleocerebellum.
- anterior lobe. Muscle tone.
- uvula and pyramid of the vermis. Gross movements.

neocerebellum .
- middle lobe and vermis.
voluntary movement control (except uvula and pyramid). Fine movements.

INTERNAL STRUCTURE the cerebellar cortex.

can be considered a large sheet folds located in the coronal or transverse plane. Each fold or folium contains a center of white matter covered by gray surface. A cut parallel to the median plane divides the folia at right angles and the cut surface looks branched tree called life.

The gray matter of the cortex in its entirety has a uniform structure. Can be divided into 3 layers:

molecular layer. contains two types of neurons: stellate cells and the cell external in inner basket. These neurons are scattered among the dendritic arborizations and numerous thin axons that run parallel to the axis of the folia. Glial cells were found between these structures.

middle layer of Purkinje cells or . Purkinje cells are Golgi type 1 neurons larger. Flask-shaped and are arranged in a single layer. At the base of these cells, the axon arises and passes through the granular layer to enter the white matter. By accessing the the axon acquires a myelin sheath and terminated by a cell synapse in the nuclei intracerebelosos. The branches of Purkinje axon collaterals make synaptic contacts with dendrites of basket and stellate cells in the granular layer in the same or distant folia.

granulosa layer. is full of small cells with densely stained nuclei and have scant cytoplasm. Each cell gives rise to 4 or 5 dendrites that have endings like claws and make synaptic contact with mossy fiber afferents. The axon of each granular cell passes into the molecular layer where it bifurcates in a T-junction, whose branches run parallel to the axis of the cerebellar folium. Over this layer are glial cells and golgi.

functional areas of the cerebellar cortex.

vermis cortex influences the movements of the body axis, ie, neck, shoulders, chest, abdomen and hips. Immediately lateral to the vermis is the intermediate zone of cerebellum, an area that controls the muscles of the distal parts of limbs. Nuclei

intracerebelosos.

are 4 masses of gray matter included in the white matter of cerebellum on each side of the midline. The cores are intracerebelosos composed of large multipolar neurons with simple branching dendrites, axons grow in the efferent cerebellar superior and inferior cerebellar peduncles. From outside to inside, the kernels are:

dentate nucleus, the largest of the cerebellar nuclei. It's shaped like a crumpled bag with the opening facing the inner side. Inside the bag is filled with white substance formed by efferent fibers leave the nucleus through the hole to form much of the superior cerebellar peduncle. Has information neocerebellum (middle lobe and vermis).

emboliforme Core or anterior interpositus is oval and is located medial to the dentate nucleus and partially covers the hilum. Paleocerebellum has information.

globose nucleus, consisting of one or more groups of rounded cells that are located within the nucleus emboliforme. Paleocerebellum has information.

fastigial core, is located near the midline in the vermis and near the roof of the 4th ventricle, is larger than the spherical core. Has arquicerebelo information.

white substance.
There is a small amount of white matter in the vermis and closely resembles the trunk and branches of a tree: the tree of life. There is a large amount of white matter in each hemisphere of the cerebellum.

The white substance is formed by 3 groups of fibers: intrinsic, afferent and efferent.
- intrinsic fibers. Do not leave the cerebellum.
- afferent fibers. Information reaches the middle and inferior cerebellar peduncles.
- efferent fibers. Sale information superior cerebellar peduncle, except the information from the kernel of the roof that goes from the lower stalk.

cerebellar peduncles.

Superior, connects with the midbrain. Middle connects to the pons. Bottom, is connected to the medulla.

grooves, flakes and fissures.

The surface of the cerebellum appears crossed by a series of narrow grooves arranged crosswise. The portion between the grooves is called cerebellar foil or foil. The cracks are deeper than the grooves and move from one to the other hemisphere through vermis, dividing the body into several lobes. We consider the lobes and fissures in both hemispheres and in the vermis, stepped in anteroposterior. The divisions of the vermis but different names to the lobes, the divisions of the vermis are

Lingula, anterior portion of the vermis and is attached to the anterior medullary velum. Lingula laterally continuous with the hemispheres by 2 small side extensions, links. The lingula and the links are limited by the precentral fissure that separates the central lobe.

central lobe, is among the precentral fissure and preculminar. Their lateral extensions are small and are called wings of central lobe.

Culmen, behind the central lobe of the vermis than rises to form the mound, the anterior slope of these is called summit and lies between the fissure and fissure preculminar higher premium or above. The extension hemispheric summit comprised of the same fissures lobe called the anterior semilunar.

Decline, the posterior side of the mound where their hemispheric extensions are called semilunar lobes later. These portions are between the crack or fissure anterior superior premium and the posterior superior fissure.

Folium, the following division of the vermis is very thin folium vernis and is located in the depth of the posterior cerebellar notch, links 2 large hemispheric portions. Superior semilunar lobules as are between the posterior superior fissure and horizontal.

Irrigation.

superior cerebellar artery, anterior and posterior.

venous drainage.
great cerebral vein or dural sinus neighbors rectum and anterior occipital.

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