What are the 4 parts of the cerebellum?

What are the 4 parts of the cerebellum?

The cerebellum can also be divided by function. There are three functional areas of the cerebellum – the cerebrocerebellum, the spinocerebellum and the vestibulocerebellum. Cerebrocerebellum – the largest division, formed by the lateral hemispheres. It is involved in planning movements and motor learning.

What structures make up the cerebellum?

The cerebellum consists of two major parts (Figure 5.2A). The cerebellar deep nuclei (or cerebellar nuclei) are the sole output structures of the cerebellum. These nuclei are encased by a highly convoluted sheet of tissue called the cerebellar cortex, which contains almost all of the neurons in the cerebellum.

What are the layers of the cerebellar cortex and their component cells?

The cerebellar cortex is formed by three layers, whose neuronal components include stellate and basket cells in the molecular layer, Purkinje and candelabrum cells in the Purkinje layer, and granule cells, Golgi cells, unipolar brush cells, and Lugaro cells in the granular layer.

How is the cerebellum divided?

Like the cerebrum, the cerebellum is divided into two lateral hemispheres, which are connected by a medial part called the vermis. Each of the hemispheres consists of a central core of white matter and a surface cortex of gray matter and is divided into three lobes.

What are cerebellar nuclei?

The cerebellar nuclei comprise 4 paired deep grey matter nuclei deep within the cerebellum near the fourth ventricle. They are arranged in the following order, from lateral to medial: dentate nuclei (the largest and most lateral) emboliform nuclei.

What is the groove above the cerebellum?

One such groove is the horizontal fissure, which arcs around the cerebellum along its lateral and posterior margins to the point of the posterolateral fissure (inferior to the flocculonodular lobe).

What comprises the brain stem?

The brainstem is the structure that connects the cerebrum of the brain to the spinal cord and cerebellum. It is composed of four sections in descending order: the diencephalon, midbrain, pons, and medulla oblongata.

What type of cells make up the cerebellum?

Five types of neurons inhabit the cerebellar cortex, with a sixth type being found primarily in the floccular lobe and the vermis (the unipolar brush cell). Four are inhibitory (Purkinje, basket, stellate and Golgi cells) and two are excitatory (granule cells, unipolar brush cells) .

What is fissure of cerebellum?

The monticulus of the cerebellum is divided by the primary fissure (or preclival fissure) into an anterior, raised part, the culmen or summit, and a posterior sloped part, the clivus; the quadrangular lobule is similarly divided. Primary fissure of cerebellum. Upper surface of the cerebellum.