Cerebellum

The cerebellum, which is part of the brain, coordinates sensory input and muscle reactions located above and below the medulla and hemisphere of the brain.

The cerebellum integrates the nerve impulse from the maze and the position sensor in the muscle, the cerebellar signal determines the degree and timing of individual muscle fiber contractions to fine-tune while maintaining balance and posture, and the large Smooth cooperative movement of muscle groups

Like the brain, the cerebellum is divided into two outer hemispheres, which are connected by an intermediate part called the ankle. Each hemisphere consists of the central nucleus of white matter and the surface cortex of gray matter and is divided into three blades. The cotton-like nodule, the first part of the evolved cerebellum, receives sensory inputs from the vestibular ear and the last evolved posterior lobe receives nerve impulses from the brain. All these nerve impulses are integrated in the cerebellar cortex

Injuries or diseases affecting the cerebellum usually cause neuromuscular disorders, especially ataxia, or disorders of limb movement. Loss of comprehensive muscle control can cause tremors and standing up difficulties.

The cerebellum is behind the cerebral hemisphere. The cerebellum participates in smooth and cooperative exercise as well as exercise learning and adaptation. It is not directly related to the spinal cord, but it indirectly influences the movement through binding with the cerebellum, but those movements lack normal coordination; these characteristic defects are Together called ataxia. Cortical efferent fibers converge through the endocapsis, which is a very dense aggregate of cortical afferent fibers and efferent fibers located outside the thalamus. From these capsules, these and other descending fibers from paired cerebral infarction each contain about 20 million fibers. Between 85% and 95% of these fibers are terminated in the brain stem, occupying the largest proportion in the bridge.

The deep nucleus of the cerebellum is a mass of gray matter in the white matter of the cerebellar nucleus. In addition to nearby vestibular nuclei, they are the only source of cerebellar output. These nuclei undergo accidental projections from mossy fibers and ascending fibers and inhibitory inputs from cerebellar cortex Purkinje cells. Four nuclei (dentate, spherical, plugged, and apical) are each in communication with different parts of the brain and cerebellar cortex. (Spherical nucleus and embolus nucleus are also called bound within the inserted nucleus). The cerebellum and the inserted nucleus belong to the spinal cord cerebellum. The dentate nucleus is much larger in the mammal than the other parts and forms a thin, complex gray matter layer communicating with the outer part of the cerebellar cortex.