Which region of the central nervous system have an external layer of gray matter?

At the rear of the brain is the cerebellum. The cerebellum is similar to the cerebrum in that each has hemispheres that control the opposite side of the body and are covered by gray matter and surface folds. The vermis, which is a central constricted area, connects the hemispheres.

The cerebellum is concerned with the automatic regulation of movement and posture, and the learning of new motor patterns. The cerebellum basically coordinates body movement and is located at the back of the brain beneath the occipital lobes.

The cerebellum fine tunes motor activity or movement such as the fine movements of fingers. The cerebellum controls balance or equilibrium, posture, and coordination by controlling the tone of muscles and the position of limbs. The cerebellum is important in one's ability to perform rapid and repetitive actions such as playing a video game. In the cerebellum, right-sided abnormalities produce symptoms on the same side of the body.

The cerebellum functions closely with the cerebral cortex and the brain stem. It's separated from the cerebrum by the fold of dura called the tentorium. It's divided into two lateral lobes connected by a fingerlike bundle of white fibers called vermis. The outer layer of the cerebellum consists of fine folds called folia. Three fiber bundles called cerebellar peduncles connect the cerebellum to the three parts of the brain stem: The midbrain, the pons, and the medulla oblongata.

Damage to the cerebellum or the cerebellar peduncles is very common in multiple sclerosis (MS) due to the large amount of white matter in these structures.

Some of symptoms associated with damage to the cerebellum or the nervous tracts leading to it are:

The white matter regions of the central nervous system (CNS) contrast with the gray matter regions. The white matter refers to those parts of the brain and spinal cord that are responsible for communication between the various gray matter regions and between the gray matter and the rest of the body. In essence, the gray matter is where the processing is done and the white matter is the channels of communication.

The white matter is so-called because it contains many nerve fibers or neurons that are sheathed in the white fatty insulating protein called myelin. In section, myelin is white whereas the gray matter is that color due to all the gray nuclei contained in the cells that make it up.

The white matter is found in the inner layer of the cortex, the optic nerves, the central and lower areas of the brain or brainstem, and surrounding the central shaft of gray matter in the spinal cord.

MS is predominantly a disease of the white matter in the CNS. About 95% of all lesions associated with MS occur in the white matter.

The gray matter regions of the CNS, the brain and spinal cord, contrast with the white matter regions. The gray matter is the areas where the actual "processing" is done whereas the white matter provides the communication between different gray matter areas and between the gray matter and the rest of the body.

The neurons in the gray matter consist of neuronal cell bodies and their dendrites. The dendrites are short protrusions that communicate with immediately neighboring neurons in the CNS. In contrast with the neurons of the white matter, gray matter neurons don't contain long axons that transmit the nerve impulses to more distant regions of the CNS.

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Which region or regions of the central nervous system have an external layer of gray matter quizlet?

Where is grey matter of central nervous system?

Where in the central nervous system is the white matter exterior to the grey matter?