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.
Show 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 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.
Enlarge by passing over or clickingimage info This image is Copyright © My-MS.org and falls under Image License E defined under the Image License section of the Disclaimer page.About 40% of the human brain is made up of gray matter and the other 60% is white matter. The gray matter, however, consumes about 94% of the total oxygen used by the brain. The vast majority of MS lesions occur in the white matter areas but a small number, about 5%, do occur within the gray matter. Gray matter is so-called because in section it has a gray color due to all the gray nuclei in the cells that make it up. Gray matter involvement is detected even in the earliest stages of MS, and gray matter atrophy occurs at a faster rate than white matter atrophy early in the disease course. Studies have determined that:
It's likely that gray matter damage is related to white matter damage. However, continued studies of gray matter pathology as well as neuronal and axonal involvement in MS and related experimental models are necessary to better understand the etiology and pathogenesis of the degenerative components. In a recent supplement to Neurology, it was stated basically that recent studies have found that gray matter damage, which isn't effectively detected through MRI, may be more pronounced than white matter damage, especially early in the disease process, and can have considerable impact on clinico-cognitive functioning and neuro-psychological deficits. So gray matter damage is probably greater than earlier believed or seen on an MRI and because of this finding, it's felt that cognitive and psychological functions may have been impacted to a greater extent. What is the difference between gray matter and white matter in the spinal cord?What is the function of gray matter and white matter? Gray matter largely functions to receive information and regulate outgoing information, as it contains the cell bodies of neurons. White matter, which is largely composed of axons, serves to transmit signals to other regions of the brain, spinal cord, and body.
What are the main differences between gray matter and white matter quizlet?What is the difference between gray matter and white matter. Gray matter does not contain mylein sheath over the axon. White matter has a myelin sheath covering. Nodes of Ranvier are small gaps between the myelin sheath.
How are white and gray matter different from one another quizlet?grey is unmyelinated and white is myelinated. white is in brain and spinal cord myelinated axon. gray are cell bodies, dendrite, and unmyelinated axons. grey matter contains unmyelinated neurons while white matter does.
What is gray matter and white matter quizlet?White Matter. Bundles of axons each coated with a sheath myelin. Gray Matter. Composed of motor neurons and interneuron cell bodies, dendrites, and unmyelinated axons.
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