In the brain, the grey matter is present at the outer side of the cerebrum and the cerebellum which are called the cerebral cortex and cerebellar cortex, respectively. The chief contents of grey matter are unmyelinated neurons and neuronal cell bodies which are present in the brain, the brainstem, and the spinal cord. The grey matter actually has a pinkish and yellowish hue in its grey color, which comes from cell bodies of neurons and blood capillaries. ![]() It also contains dendrites, unmyelinated axons, glial cells: the astrocytes and the oligodendrocytes, and some capillaries. The grey matter consists of the soma or the cell bodies of neurons that are present in the brain and the spinal cord. In this article, we will discuss the structure, location, function, and diseases of both structures. Yet, it is not that simple as both structures contain specific anatomical and functional areas that have a complex and diverse role in the body. As it is obvious from their names, the grey matter is a greyish looking substance in the brain and the spinal cord while the white matter appears white in the brain and also in the spinal cord. The two structures, the grey matter, and the white matter, also refers to a classification of the central nervous system. ![]() It has been divided into several parts, hemispheres, and lobes. The central nervous system has a very complex anatomical structure.
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