Gray matter of brain

Macroglial cells are of ectodermal origin and include the astrocytes, ependymal cells, oligodendrocytes, and Schwann cells. Astrocytes appear to be primarily supportive in function and under microscopic examination can be seen to envelope axons and dendrites and buttress against the adventitial layer of blood vessels. In the gray matter of brain, which is composed primarily of perikarya, they have a clear protoplasmic appearance, whereas in the white matter, which is composed primarily of neuronal processes, they appear fibrous. Ependymal cells line the ventricles of the brain, are ciliated. 

N-Acetylhexosammidase A (EC 3.2.1.30). Gii accumulates intraneuronally in white and gray matter of brain small quantities accumulate in liver and spleen. Manifested at 18-40 years (sometimes 2-4 years, followed by slow progression). Mental and motor deterioration. Death in few years after first manifestation. 

Gangliosides were found in highest concentration in the gray matter of brain hrom animals of the phylum Chordata. Brain ganglio-... 

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