GENERAL HISTOLOGY

Detailed explanation-1: -Fibrous astrocytes are prevalent among myelinated nerve fibres in the white matter of the central nervous system. Organelles seen in the somata of neurons also are seen in astrocytes, but they appear to be much sparser.

Detailed explanation-2: -Fibrous astrocytes are found throughout all white matter and exhibit a morphology of many long fiber-like processes [191]. Classical and modern neuroanatomical studies also indicate that both astrocyte subtypes make extensive contacts with blood vessels (Fig. 1a, b).

Detailed explanation-3: -Astrocytes are a heterogeneous population of glial cells in the brain, which adapt their properties to the requirements of the local environment. Two major groups of astrocytes are protoplasmic astrocytes residing in gray matter as well as fibrous astrocytes of white matter.

Detailed explanation-4: -Astrocytes are resident glial cells derived from neuroectoderm and are often thought of as “nurse” cells for neurons in the brain parenchyma. These cells compose a large portion of the brain parenchyma and can be identified by their star-shaped morphology and expression of glial fibrillary acidic protein (GFAP).