Nasal glial heterotopia Nasal glial heterotopia Nasal glial heterotopia refers to congenital malformations of displaced normal, mature glial tissue, which are no longer in continuity with an intracranial component. This is distinctly different from an encephalocele, which is a herniation of brain tissue and/or leptomeninges, that develops through a defect in the skull, where there is a continuity with the cranial cavity. While nasal glial heterotopia (NGH) is the preferred term, synonyms have included nasal glioma. However, this term is to be discouraged, as it implies a neoplasm or tumor, which it is not. By definition, nasal glial heterotopia is a specific type
Radial glial cell period of interest in radial glia, little additional information was learned about these cells until the electron microscope and immunohistochemistry became available some 60 years later. Radial glial cell Radial glial cells are bipolar-shaped cells that span the width of the cortex in the developing vertebrate central nervous system (CNS) and serve as primary progenitor cells capable of generating neurons, astrocytes, and oligodendrocytes. Their cell bodies (somata) reside in the embryonic ventricular zone, which lies next to the developing ventricular system. During development, newborn neurons use radial glia as scaffolds, traveling along the radial glial fibers in order to reach