Glial cells or supporting tissue located on the outer surface or margin of the nervous system or brain.
From Greek 'ekto-' (outside) + 'glia' (glue, referring to supporting cells in the nervous system). This term identifies a population of glial cells positioned peripherally rather than within central neural structures.
Your brain is surrounded by a layer of specialized support cells called ectoglia that protect it like a cushioning boundary—damage to this layer can make you more vulnerable to brain injury.
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