There appear to be two separate pathways that result in the formation of astrocytes. The first pathway suggests that astrocytes are produced by immature cells of the ventricular zone but must temporarily pass via a radial glial cell intermediary. The other pathway proposes that astrocytes are direct descendants of immature cells in the germinal zones and do not pass via a radial cell intermediary stage. The first pathway results in response to epidermal growth factors and is separate from oligodendrocyte lineage. The second pathway shares a common progenitor with oligoden-

Blood vessel

Conquering Fear In The 21th Century

Conquering Fear In The 21th Century

The Ultimate Guide To Overcoming Fear And Getting Breakthroughs. Fear is without doubt among the strongest and most influential emotional responses we have, and it may act as both a protective and destructive force depending upon the situation.

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