High Quality Content by WIKIPEDIA articles! Gliotransmitters are chemicals released from glial cells that facilitate neuronal communication between neurons and other glial cells and are usually induced from Ca2+ signaling. While gliotransmitters can be released from any glial cell, including oligodendrocytes, astrocytes, and microglia, they are primarily released from astrocytes. Astrocytes rely on gap junctions for coupling, and are star-like in shape, which allows them to come into contact with many other synapses in various regions of the brain. Their structure also makes them capable of bidirectional signaling. It is estimated that astrocytes can make contact with over 100,000 synapses, allowing them to play an essential role in synaptic transmission. While gliotransmission primarily occurs between astrocytes and neurons, gliotransmission is not limited to these two cell types. Besides the central nervous system, gliotransmission also occurs among motor nerve terminals and...

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