Astrocytes and oligodendrocytes are main players in the brain to ensure ion and neurotransmitter homeostasis. metabolic supply. and fast action potential propagation in axons. These functions are fostered by the formation of large syncytia in which mainly astrocytes and oligodendrocytes are directly coupled. http://www.roneverhart.com/Liftmaster-850lm-Gate-Receiver-Package-With-2-copyright-Remotes/