[Endoplasmic reticulum and mitochondria as elements of mechanism of intracellular signaling in neurons].

The temporal and spatial characteristics of a transitory increase in free Ca2+ ("calcium signals") concentration were determined in various types of the mice and rat neurones. Intracellular structures: endoplasmatic reticulum and mitochondria, were shown to play a major part in formation of these signals, the structures being able to absorb the Ca2+ ions from cytosol and release them back. The contribution of these processes proves rather varying depending on internal organisation and functional assignment of a neurone.