Journal
NATURE NEUROSCIENCE
Volume 4, Issue 8, Pages 803-812Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/90507
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Astrocytes respond to chemical, electrical and mechanical stimuli with transient increases in intracellular calcium concentration ([Ca2+](i)). We now show that astrocytes in situ display intrinsic [Ca2+](i) oscillations that are not driven by neuronal activity. These spontaneous astrocytic oscillations can propagate as waves to neighboring astrocytes and trigger slowly decaying NMDA receptor-mediated inward currents in neurons located along the wave path. These findings show that astrocytes in situ can act as a primary source for generating neuronal activity in the mammalian central nervous system.
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