Glia selectively approach synapses on thin dendritic spines

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Glia selectively approach synapses on thin dendritic spines

Medvedev, Nikolai; Popov, Victor; Henneberger, Christian; Kraev, Igor; Rusakov, Dmitri A.; Stewart, Michael G.

Philosophical transactions of the Royal Society of London. Series B. Biological sciences, 10/2014, Volume: 369, Issue: 1654

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This paper examines the relationship between the morphological modality of 189 dendritic spines and the surrounding astroglia using full three-dimensional reconstructions of neuropil fragments. An integrative measure of three-dimensional glial coverage confirms that thin spine postsynaptic densities are more tightly surrounded by glia. This distinction suggests that diffusion-dependent synapse–glia communication near ‘learning’ synapses (associated with thin spines) could be stronger than that near ‘memory’ synapses (associated with larger spines).

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