Abstract:Dendritic spines, actin-rich protrusions forming the postsynaptic sites of excitatory synapses, undergo activity-dependent molecular and structural remodeling. Activation of group 1 metabotropic glutamate receptors - mGluR1 and mGluR5 - by synaptic or pharmacological stimulation, induces LTD but whether this is accompanied with spine elimination remains unresolved. A subset of telencephalic mushroom spines contains the spine apparatus (SA), an enigmatic organelle composed of stacks of smooth endoplasmic reticu… Show more
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