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Diagram of a neuronal dendrite and spine. Excitatory synapses that use glutamate form synapses on dendritic spins but inhibitory neurons form synapses on the body of the dendrite. Spines change shape in response to excitatory activity, mature spines are shorter than immature spines, which are receiving less excitatory input. PSD = postsynaptic density; BDNF= brain derived neurotrophic factor.
