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Description: According to Bourne and Harris (2007), long-term potentiation may convert thin spines into mushroom-shaped spines. (a) Colorized photomicrograph. Dendrite shafts are yellow, spine necks are blue, spine heads are green, and presynaptic terminals are orange. (b) Three-dimensional reconstruction of a portion of a dendrite (yellow) showing the variation in size and shape of postsynaptic densities (red). (From Bourne, J., and Harris, K. M. Current Opinion in Neurobiology, 2007, 17, 381–386. Reprinted with permission.)
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