Effect of Associative Learning on Memory Spine Formation in Mouse Barrel Cortex

Figure 1

3D serial section EM reconstruction of three spine types from B2 barrel hollow, also shown in single electron micrographs: sER-free spine (a), spine containing sER (b), and spine containing spine apparatus (c). White arrows indicate sER ((b) and (c)) and black arrow indicates spine apparatus (c). (d)–(f) show reconstruction of dendritic spines (blue): excitatory synapses (green), inhibitory synapse (red; only (e)), smooth endoplasmic reticulum (yellow; (e)), and spine apparatus (red; (f)). Scale bars: 0.5 μm.

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