Fig. Three consecutive serial sections through a giant axon terminal synapsing with a complex dendritic spine (asterisk). Massive accumulation of polyribosomes is present in the spine (arrow). D - dendritic shaft. Three-dimensional reconstruction of this dendritic spine is shown in Fig. Scale = 500 nm. (Rat, ventrobasal thalamic nucleus.) Download the high resolution image; Download the high resolution image (a); Download the high resolution image (b).