Fig. 1.4.1.22. Dendritic spine synapses are found in variety of shapes including macular (sm), perforated (sp), and crest (arrow) synapses. A shaft synapse is also apparent on one dendrite (D). Nearby lies a neuronal perikaryon containing a lysosome (L) and a granulofilamentous nucleolus-like body (N). Scale = 500 nm. (Mouse, neocortex.) Download the high resolution image.