Fig. Mushroom-shaped dendritic spine (S) with axo-spinous synapse. D - dendritic shaft, arrow - spine apparatus in the spine neck. The appearance of the spine neck containing the spine apparatus as it looks cut transversally is shown in the inset. Scale = 300 nm. (Rat, hippocampus; inset: mouse, neocortex.) Download the high resolution image; Download the high resolution image (inset).