Three multipolar neuron cell bodies from ventral horn gray matter of the spinal cord are shown (Nissl stain). Typical features of neuronal perikaria include a prominent nucleolus (green arrow) within a large leptochromatic nucleus and clumps (red arrows) of Nissl substance (rER & polyribosomes). Nissl substance (chromatic substance) extends into the base of each dendrite (D) but not into the axon hillock that gives rise to the axon (A).