3. SUMMARY

The ganglion is a small structure covered by a capsule; the parenchyma under the capsule contains bodies of nervous cells and nerve fibres. A regular arrangement (separating the parenchyma in groups of ganglionic cells from nerve fibres filling in the space left between the groups) is characteristic of the craniospinal ganglia. Another feature includes myelinated nerve fibres. Ganglionic cells are large, their body is lined with a continuous layer of satellite cells. The presence of the spinal cord makes a diagnosis of the slide easier.