Multipolar Nerve Cells Spinal Cord

In the cytoplasm (perikaryon) of nerve cells and in the dendrites, basic dyes bring out fine or coarse granules, which are called Nissl bodies (chromophilic or Nissl substance) after their discoverer (cf. Fig. 20). Nissl bodies are portions of the rough endoplasmic reticulum (rER) (cf. Fig. 24). The base of the axon, the axon hillock, is free of Nissl bodies and so is the axoplasm. The left process from this multipolar nerve cell from the columna anterior of the spinal cord is in all likelihood an axon (neurite). The other processes are dendrites. Note the large cell nucleus with its clearly outlined nucleolus. The nerve cell is surrounded by a neuropil. Neuropils are the structures that fill the spaces between perikarya. The neurophil elements consist of glial cells with their processes, the processes of nerve cells and capillaries.

1 Glial cells

Stain: Nissl cresyl violet; magnification: x 400

Nerve Cell X400 Magnification

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