MH 050 Dorsal Root Ganglion

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Dorsal Root Ganglion

It is difficult to identify nerve fibers and connective tissue in this cross section of a dorsal root ganglion because both stain pink/red.

Compare this slide with MH 051 Dorsal Root Ganglion (Azan).

- large, nerve with large nuclei and prominent nucleoli. Their cytoplasm contains abundant Nissl substance.
- - yellow-brown pigment granules in some nerve cell bodies.
- glial cells at the periphery of nerve cell bodies.
- non-myelinated and myelinated axons of different diameters seen in cross-section.
- Axon - pink material at the center of each nerve fiber.
- Schwann Cells - glial cells that wrap axons in the peripheral nervous system. Their large, round nuclei are adjacent to some axons.
  - Myelin Sheath - pink/red material surrounding myelinated axons. Often has a fluted appearance.
- Endoneurium - connective tissue (dark blue) surrounding each nerve fiber.
- their small nuclei are seen in the endoneurium. (Most frequent nuclei in cross-sections of nerve fibers.)
- dense irregular connective tissue (pink/red) that is continuous with the epineurium of the nerve.