T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
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Nerve fibers - unmyelinated and myelinated axons of different diameters
Mylenated Fibers - unstained because lipids of the myelin sheaths were extracted during staining (appears foamy)
Epineurium - fragments of dense irregular connective tissue that surround nerves
Dorsal Root Ganglion
Click the thumbnail to show this specimen stained with myelin stain.
Wegert's stan involves preserving myelin lipids with potassium dichromate and staining with hematoxylin. Myelin sheaths appear black, providing a useful technique for visualizing fiber pathways.
Dorsal root ganglion is an aggregation of sensory neurons (pseudo-unipolar) located on each spinal root.
Ganglion Cells - cell bodies are non-specifically stained to varying degrees from yellow to black
Because of their small size relative the cell bodies, the axon exiting the cell bodies is seen infrequently (#1, #2, and #3).