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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Emitting from the spinal cord are dorsal and ventral roots. The dorsal roots contain sensory nerve fibers and the ventral roots contain motor nerve fibers.
Unlike motor neurons, which have cell bodies in the ventral horn of the spinal cord, sensory neurons have their cell bodies massed together in ganglia located outside of the spinal cord.
Dorsal Root Ganglion (left, right) - aggregation of sensory neurons (pseudounipolar) located on each dorsal root.
Ganglion Cells - large, nerve cell bodies with centrally located nuclei and prominent nucleoli. The cytoplasm contains abundant Nissl substance.