The Origins of Spinal Ganglia in the Amphibian Tail
Sensory ganglia of the amphibian tail differ from those of the trunk with regard to developmental pattern and ability to regenerate. We set out to examine tail ganglion formation during normal development and regeneration. Ganglion ontogenesis and regeneration in the tail follow a similar sequence beginning with ventral root outgrowth, formation of anlagen whose cells divide and go on to form ganglion neurons and glia and the later appearance of dorsal roots. Because there is no classical neural crest the source of the anlagen cells is not entirely clear. Our findings suggest that cells forming the regenerating ganglion migrate from the ventrolateral part of the regenerating spinal cord, whereas those of the embryonic and larval tail probably come from the tail bud.
KeywordsDorsal Root Neural Tube Neural Crest Neural Crest Cell Ventral Root
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