Discovery of Sympathetic Neurons Originating from the Neural Crest in a Jawless Vertebrate, Challenging the Prevailing Belief about the Evolution of the Sympathetic Nervous System
The presence of trunk sympathetic neurons in the sea lamprey, a jawless vertebrate, challenges the prevailing belief that sympathetic ganglia arose only in jawed vertebrates, suggesting that a rudimentary sympathetic nervous system may have been characteristic of the earliest vertebrates.