It has been demonstrated by us and other authors that first nervous cells in developing larvae from various trochozoan groups differentiate at the periphery. These pioneer neurons are distinguished by the set of characters. They are located outside the forming central ganglia; outgrowing fibers of central neurons use their processes as a “scaffolding” transmitter expression in these neurons is transient. On the one hand, pioneer neurons mark the “frame” of the adult nervous system and thus play a limiting role. On the other hand, pioneering navigation provides possible mechanisms for evolutional plasticity of the nervous system in adults. In addition, pioneer neurons can underlie functional adaptation of trochophore animals, which minimizes fitness decrease during the transition from the larval to the adult form during metamorphosis.
Russian Journal of Developmental Biology – Springer Journals
Published: Dec 2, 2010
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