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Verfasst von:Arendt, Detlev [VerfasserIn]   i
Titel:Elementary nervous systems
Verf.angabe:Detlev Arendt
E-Jahr:2021
Jahr:08 February 2021
Umfang:13 S.
Fussnoten:Gesehen am 03.03.2022
Titel Quelle:Enthalten in: Philosophical transactions / B
Ort Quelle:London : Royal Society, 1990
Jahr Quelle:2021
Band/Heft Quelle:376(2021), 1821 vom: 29. März, Artikel-ID 20200347, Seite 1-13
ISSN Quelle:1471-2970
Abstract:The evolutionary origin of the nervous system has been a matter of long-standing debate. This is due to the different perspectives taken. Earlier studies addressed nervous system origins at the cellular level. They focused on the selective advantage of the first neuron in its local context, and considered vertical sensory-motor reflex arcs the first nervous system. Later studies emphasized the value of the nervous system at the tissue level. Rather than acting locally, early neurons were seen as part of an elementary nerve net that enabled the horizontal coordination of tissue movements. Opinions have also differed on the nature of effector cells. While most authors have favoured contractile systems, others see the key output of the incipient nervous system in the coordination of motile cilia, or the secretion of antimicrobial peptides. I will discuss these divergent views and explore how they can be validated by molecular and single-cell data. From this survey, possible consensus emerges: (i) the first manifestation of the nervous system likely was a nerve net, whereas specialized local circuits evolved later; (ii) different nerve nets may have evolved for the coordination of contractile or cilia-driven movements; (iii) all evolving nerve nets facilitated new forms of animal behaviour with increasing body size. - - This article is part of the theme issue ‘Basal cognition: multicellularity, neurons and the cognitive lens’.
DOI:doi:10.1098/rstb.2020.0347
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1098/rstb.2020.0347
 Volltext: https://royalsocietypublishing.org/doi/10.1098/rstb.2020.0347
 DOI: https://doi.org/10.1098/rstb.2020.0347
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:nervous system evolution
 nervous system origins
 neuron evolution
K10plus-PPN:1794525610
Verknüpfungen:→ Zeitschrift

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