Neural organization of the third optic neuropil, the lobula, in the highly visual semiterrestrial crab Neohelice granulata.

Autor: Lepore MG; Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), UBA-CONICET, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina., Tomsic D; Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), UBA-CONICET, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina.; Departamento de Fisiología, Biología Molecular y Celular 'Dr Héctor Maldonado', Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina., Sztarker J; Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), UBA-CONICET, Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, Argentina.; Departamento de Fisiología, Biología Molecular y Celular 'Dr Héctor Maldonado', Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
Jazyk: angličtina
Zdroj: The Journal of comparative neurology [J Comp Neurol] 2022 Jul; Vol. 530 (10), pp. 1533-1550. Date of Electronic Publication: 2022 Jan 25.
DOI: 10.1002/cne.25295
Abstrakt: The visual neuropils (lamina, medulla, and lobula complex) of malacostracan crustaceans and hexapods have many organizational principles, cell types, and functional properties in common. Information about the cellular elements that compose the crustacean lobula is scarce especially when focusing on small columnar cells. Semiterrestrial crabs possess a highly developed visual system and display conspicuous visually guided behaviors. In particular, Neohelice granulata has been previously used to describe the cellular components of the first two optic neuropils using Golgi impregnation technique. Here, we present a comprehensive description of individual elements composing the third optic neuropil, the lobula, of that same species. We characterized a wide variety of elements (140 types) including input terminals and lobula columnar, centrifugal, and input columnar elements. Results reveal a very dense and complex neuropil. We found a frequently impregnated input element (suggesting a supernumerary cartridge representation) that arborizes in the third layer of the lobula and that presents four variants each with ramifications organized following one of the four cardinal axes suggesting a role in directional processing. We also describe input elements with two neurites branching in the third layer, probably connecting with the medulla and lobula plate. These facts suggest that this layer is involved in the directional motion detection pathway in crabs. We analyze and discuss our findings considering the similarities and differences found between the layered organization and components of this crustacean lobula and the lobula of insects.
(© 2022 Wiley Periodicals LLC.)
Databáze: MEDLINE
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