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Crustaceans are widely distributed and inhabit very different niches. Many of them are highly visual animals. Nevertheless, the neural composition of crustacean optic neuropils deeper than the lamina is mostly unknown. In particular, semiterrestrial crabs possess a highly developed visual system and display conspicuous visually guided behaviors. A previous study shows that the first optic neuropil, the lamina of the crab Neohelice granulata, possesses a surprisingly high number of elements in each cartridge. Here, we present a comprehensive description of individual elements composing the medulla of that same species. Using Golgi impregnation, we characterized a wide variety of cells. Only considering the class of transmedullary neurons, we describe over 50 different morphologies including small- and large-field units. Among others, we describe a type of centrifugal neuron hitherto not identified in other crustaceans or insects that probably feeds back information to every cartridge in the medulla. The possible functional role of such centrifugal elements is discussed in connection with the physiological and behavioral information on visual processing available for this crab. Taken together, the results reveal a very dense and complex neuropil in which several channels of information processing would be acting in parallel. We further examine our results considering the similarities and differences found between the layered organization and components of this crustacean medulla and the medullae of insects. © 2014 Wiley Periodicals, Inc.


Documento: Artículo
Título:Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crab Neohelice granulata
Autor:Sztarker, J.; Tomsic, D.
Filiación:Laboratorio de Neurobiología de la Memoria, Dpto. Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (IFIBYNE- CONICET), Argentina
Palabras clave:Arthropod; Crustacean; Golgi impregnation; Insect; Transmedullary cells; adult; animal behavior; animal cell; animal tissue; article; cell composition; cell structure; cell type; comparative anatomy; controlled study; crab; functional anatomy; male; medulla oblongata; Neohelice granulata; neuropil; nonhuman; optic nerve; priority journal; terrestrial species; visual system; anatomy and histology; animal; Brachyura; cytology; image processing; medulla oblongata; nerve cell; neuropil; optic nerve; physiology; silver staining; ultrastructure; Animals; Brachyura; Image Processing, Computer-Assisted; Medulla Oblongata; Neurons; Neuropil; Optic Nerve; Silver Staining; Visual Pathways
Página de inicio:3177
Página de fin:3193
Título revista:Journal of Comparative Neurology
Título revista abreviado:J. Comp. Neurol.


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---------- APA ----------
Sztarker, J. & Tomsic, D. (2014) . Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crab Neohelice granulata. Journal of Comparative Neurology, 522(14), 3177-3193.
---------- CHICAGO ----------
Sztarker, J., Tomsic, D. "Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crab Neohelice granulata" . Journal of Comparative Neurology 522, no. 14 (2014) : 3177-3193.
---------- MLA ----------
Sztarker, J., Tomsic, D. "Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crab Neohelice granulata" . Journal of Comparative Neurology, vol. 522, no. 14, 2014, pp. 3177-3193.
---------- VANCOUVER ----------
Sztarker, J., Tomsic, D. Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crab Neohelice granulata. J. Comp. Neurol. 2014;522(14):3177-3193.