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NUITFRANCE - Bibliothèque - Fiche bibliographique
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► Fiche bibliographique
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Document " Adaptations for nocturnal and diurnal vision in the hawkmoth lamina "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit naturelle - Sens et orientation du vivant |
Groupe biologique : |
Invertébrés terrestres |
Auteur(s) : |
STÖCKL A.L. RIBI W.A. WARRANT E.J.
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Date de publication : |
Juillet 2015 |
Langue : |
English/Anglais |
Nom du périodique : |
Journal of Comparative Neurology |
Précisions : |
In press |
Lien contenu/source : |
http://onlinelibrary.wiley.com/doi/10.1002/cne.238... |
DOI : |
10.1002/cne.23832 |
Mots-clefs : |
Compound eye Hawkmoths Insect vision Lamina Lamina monopolar cells Nocturnal vision RRID:AB_2315426 Spatial summation
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Citation courte : |
Stöckl et al. (2015) |
Citation complète (format NuitFrance) : |
STÖCKL A.L., RIBI W.A. & WARRANT E.J. (2015). Adaptations for nocturnal and diurnal vision in the hawkmoth lamina. Journal of Comparative Neurology. In press. |
Résumé du document : |
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Animals use vision over a wide range of light intensities, from dim starlight to bright sunshine. For animals active in very dim light the visual system is challenged by several sources of visual noise. Adaptations in the eyes, as well as in the neural circuitry, have evolved to suppress the noise and enhance the visual signal, thereby improving vision in dim light. Among neural adaptations, spatial summation of visual signals from neighboring processing units is suggested to increase the reliability of signal detection and thus visual sensitivity. In insects, the likely neural candidates for carrying out spatial summation are the lamina monopolar cells (LMCs) of the first visual processing area of the insect brain (the lamina). We have classified LMCs in three species of hawkmoths with considerably different activity periods but very similar ecology—the diurnal Macroglossum stellatarum, the nocturnal Deilephila elpenor and the crepuscular-nocturnal Manduca sexta. Using this classification, we investigated the anatomical adaptations of hawkmoth LMCs suited for spatial summation. We found that specific types of LMCs have dendrites extending to significantly more neighboring cartridges in the two nocturnal and crepuscular species than in the diurnal species, making these LMC types strong candidates for spatial summation. Moreover, while the absolute number of cartridges visited by the LMCs differed between the two dim-light species, their dendritic extents were very similar in terms of visual angle, possibly indicating a limiting spatial acuity. The overall size of the lamina neuropil did not correlate with the size of its LMCs.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2015 |
Identifiant NuitFrance : |
NF-BIBLI-1416 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1416 |
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