Retinofugal Projections Into Visual Brain Structures in the Bat Artibeus planirostris: A CTb Study
| Autor: | Joacil Germano Soares, Judney Cley Cavalcante, Costa Msmo, de Góis Morais Pla, Jeferson S. Cavalcante, Leite, Ladd Fvl, Barros Mas, Santana Mad, Expedito Silva do Nascimento, Medeiros Hha |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Optic tract retinal projections Neuroscience (miscellaneous) Sensory system Lateral geniculate nucleus chiropteran lcsh:RC321-571 lcsh:QM1-695 phyllostomidae 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine medicine Pretectal area lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry Artibeus planirostris biology Superior colliculus pretectal region lcsh:Human anatomy Anatomy biology.organism_classification 030104 developmental biology medicine.anatomical_structure Cytoarchitecture visual system cholera toxin subunit b Nucleus 030217 neurology & neurosurgery |
| Zdroj: | Frontiers in Neuroanatomy, Vol 12 (2018) |
| ISSN: | 1662-5129 |
| Popis: | A well-developed visual system can provide significant sensory information to guide motor behavior, especially in fruit-eating bats, which usually use echolocation to navigate at high speed through cluttered environments during foraging. Relatively few studies have been performed to elucidate the organization of the visual system in bats. The present work provides an extensive morphological description of the retinal projections in the subcortical visual nuclei in the flat-faced fruit-eating bat (Artibeus planirostris) using anterograde transport of the eye-injected cholera toxin B subunit (CTb), followed by morphometrical and stereological analyses. Regarding the cytoarchitecture, the dorsal lateral geniculate nucleus (dLGN) was homogeneous, with no evident lamination. However, the retinal projection contained two layers that had significantly different marking intensities and a massive contralateral input. The superior colliculus (SC) was identified as a laminar structure composed of seven layers, and the retinal input was only observed on the contralateral side, targeting two most superficial layers. The medial pretectal nucleus (MPT), olivary pretectal nucleus (OPT), anterior pretectal nucleus (APT), posterior pretectal nucleus (PPT) and nucleus of the optic tract (NOT) were comprised the pretectal nuclear complex (PNT). Only the APT lacked a retinal input, which was predominantly contralateral in all other nuclei. Our results showed the morphometrical and stereological features of a bat species for the first time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|