Relevant bibliographies by topics / Rodents visual system

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  1. Journal articles
  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'Rodents visual system'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Rodents visual system"

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Perez-Vidal, Carlos, Alejandro Garcia, Nicolas Garcia-Aracil, Jose M. Sabater, and Eduardo Fernandez. "SYSTEM FOR MEASURING RODENTS' VISUAL FUNCTION: DESIGN AND IMPLEMENTATION." Biomedical Engineering: Applications, Basis and Communications 26, no. 02 (March 12, 2014): 1450018. http://dx.doi.org/10.4015/s1016237214500185.

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The aim of the work presented in this paper is the design, manufacturing and assembling of a system able to measure rodents' (mice and rats) visual function and to study the evolution of degenerative retina diseases. Measurement of contrast sensitivity and visual acuity is essential to design new drugs and understand mechanisms of visual development to evaluate treatments' effectiveness. Classical methods to study visual perception of animals such as electroretinogram (ERG) or histological analysis are not supplying enough information because connection between eyes and brain is not considered. The system proposed in this work consists of four screens forming a cube with black methacrylate plastic floor and roof. Screens display visual stimulus and the rodent's behaviour (placed over a platform in the middle of the cube) is analized to determine its visual acuity and contrast sensitivity. These visual stimuli are generated from a FPGA board designed in this project. This board has a USB link with a computer and it controls screens via VGA signals. Rodents' behaviour is analized using computer vision algorithms under OpenCV libraries. To test the system, more than 30 mice (C57 and RD10 type) have been used to validate the hardware, the software, the procedure and protocol.
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VAN HOOSER, STEPHEN D., and SACHA B. NELSON. "The squirrel as a rodent model of the human visual system." Visual Neuroscience 23, no. 5 (September 2006): 765–78. http://dx.doi.org/10.1017/s0952523806230098.

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Over the last 50 years, studies of receptive fields in the early mammalian visual system have identified many classes of response properties in brain areas such as retina, lateral geniculate nucleus (LGN), and primary visual cortex (V1). Recently, there has been significant interest in understanding the cellular and network mechanisms that underlie these visual responses and their functional architecture. Small mammals like rodents offer many advantages for such studies, because they are appropriate for a wide variety of experimental techniques. However, the traditional rodent models, mice and rats, do not rely heavily on vision and have small visual brain areas. Squirrels are highly visual rodents that may be excellent model preparations for understanding mechanisms of function and disease in the human visual system. They use vision for navigating in their environment, predator avoidance, and foraging for food. Visual brain areas such as LGN, V1, superior colliculus, and pulvinar are particularly large and well elaborated in the squirrel, and the squirrel has several extrastriate cortical areas lateral to V1. Unlike many mammals, most squirrel species are diurnal with cone-dominated retinas, similar to the primate fovea, and have excellent dichromatic color vision that is mediated by green and blue cones. Owing to their larger size, squirrels are physiologically more robust than mice and rats under anesthesia, and some hibernating species are particularly tolerant of hypoxia that occurs during procedures such as brain slicing. Finally, many basic anatomical and physiological properties in the early visual system of squirrel have now been described, permitting investigations of cellular mechanisms. In this article, we review four decades of anatomical, behavioral, and physiological studies in squirrel and make comparisons with other species.
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Gesnik, Marc, Kevin Blaize, Thomas Deffieux, Jean-Luc Gennisson, José-Alain Sahel, Mathias Fink, Serge Picaud, and Mickaël Tanter. "3D functional ultrasound imaging of the cerebral visual system in rodents." NeuroImage 149 (April 2017): 267–74. http://dx.doi.org/10.1016/j.neuroimage.2017.01.071.

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Francescoli, Gabriel, and Carlos A. Altuna. "Vibrational Communication in Subterranean Rodents." Evolution of Communication 2, no. 2 (December 31, 1998): 217–31. http://dx.doi.org/10.1075/eoc.2.2.04fra.

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Here we discuss different factors that could influence the development of vocal and/or seismic communicative channels in subterranean rodents. We suggest that: 1) Highly social subterranean rodents that do not leave their burrows use essentially vocal signals in the vibrational channel; 2) Solitary and almost permanently fossorial species use vocal signals in short range and seismic signals in long range communication; 3) Other solitary species that leave the burrow system more frequently and that retain good visual capabilities are constrained to use vocal communication only. Also we suggest that seismic communication probably derives from digging activities and, consequently, developed after the acquisition of the subterranean way of life. The first three statements are based on a previously proposed relationship between visual capabilities, hearing capabilities, time spent outside the burrows, social organization and type of vibrational signals used by the species. The fourth statement is based in the correlation found between digging and transporting tools and thumping tools, that are the same across the literature on pertinent genera. Some thumping techniques unique to subterranean animals lead us to propose an evolutionary sequence leading from digging to thumping.
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Scholl, Benjamin, Jagruti J. Pattadkal, Ashlee Rowe, and Nicholas J. Priebe. "Functional characterization and spatial clustering of visual cortical neurons in the predatory grasshopper mouse Onychomys arenicola." Journal of Neurophysiology 117, no. 3 (March 1, 2017): 910–18. http://dx.doi.org/10.1152/jn.00779.2016.

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Mammalian neocortical circuits are functionally organized such that the selectivity of individual neurons systematically shifts across the cortical surface, forming a continuous map. Maps of the sensory space exist in cortex, such as retinotopic maps in the visual system or tonotopic maps in the auditory system, but other functional response properties also may be similarly organized. For example, many carnivores and primates possess a map for orientation selectivity in primary visual cortex (V1), whereas mice, rabbits, and the gray squirrel lack orientation maps. In this report we show that a carnivorous rodent with predatory behaviors, the grasshopper mouse ( Onychomys arenicola), lacks a canonical columnar organization of orientation preference in V1; however, neighboring neurons within 50 μm exhibit related tuning preference. Using a combination of two-photon microscopy and extracellular electrophysiology, we demonstrate that the functional organization of visual cortical neurons in the grasshopper mouse is largely the same as in the C57/BL6 laboratory mouse. We also find similarity in the selectivity for stimulus orientation, direction, and spatial frequency. Our results suggest that the properties of V1 neurons across rodent species are largely conserved. NEW & NOTEWORTHY Carnivores and primates possess a map for orientation selectivity in primary visual cortex (V1), whereas rodents and lagomorphs lack this organization. We examine, for the first time, V1 of a wild carnivorous rodent with predatory behaviors, the grasshopper mouse ( Onychomys arenicola). We demonstrate the cellular organization of V1 in the grasshopper mouse is largely the same as the C57/BL6 laboratory mouse, suggesting that V1 neuron properties across rodent species are largely conserved.
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Nadasdy, Zoltan, T. Peter Nguyen, Ágoston Török, Jason Y. Shen, Deborah E. Briggs, Pradeep N. Modur, and Robert J. Buchanan. "Context-dependent spatially periodic activity in the human entorhinal cortex." Proceedings of the National Academy of Sciences 114, no. 17 (April 10, 2017): E3516—E3525. http://dx.doi.org/10.1073/pnas.1701352114.

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The spatially periodic activity of grid cells in the entorhinal cortex (EC) of the rodent, primate, and human provides a coordinate system that, together with the hippocampus, informs an individual of its location relative to the environment and encodes the memory of that location. Among the most defining features of grid-cell activity are the 60° rotational symmetry of grids and preservation of grid scale across environments. Grid cells, however, do display a limited degree of adaptation to environments. It remains unclear if this level of environment invariance generalizes to human grid-cell analogs, where the relative contribution of visual input to the multimodal sensory input of the EC is significantly larger than in rodents. Patients diagnosed with nontractable epilepsy who were implanted with entorhinal cortical electrodes performing virtual navigation tasks to memorized locations enabled us to investigate associations between grid-like patterns and environment. Here, we report that the activity of human entorhinal cortical neurons exhibits adaptive scaling in grid period, grid orientation, and rotational symmetry in close association with changes in environment size, shape, and visual cues, suggesting scale invariance of the frequency, rather than the wavelength, of spatially periodic activity. Our results demonstrate that neurons in the human EC represent space with an enhanced flexibility relative to neurons in rodents because they are endowed with adaptive scalability and context dependency.
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Salzwedel, A., M. Mauck, J. Kuchenbecker, K. Mancuso, M. Wagner, C. Pawela, A. Hudetz, J. Hyde, M. Neitz, and J. Neitz. "Two S-cone pathways in the visual system that are evolutionarily conserved between rodents and primates." Journal of Vision 9, no. 14 (December 1, 2009): 75. http://dx.doi.org/10.1167/9.14.75.

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Micaelo-Fernandes, Catarina, Joseph Bouskila, Jean-François Bouchard, and Maurice Ptito. "Presence of the Endocannabinoid System in the Inferior Pulvinar of the Vervet Monkey." Brain Sciences 11, no. 6 (June 10, 2021): 770. http://dx.doi.org/10.3390/brainsci11060770.

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The expression of the endocannabinoid (eCB) system, including cannabinoid receptor type 1 (CB1R) and the cannabinoid synthesizing (NAPE-PLD) and degrading (FAAH) enzymes, has been well-characterized in the retina of rodents and monkeys. More recently, the presence of CB1R was localized throughout the dorsal lateral geniculate nucleus of the thalamus of vervet monkeys. Given that the retina projects also to the pulvinar either via a direct projection or via the superior colliculus, it was reasonable to assume that this system would be present therein. The visual pulvinar, namely the inferior pulvinar (PI) region, was delineated with calbindin immunohistochemical staining. Using Western blots and immunofluorescence, we demonstrated that CB1R, NAPE-PLD and FAAH are expressed in the PI of the vervet monkey. Throughout the PI, CB1R was mainly colocalized with VGLUT2-positive axon terminals in the vicinity of calbindin and parvalbumin-positive neurons. NAPE-PLD and FAAH rather colocalized with calbindin over the somatodendritic compartment of PI neurons. Our results suggest that visual information coming from the retina and entering the PI is modulated by the eCB system on its way to the dorsal visual stream. These results provide insights for understanding the role of eCBs in the modulation of visual thalamic inputs and, hence, visual perception.
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Ross, Robert, Lyle Parsons, Ba Son Thai, Richard Hall, and Meha Kaushik. "An IoT Smart Rodent Bait Station System Utilizing Computer Vision." Sensors 20, no. 17 (August 19, 2020): 4670. http://dx.doi.org/10.3390/s20174670.

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Across the world billions of dollars of damage are attributed to rodents, resulting in them being classified collectively as the biggest animal pest in the world. At a commercial scale most pest control companies employ the labour intensive approach of deploying and manually monitoring rodenticide bait stations. In this paper was present, RatSpy, a visual, low-power bait station monitoring system which wirelessly reports both on bait station levels and intruders entering the bait station. The smart bait stations report data back to a custom designed cloud platform. The system performance was evaluated under realistic field conditions (on an active cattle farm) with initial results showing significant potential in terms of reducing manual labour, improving scalability and data.
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de Tejada, Pilar Herreros, and Carmen Muñoz Tedó. "Contrast Sensitivity Function of the Albino Rat Determined Electrophysiologically." Spanish Journal of Psychology 1 (May 1998): 11–17. http://dx.doi.org/10.1017/s1138741600005369.

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Albinism alters the neural projections of the visual system. The authors wondered how this would affect visual function in rodents. They had previously shown that it doesn't alter the luminance threshold. They now explore visual acuity in the albino rat. In this work, they describe its contrast sensitivity function (CSF), as determined electro-physiologically. They recorded cortical visual evoked potentials (VEP) on six albino rats, stimulated by sinusoidal contrast reversal gratings. The curve showed the same characteristics that this function has in other mammals. Compared with the pigmented rat, the albino reached lower sensitivity values and showed a loss of sensitivity at high spatial frequencies. The estimated cut-off was 0.48 c/°, that is, 0.72 log units below the estimated cut-off for the pigmented rat under similar experimental conditions. VEP and behavioral cut-off were very close, the VEP estimation being slightly higher than the behavioral one.
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Dissertations / Theses on the topic "Rodents visual system"

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Colello, Raymond J. "The development of the retinofugal pathway in rodents." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253313.

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Xing, Kai, and 邢锴. "Functional magnetic resonance imaging (fMRI) of rodent visual and auditory system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47849939.

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Functional MRI or Functional Magnetic Resonance Imaging (fMRI) is a type of specialized MRI scan which measures the hemodynamic response related to neural activity in the brain or spinal cord of humans and animals. Due to its relatively low invasiveness, absence of radiation exposure, and relatively wide availability, functional MRI has come to dominate the brain mapping field since the early 1990s. The objective of this thesis work is to develop and apply functional MRI methods at 7 Tesla, for in vivo investigation of rodent visual and auditory system. Firstly, the development of the rat visual pathway was studied by blood oxygenation level–dependent (BOLD) contrast from the time of eyelid opening (P14) to adulthood (P60) in normal rat brain. By studying BOLD-fMRI measurements in the normal brain superior colliculus (SC), we determined that the regional BOLD response undergoes a systematic increase in amplitude especially over the third postnatal week. Secondly, the potential for plasticity of the rodent superior colliculus (SC) was studied using BOLD fMRI. By studying BOLD-fMRI measurements in the SC of three groups of rats (normal, HI-injured with left SC partially damaged and HI-injured with left SC completely damaged), we can evaluate the extent of plastic changes, compensatory and transneuronal plasticity after varying degrees of SC injury. We also applied BOLD-fMRI using very short repetition time (TR) of 0.2s on rats to measure the difference in response temporal dynamics between the SC and LGN, which has not been measured conclusively or with high temporal resolution. The primary finding in this study is that there is an approximately 0.8s difference between the BOLD responses of the rat contralateral SC and LGN to the visual stimuli. In addition, the amplitude of the SC response is larger than that of the LGN. Thirdly, BOLD-fMRI is used to measure the SC hemodynamic responses, in normal adult Sprague-Dawley (SD) rats, during a dynamic visual stimulus similar to those used in long-range apparent motion studies. The stimulation paradigm mimic effective speeds of motion between 7 and 164?/s, the results suggest that the SC is sensitive to slow moving visual stimuli but the hemodynamic response is reduced at higher speeds. Finally, BOLD-fMRI is used to study hemodynamic response temporal dynamics in the superior colliculus (SC) and inferior colliculus (IC) following visual and auditory associated stimulation. Our results show the baselines of SC BOLD signal (in two sides) increase during the ON period of auditory stimulation, which demonstrate that auditory stimulation can increase ROI activation signal intensity in superior colliculus (SC). The previous dominant theory is that individual senses each have separate areas of the brain dedicated to processing each sense, while the individual sense perceptions are integrated together to produce a multi-sensory experience. As a result of new research over the past several years, however, this view has been challenged by studies showing that processing in the visual area of the brain can be directly influenced by hearing and touch. All these discoveries represent a new view of how the brain is actually organized.
published_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy
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Blaize, Kevin. "Cartographier le traitement de l'information visuelle cérébrale grâce aux ultrasons fonctionnels." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS114.

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Le système visuel cérébral inclut le corps genouillé latéral, le colliculus supérieur et le cortex visuel. Ces structures ont été étudiées depuis les années 50 et cette étude a été possible par l’apparition de l’imagerie par résonnance magnétique fonctionnelle ainsi que par différentes techniques optiques. Pour évaluer la résolution spatiotemporelle de la technique d’imagerie ultrasonore, nous avons mesuré les réponses visuelles des structures cérébrales sur le rat anesthésié en étudiant leur dynamique respective soit sur un seul plan, soit par reconstruction tridimensionnelle. Après avoir validé cette approche technologique sur le petit animal, nous avons appliqué cette technique sur le cortex visuel du primate non-humain éveillé. Ainsi, nous avons pu reconstruire les cartes rétinotopiques du cortex visuel en surface mais aussi en profondeur. Nous avons mis en évidence, les bandes de dominance oculaire dans V1. En accord avec certaines données anatomiques, cette mesure fonctionnelle suggère la présence d’une dominance oculaire au-delà de la couche 4, dans les couches 3 et 5 de V1. En conclusion, ces travaux de thèse ont permis de montrer l’intérêt spécifique de l’imagerie fonctionnelle par ultrasons sur le rongeur et le primate non-humain, anesthésiés et vigiles. Cette nouvelle technique d'imagerie permet la visualisation fonctionnelle à haute résolution spatiotemporelle en profondeur des aires visuelles. Cette illustration sur le système visuel met en lumière l’intérêt prometteur du déploiement de cette technique pour l’exploration fonctionnelle de structures inaccessibles en imagerie optique de surface et en dessous de la résolution de l’IRMf
In the brain, the visual system includes the Lateral Geniculate Nucleus, the Superior Colliculus and the visual cortex. These structures have been studied since the 50’s and these studies have relied on functional MRI but also on the development of functional surface microscopic imaging techniques. To examine the spatiotemporal resolution of the ultrafast ultrasound imaging technique, we measured visual responses in in the cerebral structures on anesthetized rats in one imaging plan or with a 3D reconstruction. After having validated our technology on rodents, we have applied the technique to awake non-human primate visual cortex. We reconstructed the retinotopic maps of visual cortex, at the surface and in depth. In addition, we could resolve the ocular dominance columns within V1, which represent a major functional structuration in the primary visual cortex. This functional observation suggests the presence of ocular dominance beyond layer 4 in layers 3 and 5 of V1. In conclusion, this thesis work has demonstrated that the functional ultrafast ultrasound imaging can measure activity in the visual system for both rats and non-human primates, anesthetized and awake. This new imaging technique can provide functional measures with a high spatiotemporal resolution in the deep tissue. This illustration on the visual system highlights the potential of the technique to measure functional units not accessible to optical surface analysis and below the resolution of fMRI. Future studies will have to define if this technique can still provide a better resolution than fMRI in deeper structures than 1cm
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Bláhová, Veronika. "Neurální substrát magnetické kompasové orientace u myši C57BL/6J." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-337647.

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The ability to perceive the Earth's magnetic field has been demonstrated in a variety of animals, including representatives of all five classes of vertebrates. The physiological mechanisms underlying magnetic field sensation, however, remain largely unknown. Behavioral, physiological, neuroethological studies and studies using early response genes as neuronal activation markers indicated that a major role in the perception and processing of magnetic information play trigeminal, vestibular and visual systems. Subsequently, magnetic information seem to be integrated with multimodal sensory and motor information within the hippocampal-entorhinal system. In the majority of studies, however, birds have been used as model organisms. In this work I analyzed the neural substrate of magnetic compass orientation in the mouse strain C57BL/6J using markers c-Fos and Egr1. I found that all the aforementioned systems contain neurons responsive to the experimental magnetic fields. This finding demonstrates a complex processing of the magnetic information at level of the central nervous system.
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Book chapters on the topic "Rodents visual system"

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Lent, Roberto. "Different Developmental Strategies of the Telencephalic Commissures: A Comparison between the Ontogeneses of Visual Callosal Connections and of Olfactory Commissural Connections in Rodents." In The Visual System from Genesis to Maturity, 131–46. Boston, MA: Birkhäuser Boston, 1992. http://dx.doi.org/10.1007/978-1-4899-6726-8_10.

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Lund, Raymond D., Jeffrey D. Radel, and Kathleen T. Yee. "Experimental Manipulation of the Developing Rodent Visual System." In Formation and Regeneration of Nerve Connections, 72–90. Boston, MA: Birkhäuser Boston, 1993. http://dx.doi.org/10.1007/978-1-4899-6707-7_7.

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Fawcett, James W. "Refinement of Topographic Projections in the Rodent, Avian, Amphibian, and Fish Visual Systems." In Formation and Regeneration of Nerve Connections, 91–101. Boston, MA: Birkhäuser Boston, 1993. http://dx.doi.org/10.1007/978-1-4899-6707-7_8.

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Van Hooser, Stephen D., J. Alexander Heimel, and Sacha B. Nelson. "Functional cell classes and functional architecture in the early visual system of a highly visual rodent." In Progress in Brain Research, 127–45. Elsevier, 2005. http://dx.doi.org/10.1016/s0079-6123(05)49010-x.

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Conference papers on the topic "Rodents visual system"

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Chan, Kevin C., Matthew M. Cheung, Kyle K. Xing, Iris Y. Zhou, April M. Chow, Condon Lau, Kwok-fai So, and Ed X. Wu. "In vivo MRI study of the visual system in normal, developing and injured rodent brains." In 2010 32nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2010). IEEE, 2010. http://dx.doi.org/10.1109/iembs.2010.5627884.

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