Letteratura scientifica selezionata sul tema "Noyau de tangente neuronale"
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Articoli di riviste sul tema "Noyau de tangente neuronale":
Pimentel, G., P. C. Even, N. Nadkarni, D. Azzout-Marniche, G. Fromentin, D. Tomé e C. Chaumontet. "P124 Influence de l’introduction d’un choix alimentaire sur l’évolution du poids, la composition corporelle et la réponse neuronale du noyau accumbens chez les rats sensibles ou résistants à l’obésité induite par un régime gras". Cahiers de Nutrition et de Diététique 48 (dicembre 2013): S117. http://dx.doi.org/10.1016/s0007-9960(13)70482-6.
Pimentel, G., P. C. Even, N. Nadkarni, D. Azzout-Marniche, G. Fromentin, D. Tomé e C. Chaumontet. "P124 Influence de l’introduction d’un choix alimentaire sur l’évolution du poids, la composition corporelle et la réponse neuronale du noyau accumbens chez les rats sensibles ou résistants à l’obésité induite par un régime gras". Nutrition Clinique et Métabolisme 27 (dicembre 2013): S117. http://dx.doi.org/10.1016/s0985-0562(13)70456-4.
Tesi sul tema "Noyau de tangente neuronale":
Mallik, Mohammed Tariqul Hassan. "Electromagnetic Field Exposure Reconstruction by Artificial Intelligence". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. https://pepite-depot.univ-lille.fr/ToutIDP/EDENGSYS/2023/2023ULILN052.pdf.
The topic of exposure to electromagnetic fields has received muchattention in light of the current deployment of the fifth generation(5G) cellular network. Despite this, accurately reconstructing theelectromagnetic field across a region remains difficult due to a lack ofsufficient data. In situ measurements are of great interest, but theirviability is limited, making it difficult to fully understand the fielddynamics. Despite the great interest in localized measurements, thereare still untested regions that prevent them from providing a completeexposure map. The research explored reconstruction strategies fromobservations from certain localized sites or sensors distributed inspace, using techniques based on geostatistics and Gaussian processes.In particular, recent initiatives have focused on the use of machinelearning and artificial intelligence for this purpose. To overcome theseproblems, this work proposes new methodologies to reconstruct EMFexposure maps in a specific urban area in France. The main objective isto reconstruct exposure maps to electromagnetic waves from some datafrom sensors distributed in space. We proposed two methodologies basedon machine learning to estimate exposure to electromagnetic waves. Forthe first method, the exposure reconstruction problem is defined as animage-to-image translation task. First, the sensor data is convertedinto an image and the corresponding reference image is generated using aray tracing-based simulator. We proposed an adversarial network cGANconditioned by the environment topology to estimate exposure maps usingthese images. The model is trained on sensor map images while anenvironment is given as conditional input to the cGAN model.Furthermore, electromagnetic field mapping based on the GenerativeAdversarial Network is compared to simple Kriging. The results show thatthe proposed method produces accurate estimates and is a promisingsolution for exposure map reconstruction. However, producing referencedata is a complex task as it involves taking into account the number ofactive base stations of different technologies and operators, whosenetwork configuration is unknown, e.g. powers and beams used by basestations. Additionally, evaluating these maps requires time andexpertise. To answer these questions, we defined the problem as amissing data imputation task. The method we propose takes into accountthe training of an infinite neural network to estimate exposure toelectromagnetic fields. This is a promising solution for exposure mapreconstruction, which does not require large training sets. The proposedmethod is compared with other machine learning approaches based on UNetnetworks and conditional generative adversarial networks withcompetitive results
Hadj-Idris, Farah. "Activité neuronale du globus pallidus et du noyau subthalamique pendant l’inhibition motrice". Thesis, Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS543.pdf.
Response inhibition is crucial for adaptive behavior that allows the deliberate selection of one action from many. Inhibition is reactive after the identification of specific stimuli, or proactive in the absence of stimuli and when triggered by a specific context. Interactions between cortex and basal ganglia (BG) are important for implementing reactive and proactive inhibition. We recorded neurons in the external and internal segments of the globus pallidus (GPe and GPi) as well as in the subthalamic nucleus (STN) in monkeys during a Go/No Go task. In the GPe, we identified four types of neurons based on electrophysiological properties: two types exhibiting high-frequency discharge, with spontaneous pauses in activity (GPe-HFD-p) or without (GPe-HFD), and two types exhibiting low-frequency discharge, those exhibiting spontaneous bursting (GPe-LFD-b) and those that did not (GPe-LFD). GPi neurons were relatively homogenous, exhibiting high-frequency discharge without spontaneous pausing (GPi-HFD). According to their patterns of activities, we classified STN neurons into four classes: positive, negative, polyphasic positive and polyphasic negative. All neuronal types of GPe, GPi and STN encode reactive, proactive inhibition, direction and execution of movement. We identified one subtype of pallidal neuron (GPe-LFD-b) and one subtype of STN neuron (polyphasic negative) that responded rapidly to the stimulus signalling the need to withhold response (No Go). These neurons may be specifically involved in action restraint by activating motor programs related to maintaining current motor state despite the urge to respond
Hoyk, Zsófia. "Ösztradiol által kiváltott szinaptikus átrendeződés mechanizmusának vizsgálata patkány nucleus arcuatus-ban". Bordeaux 2, 2001. http://www.theses.fr/2001BOR28852.
Robbe, David. "Régulation et plasticité de la transmission synaptique dans le noyau accumbens. Modulation par les drogues addictives". Montpellier 2, 2002. http://www.theses.fr/2002MON20076.
Bosch, Clémentine. "Transmission et plasticité au sein de la voie hyperdirecte des ganglions de la base". Paris 6, 2011. http://www.theses.fr/2011PA066232.
Derambure, Philippe. "Etude electrophysiologique in vitro des mecanismes neuronaux determinant la fonction circadienne des noyaux suprachiasmatiques de l'hypothalamus ; place de la thermosensibilite neuronale". Lille 2, 1997. http://www.theses.fr/1997LIL2T008.
Zennou-Azogui, Yoh'i. "Compensation vestibulaire : substitution visuelle dans le noyau de Deiters chez le chat éveillé : période sensible et rôle de l'activité visuomotrice". Aix-Marseille 1, 1993. http://www.theses.fr/1993AIX11051.
Saliba, Layal. "Etude de la transmission glutamatergique et des effets de l'ozone dans le noyau du tractus solitaire de rat adulte". Aix-Marseille 2, 2009. http://www.theses.fr/2009AIX20722.
This work joins within the framework of studies about the mechanisms of integration of the visceral information in response to environmental disturbances. In the first part of this work, our results suggest that neurons of the nucleus of tractus solitarii (NTS) could use different neurotransmission modes according to their projection pathway. In neurons involved in vital reflexes such as those regulating respiration, the lack of important iA current, as well as a synaptic transmission which depends mostly on AMPA receptors with less accessible NMDA receptors, would induce a very precise and highly reliable treatment of the information. On the contrary, in neurons implicated in the elaboration of visceral sensations such as respiratory distress, the presence of an important iA current, as well as a synaptic transmission involving perisynaptic NMDA receptors, would allow an easy modulation of the neurotransmission and a global activation of some brain areas. In the second part of this work, we show that ozone inhalation induces a neuronal activity in regions of adult rat NTS receiving pulmonary afferences, at doses causing a lung inflammation comparable to that provoked by atmospheric peaks of pollution to certain humans. Pulmonary inflammation and neuronal activity inferred by ozone inhalation increase from the first hours of exposure and remain high as long as stimuli is present. The continuation of this work aims to determine if ozone induces a neuronal inflammation, and to characterize its effects on the neurotransmission particularly in the NTS
Sargolini, Francesca. "Rôle du noyau accumbens dans la mémoire spatiale et non spatiale : implications des récepteurs glutamatergiques NMDA et AMPA". Toulouse 3, 2002. http://www.theses.fr/2002TOU30207.
Panatier, Aude. "Rôle des astrocytes dans le contrôle de l'activité des récepteurs NMDA et dans laplasticité synaptique à long terme dans le noyau supraoptique chez le rat". Bordeaux 2, 2006. http://www.theses.fr/2006BOR21384.
Increasing evidence indicates that beside pre- and postsynaptic neuronal elements, astrocyte is the third element of the synapse. Indeed, it can detect, integrate and modulate synaptic signals. My work focuses on the role of astrocytes in glutamatergic synaptic transmission and more precisely in NMDA receptor (NMDAR) activity. The NMDAR is a key player in excitatory transmission. I showed that NMDARs are responsible for the induction of long-term synaptic plasticity in hypothalamic supraoptic nuclei (SON). It is known that their activation depends on the binding of both, glutamate, and a co-agonist like glycine or D-serine. Interestingly, D-serine is synthezized and released by astrocyte. Thus, this amino acid offers a unique opportunity to test the influence of astrocytic coverage of synapses on glutamatergic synaptic transmission. To this end, I took advantage of the extensive reduction of astrocytic ensheathing of neurons and synapses that SON undergoes during lactation. By combining electrophysiological recordings with biochemistry and immunochemistry, I provided direct evidence that astrocytic D-serine is the only endogenous co-agonist of NMDARs in the SON. Thus, the activation of SON NMDARs requires the binding of glutamate and D-serine, but not glycine. Moreover, by comparing NMDAR activity under different astrocytic coverage of neurons and synapses, I found that astrocytes, by releasing D-serine at glutamatergic synapses, control not only the level of activation of synaptic NMDARs but also, the activity-dependence of long-term synaptic changes. Such a mechanism might be extended to all brain regions where D-serine is present. My work clearly identifies astrocytes as key players in signalling and storage of information in the brain
Libri sul tema "Noyau de tangente neuronale":
Takao, Kumazawa, Kruger Lawrence e Mizumura Kazue, a cura di. The polymodal receptor: A gateway to pathological pain. Amsterdam: Elsevier, 1996.
(Editor), T. Kumazawa, L. Kruger (Editor) e K. Mizumura (Editor), a cura di. The Polymodal Receptor - A Gateway to Pathological Pain (Progress in Brain Research). Elsevier Science, 1996.