Results 31 to 40 of about 188,649 (338)
Associative properties of structural plasticity based on firing rate homeostasis in recurrent neuronal networks [PDF]
, 2017 Correlation-based Hebbian plasticity is thought to shape neuronal connectivity during development and learning, whereas homeostatic plasticity would stabilize network activity. Here we investigate another, new aspect of this dichotomy: Can Hebbian associative properties also emerge as a network effect from a plasticity rule based on homeostatic ...
arxiv +1 more source
Neuronal Plasticity and Function
Clinical Neuropharmacology, 1993 Neuronal plasticity is a key issue in neuroscience. It is defined as the capability of the neuron to adapt to a changing internal or external environment, to previous experience or to trauma. It appears that during all phases of the individual life span in the nervous system, changes take place that relate to development, degeneration, and regeneration.
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Frontiers in Molecular Neuroscience, 2017 Synaptic cell adhesion molecules represent important targets for neuronal activity-dependent proteolysis. Postsynaptic neuroligins (NLs) form trans-synaptic complexes with presynaptic neurexins (NXs). Both NXs and NLs are cleaved from the cell surface by
Michelle D. Gjørlund +9 more
doaj +1 more source
Astrocytes: orchestrating synaptic plasticity? [PDF]
, 2015 Synaptic plasticity is the capacity of a preexisting connection between two neurons to change in strength as a function of neural activity. Because synaptic plasticity is the major candidate mechanism for learning and memory, the elucidation of its constituting mechanisms is of crucial importance in many aspects of normal and pathological brain ...
arxiv +1 more source
Neuron–glia metabolic coupling and plasticity [PDF]
Journal of Experimental Biology, 2006 SUMMARY The coupling between synaptic activity and glucose utilization(neurometabolic coupling) is a central physiological principle of brain function that has provided the basis for 2-deoxyglucose-based functional imaging with positron emission tomography (PET).
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Biomedicines, 2021 Traumatic brain injury (TBI) is one of the leading causes of mortality and disability worldwide without any validated biomarker or set of biomarkers to help the diagnosis and evaluation of the evolution/prognosis of TBI patients.
Víctor Farré-Alins +20 more
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Dis-inhibitory neuronal circuits can control the sign of synaptic plasticity [PDF]
arXiv, 2023 How neuronal circuits achieve credit assignment remains a central unsolved question in systems neuroscience. Various studies have suggested plausible solutions for back-propagating error signals through multi-layer networks. These purely functionally motivated models assume distinct neuronal compartments to represent local error signals that determine ...
arxiv
THE FUNDAMENTS OF NEURONAL PLASTICITY
Annals of the Russian academy of medical sciences, 2012 Plasticity of the nervous system is determined by the modification of efficacy of synaptic transmission: long- term potentiation and long- term depression. Different modern technical approaches such as: registration of ionic currents in single neuron, molecular- genetic analysis, neurovisualization, and others reveal the molecular mechanisms of ...
M. B. Shtark, V. G. Skrebitskii
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Foldscope as an Innovative Teaching Tool
Education Sciences, 2022 This study deals with the descriptive analysis of the opinion of a pilot group of students at the University of Salamanca about the use of an innovative origami microscope: the Foldscope.
Carlos Hernández-Pérez +1 more
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A Spiking Neuron Synaptic Plasticity Model Optimized for Unsupervised Learning [PDF]
arXiv, 2021 Spiking neural networks (SNN) are considered as a perspective basis for performing all kinds of learning tasks - unsupervised, supervised and reinforcement learning. Learning in SNN is implemented through synaptic plasticity - the rules which determine dynamics of synaptic weights depending usually on activity of the pre- and post-synaptic neurons ...
arxiv