Results 41 to 50 of about 9,287 (251)

Probabilistic versus incremental presynaptic learning in biological plausible synapses [PDF]

open access: yes, 2011
In this paper, the presynaptic rule, a classical rule for hebbian learning, is revisited. It is shown that the presynaptic rule exhibits relevant synaptic properties like synaptic directionality, and LTP metaplasticity (long-term potentiation threshold ...
Andina de la Fuente, Diego   +1 more
core   +2 more sources

Metaplastic breast carcinoma

open access: yesJournal of Osteopathic Medicine, 1996
Abstract Metaplastic breast carcinoma, a rare entity, accounts for only about 0.02% of all breast carcinomas. It involves the transformation of mammary neoplasms into osteoid and chondroid substances. Because of the relatively small patient population and the limited number of controlled studies, there is confusion regarding its ...
D M, Smith   +4 more
openaire   +2 more sources

The computational power of astrocyte mediated synaptic plasticity

open access: yesFrontiers in Computational Neuroscience, 2012
Research in the last two decades has made clear that astrocytes play a crucial role in the brain beyond their functions in energy metabolism and homeostasis.
Rogier eMin   +2 more
doaj   +1 more source

Multiple forms of metaplasticity at a single hippocampal synapse during late postnatal development

open access: yesDevelopmental Cognitive Neuroscience, 2015
Metaplasticity refers to adjustment in the requirements for induction of synaptic plasticity based on the prior history of activity. Numerous forms of developmental metaplasticity are observed at Schaffer collateral synapses in the rat hippocampus at the
Daniel G. McHail, Theodore C. Dumas
doaj   +1 more source

Koniocortex-like network unsupervised learning surpasses supervised results on WBCD breast cancer database [PDF]

open access: yes, 2017
Koniocortex-Like Network is a novel category of Bio-Inspired Neural Networks whose architecture and properties are inspired in the biological koniocortex, the ?rst layer of the cortex that receives information from the thalamus.
Andina De La Fuente, Diego   +2 more
core   +2 more sources

GluN2D NMDA Receptors Gate Fear Extinction Learning and Interneuron Plasticity

open access: yesFrontiers in Synaptic Neuroscience, 2021
The cerebellum is critically involved in the formation of associative fear memory and in subsequent extinction learning. Fear conditioning is associated with a long-term potentiation at both excitatory and inhibitory synapses onto Purkinje cells.
Christophe J. Dubois   +2 more
doaj   +1 more source

Optimal storage and recall with biologically plausible synapses [PDF]

open access: yes, 2011
Synaptic plasticity is widely accepted to underlie learning and memory. Yet, models of associative networks with biologically plausible synapses fail to match brain performance: memories stored in such networks are quickly overwritten by ongoing ...
Cristina Savin, Mate Lengyel
core   +2 more sources

Priming theta burst stimulation enhances motor cortex plasticity in young but not old adults [PDF]

open access: yes, 2017
not availableGeorge M. Opie, Eleni Vosnakis, Michael C.
Opie, G.   +4 more
core   +1 more source

Possible Modulation of the Amygdala on Metaplasticity Deficits in the Hippocampal CA1 Field in Early Postnatally Stressed Rats

open access: yesJournal of Pharmacological Sciences, 2012
Several lines of evidence have shown that early life experiences have a profound impact on fear-related behavior, but the detailed mechanisms are unknown.
Sachiko Hiraide   +8 more
doaj   +1 more source

Selectivity and Metaplasticity in a Unified Calcium-Dependent Model [PDF]

open access: yes, 2003
A unified, biophysically motivated Calcium-Dependent Learning model has been shown to account for various rate-based and spike time-dependent paradigms for inducing synaptic plasticity.
Blais, Brian S.   +3 more
core   +1 more source

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