Atomistic deformation simulations in the nominally elastic regime are performed for a model binary glass with strain rates as low 104/s (corresponding to 0.01 shear per 1 µs). A rate dependent softening due micro-plasticity is observed, which mediated by thermally-activated localized structural transformations (LSEs). closer inspection of atomic-scale structure indicates material response disti...

Growing experimental evidence shows that both homeostatic and Hebbian synaptic plasticity can be expressed presynaptically as well as postsynaptically. In this review, we start by discussing this evidence and methods used to determine expression loci. Next, we discuss the functional consequences of this diversity in pre- and postsynaptic expression of both homeostatic and Hebbian synaptic plast...

objective(s): there are few reports have demonstrated the effect of a change-in-light experience on the structure and function of hippocampus. a change-in-light experience also affects the circadian pattern of melatonin secretion. this study aimed to investigate developmental effect of exogenous melatonin on synaptic plasticity of hippocampus of light deprived rats. materials and methods: the e...

neuroplasticity is the brain's ability to reorganize itself by forming new neural connections throughout life. neuroplasticity allows the neurons in the brain to compensate injury and disease and to adjust their activities in response to new situations or to changes in their environment. at the other side, it is now well established that neuronal function is strongly influenced by both cen...

Synaptic plasticity, the putative basis of learning and memory formation, manifests in various forms and across different timescales. Here we show that the interaction of Hebbian homosynaptic plasticity with rapid non-Hebbian heterosynaptic plasticity is, when complemented with slower homeostatic changes and consolidation, sufficient for assembly formation and memory recall in a spiking recurre...

The ability of a single genotype to generate different phenotypes in disparate environments is termed phenotypic plasticity, which reflects the interaction of genotype and environment on developmental processes. However, there is controversy over the definition of plasticity genes. The gene regulation model states that plasticity loci influence trait changes between environments without alterin...

stabilization, alter and improvement of engineering properties of soil are for providing predetermined goals. the most important aim of soil stabilization is increasing long term soil strength, but in very wet and loos lands the other aim of soil stabilization, is to decrease plasticity characteristic of soil, which are tested by atterberg limits tests. since the road soils of namkhane district...

background: the rodent somatosensory barrel cortex is an ideal model to examine the effect of experience-dependent plasticity on developing brain circuitry. sensory deprivation such as whisker deprivation may affect neuroanatomical aspects of the brain during developmental processes. the present study designed to investigate the possible effects of whisker deprivation on the morphometric charac...

long-term potentiation (ltp) is a reflection of synaptic plasticity that induced by specific patterns of synaptic activity and has an important role in learning and memory. the first clue of the potential role of glutamate receptors in ltp was in 1991 with the observation that the mglur agonists 1-amino-1, 3-cyclopentanedicarboxylic acid (acpd), increased ltp. studies have shown that acpd induc...