| 词汇 | plasticity |
| 释义 | plasticity noun[ U ] uk /plæsˈtɪs.ə.ti/ us /plæsˈtɪs.ə.t̬i/ the quality of being soft enough to be changed into a new shape可塑性 Flexible, loose and yielding adrift bendable bendy ductile ductility flowing jointed lax limply limpness ragdoll relax rubbery semi-flexible slacken uncompressed unconstricted unstayed unstuck yielding Examples of plasticityplasticity Long-term potentiation and experience-dependent plasticity in visual cortex are coregulated by age and experience. In fin-de-siecle cultural discourse, women, through their 'materiality', are endowed with 'unlimited plasticity'. The evidence for synaptic plasticity in adult primary visual cortex is growing rapidly and is paralleled by work in other adult sensory cortices as well. By contrast, learning a complex motor skill induces plasticity in motor areas of the brain such as the motor and cerebellar cortices. In such a case, hardwiring the neuronal machinery in a task-specific way may be the superior adaptation strategy compared with an experiencedependent neuronal plasticity. Effects of morphological plasticity and differences in host plant preferences aside; the situation is further complicated by mating differences between biotypes. The prospect of activitydependent plasticity in these neuron-glial signalling pathways has, however, received little attention. Adaptations of receptor-couples signal transduction pathways underlying stress- and drug-induced neural plasticity. It is possible to relate properties and mechanisms of long-term synaptic plasticity in the mammalian brain to learning and memory. Such neuronal networks show temporal dynamics and may engage in synaptic plasticity or organize into coherent states. All plasticity, the work ends with a stage essentially emptied, but for a dog, looking like a stray, sniffing for carrion. So, brain modifiability (plasticity) is essentially global, and this must be so in evolution because it is so in development. In this context, we describe recent experiments linking adult neurogenesis to long-term synaptic plasticity in the hippocampal dentate gyrus. A developmental affective neuroscience approach may clarify the factors underlying plasticity in the neural circuitry involved in distinct aspects of emotional behavior. The cellular mechanisms that underlie structural plasticity in the hypothalamo-neurohypophysial system remain to be determined. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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