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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
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Different Forms of Plasticity Interact in Adult Humans.

İzel D Sarı1, Claudia Lunghi2

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Neuroplasticity in the adult brain is not entirely modular. Simultaneous visual and motor tasks impair visual plasticity, suggesting global regulation of brain plasticity to maintain balance.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroplasticity Research

Background:

  • Neuroplasticity, the brain's ability to change, is highest in development and declines with age, particularly in sensory areas.
  • Motor and prefrontal cortices maintain lifelong plasticity, suggesting regional differences and potentially modular plasticity mechanisms.
  • While shared mechanisms like GABAergic inhibition link visual and motor plasticity, their direct interaction remains unexplored.

Purpose of the Study:

  • To investigate the interaction between visual and motor plasticity when elicited simultaneously in adult humans.
  • To examine the effect of simultaneous working memory activation on visual plasticity.

Main Methods:

  • Adult human participants underwent simultaneous induction of visual and motor plasticity.
  • Visual plasticity was assessed during concurrent working memory tasks.
  • Behavioral measures were used to quantify plasticity in visual and motor cortices.

Main Results:

  • Simultaneous visual and motor plasticity induction impaired visual plasticity while sparing motor plasticity.
  • Concurrent activation of working memory and visual plasticity also led to visual plasticity impairment.
  • These findings reveal unilateral interactions between visual, working memory, and motor plasticity.

Conclusions:

  • Local neuroplasticity in distinct brain systems may be subject to global regulatory mechanisms.
  • These global regulations might serve to preserve overall brain homeostasis.
  • The study challenges a strictly modular view of neuroplasticity, highlighting interconnected regulatory processes.