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The Nucleus01:32

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The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Synaptic Plasticity in the Nucleus Accumbens: Lessons Learned from Experience.

Brandon D Turner1, Daniel T Kashima1,2, Kevin M Manz1,2

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|December 28, 2017
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Summary

Synaptic plasticity in the nucleus accumbens (NAc) drives behavioral changes. Understanding these plasticity mechanisms offers insights into learning, memory, and motivational disorders.

Keywords:
Nucleus accumbensgliaglutamateopioidsplasticityserotonin

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Molecular Biology

Background:

  • The nucleus accumbens (NAc) is central to the brain's reward pathway, influencing motivation and action.
  • Synaptic plasticity in the NAc is crucial for adapting behaviors in response to experiences.

Purpose of the Study:

  • To review recent findings on how synaptic strength and plasticity mechanisms in the NAc are altered in models of motivational disorders.
  • To elucidate the molecular underpinnings of experience-dependent plasticity in the NAc.

Main Methods:

  • This review synthesizes data from animal models of addiction, depression, anxiety, and hedonic feeding.
  • Focuses on physiological and behavioral studies examining neuromodulatory signals and plasticity mechanisms within the NAc.

Main Results:

  • Experience-dependent plasticity in the NAc varies based on afferent inputs and cell types over time.
  • Changes in NAc synaptic strength are linked to specific behavioral adaptations.

Conclusions:

  • Understanding NAc plasticity mechanisms is key to comprehending learning and memory.
  • Identifying these mechanisms can reveal maladaptations underlying pathological behaviors and inform therapeutic strategies.