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Related Concept Videos

Second-Order Circuits01:17

Second-Order Circuits

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Integrating two fundamental energy storage elements in electrical circuits results in second-order circuits, encompassing RLC circuits and circuits with dual capacitors or inductors (RC and RL circuits). Second-order circuits are identified by second-order differential equations that link input and output signals.
Input signals typically originate from voltage or current sources, with the output often representing voltage across the capacitor and/or current through the inductor. For example, in...
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First-order electrical circuits, which comprise resistors and a single energy storage element - either a capacitor or an inductor, are fundamental to many electronic systems. These circuits are governed by a first-order differential equation that describes the relationship between input and output signals.
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The Y-to-Y Circuit01:19

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In a balanced four-wire wye-to-wye system, the arrangement involves wye-connected sinusoidal voltage sources and loads, connected through a neutral wire that links the neutral nodes of the source and load. The load impedance is connected across each phase of the load. The wye-connected source can be connected to the wye-connected load in four-wire and three-wire arrangements. A three-phase system is considered balanced when the load on each phase is equal, leading to uniform current flow and...
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LC Circuits01:21

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An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
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AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...
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Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Related Experiment Video

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Building a Simple and Versatile Illumination System for Optogenetic Experiments
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Versatility and Flexibility of Cortical Circuits.

Melissa S Haley1, Arianna Maffei1

  • 11 Department of Neurobiology and Behavior, SUNY-Stony Brook, Stony Brook, NY, USA.

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry
|December 29, 2017
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Summary

Cortical circuits exhibit remarkable plasticity, adapting to various life experiences. This review explores the features enabling this adaptability while maintaining overall brain structure.

Keywords:
E/I balancecortexflexibilityneural circuitsplasticitysynapses

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Area of Science:

  • Neuroscience
  • Neuroplasticity
  • Cortical Circuitry

Background:

  • Cortical circuits are inherently adaptable and plastic.
  • Evidence shows adaptation to environmental stimuli, development, learning, and injury.

Purpose of the Study:

  • Discuss features facilitating cortical circuit versatility and flexibility.
  • Explore how experience shapes circuits while preserving organization.

Main Methods:

  • Review of existing literature on cortical circuit organization and plasticity.
  • Analysis of mechanisms supporting both change and stability in neural circuits.

Main Results:

  • Cortical circuits possess features promoting adaptability throughout life.
  • Experience and learning refine circuits without disrupting fundamental organization.

Conclusions:

  • Underlying cortical structure supports experience-dependent plasticity.
  • Mechanisms exist to balance circuit flexibility with stability.