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Related Concept Videos

Neural Circuits01:25

Neural Circuits

3.2K
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.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
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Radial System Protection01:23

Radial System Protection

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Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
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Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
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Zones of Protection01:16

Zones of Protection

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In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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First-Order Circuits01:15

First-Order Circuits

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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.
One common example of a first-order circuit is the RC (resistor-capacitor) circuit. These circuits are used in relaxation oscillators such as neon lamp oscillator circuits. When voltage is...
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Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings
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Electrophysiological and Morphological Characterization of Neuronal Microcircuits in Acute Brain Slices Using Paired Patch-Clamp Recordings

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Do Cortical Circuits Need Protecting from Themselves?

Andrew J Trevelyan1

  • 1Institute of Neuroscience, Medical School, Framlington Place, Newcastle upon Tyne NE2 4HH, UK.

Trends in Neurosciences
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Summary
This summary is machine-generated.

The brain

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Area of Science:

  • Neuroscience
  • Cortical Function
  • Neurological Disorders

Background:

  • Hippocampal and neocortical networks are susceptible to seizures induced by drugs, altered cerebrospinal fluid (CSF) ionic composition, or electrical stimulation.
  • Understanding the mechanisms underlying seizure susceptibility is crucial for comprehending neurological disorders and cortical function.

Purpose of the Study:

  • To review features of cortical networks that influence excitability and susceptibility to seizures.
  • To identify factors that protect the healthy brain from hyperexcitability.

Main Methods:

  • Review of existing research on cortical network excitability and seizure generation.
  • Examination of cellular- and circuit-level properties contributing to or preventing hyperexcitability.

Main Results:

  • Cortical networks possess features that can be manipulated to induce seizures.
  • Specific network characteristics bias activity towards or away from hyperexcitability.

Conclusions:

  • Rapidly responsive interneuron networks play a key role in preventing seizures in the healthy brain.
  • Cellular and circuit-level mechanisms within interneuron networks contribute to maintaining cortical stability and preventing hyperexcitability.