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Related Concept Videos

Neural Circuits01:25

Neural Circuits

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...
Neural Regulation01:37

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
Propagation of Action Potentials01:23

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...

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Related Experiment Video

Updated: Jun 22, 2026

Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks
11:18

Closed-loop Neuro-robotic Experiments to Test Computational Properties of Neuronal Networks

Published on: March 2, 2015

Reliable neuromodulation from circuits with variable underlying structure.

Rachel Grashow1, Ted Brookings, Eve Marder

  • 1Volen Center and Biology Department, Brandeis University, Waltham, MA 02454-9110, USA.

Proceedings of the National Academy of Sciences of the United States of America
|June 26, 2009
PubMed
Summary
This summary is machine-generated.

Neuromodulation can reliably control neural network function even with varying synaptic strengths and conductances. Serotonin and oxotremorine expanded stable network activity, though individual responses varied.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Network performance can be similar despite variable network parameters.
  • Neuromodulation's reliability across individuals with different neural parameters is questioned.

Purpose of the Study:

  • Investigate neuromodulation reliability in networks with diverse synaptic strengths and intrinsic conductances.
  • Examine the effects of serotonin and oxotremorine on network behavior.

Main Methods:

  • Constructed 2-cell reciprocally inhibitory networks using dynamic clamp with crab gastric mill neurons.
  • Varied artificial inhibitory synapse strength (g(syn)) and artificial I(h) conductance (g(h)).
  • Mapped network output across parameter space in normal saline and with neuromodulators.

Main Results:

  • Stable alternating bursting was observed across a range of g(syn) and g(h) values.
  • Serotonin and oxotremorine increased the parameter regions supporting alternating bursting.
  • Neuromodulators generally increased burst frequency, but some parameter sets showed decreased frequency.

Conclusions:

  • Neuromodulation can be reliable across networks with different intrinsic properties.
  • Pharmacological treatments may yield variable individual responses due to underlying network parameter differences.
  • Findings inform understanding of nervous system evolution and drug efficacy.