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Related Concept Videos

Excitatory and Inhibitory Effects of Neurotransmitters01:29

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When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
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A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Neuronal Communication01:28

Neuronal Communication

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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
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Neurotransmitters01:31

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Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.
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Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
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Optimal Inhibitory-to-Excitatory Ratio Governs Slow and Fast Oscillations for Enhanced Neural Communication.

Jung Young Kim1,2,3, Sang Wan Lee2,4,5,6, Demian Battaglia7,8,9

  • 1Computational Cognitive & Systems Neuroscience Laboratory, Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|November 25, 2025
PubMed
Summary
This summary is machine-generated.

The brain

Keywords:
E/I rationeural computationneural oscillationssynchronization

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Neural oscillations are crucial for brain communication.
  • Simultaneous slow (beta) and fast (gamma) oscillations are poorly understood.
  • Understanding multifrequency oscillations is key to brain function.

Purpose of the Study:

  • Investigate the emergence of multifrequency neural oscillations.
  • Determine the role of synaptic strength ratio in oscillation generation.
  • Explore the impact of multifrequency oscillations on neural communication efficiency.

Main Methods:

  • Utilized a biologically plausible Izhikevich model.
  • Simulated neural networks with varying inhibitory-to-excitatory synaptic strength ratios.
  • Analyzed emergent oscillation frequencies, information capacity, and transmission efficiency.

Main Results:

  • Multifrequency (beta and gamma) oscillations arise within a specific inhibitory-to-excitatory synaptic strength ratio.
  • This regime maximizes information capacity and transmission efficiency.
  • Deviations lead to single-frequency oscillations and reduced communication, mimicking neurological disorders.

Conclusions:

  • The inhibitory-to-excitatory synaptic strength ratio is critical for multifrequency oscillations.
  • Multifrequency oscillations optimize neural communication and information processing.
  • This provides a potential biomarker for impaired neural communication in neurological disorders.