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Related Concept Videos

Synaptic Signaling01:12

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Long-term Potentiation01:35

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Synaptic Signaling01:09

Synaptic Signaling

Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Long-term Potentiation01:25

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when presynaptic neurons...
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...
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

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Related Experiment Video

Updated: May 12, 2026

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond
08:08

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Published on: June 24, 2015

Locally dynamic synaptic learning rules in pyramidal neuron dendrites.

Christopher D Harvey1, Karel Svoboda

  • 1Janelia Farm Research Campus, HHMI, Ashburn, Virginia 20147, USA.

Nature
|December 22, 2007
PubMed
Summary
This summary is machine-generated.

Long-term potentiation (LTP) at individual synapses lowers the threshold for plasticity at neighboring synapses. This clustered plasticity in the hippocampus may support memory binding in neural networks.

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Last Updated: May 12, 2026

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Published on: June 24, 2015

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Published on: May 18, 2020

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Ballistic Labeling of Pyramidal Neurons in Brain Slices and in Primary Cell Culture

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Area of Science:

  • Neuroscience
  • Synaptic Plasticity
  • Memory Research

Background:

  • Long-term potentiation (LTP) is crucial for learning and memory.
  • While LTP is typically input-specific, neural models suggest interactions between nearby synapses.

Purpose of the Study:

  • To investigate interactions between plasticity at neighboring synapses in mouse hippocampal pyramidal cells.
  • To determine if LTP at one synapse affects LTP induction at adjacent synapses.

Main Methods:

  • Induction of input-specific LTP using two-photon glutamate uncaging or synaptic stimulation.
  • Application of subthreshold stimuli to neighboring spines post-LTP induction.
  • Measurement of synaptic potentiation and spine enlargement.
  • Analysis of spike-timing-dependent LTP intervals within dendritic neighborhoods.

Main Results:

  • LTP at individual synapses reduced the potentiation threshold at neighboring synapses.
  • Subthreshold stimuli induced robust LTP and spine enlargement at neighboring spines after initial LTP.
  • LTP induction broadened the effective time window for spike-timing-dependent LTP.
  • This effect lasted approximately 10 minutes and spread over ~10 micrometers of dendrite.

Conclusions:

  • Local interactions between neighboring synapses facilitate clustered plasticity.
  • This phenomenon supports models of memory storage involving coordinated synaptic changes.
  • Clustered plasticity could enable the binding of behaviorally relevant information within a dendritic branch.