Related Experiment Video
Updated: Mar 23, 2026
11:56
Slice Patch Clamp Technique for Analyzing Learning-Induced Plasticity
Published on: November 11, 2017
16.5K
Inhibition as a Binary Switch for Excitatory Plasticity in Pyramidal Neurons
Katharina A Wilmes1,2, Henning Sprekeler2,3, Susanne Schreiber1,2
1Department of Biology, Institute for Theoretical Biology, Humboldt-Universität zu Berlin, Berlin, Germany.
Plos Computational Biology
|March 23, 2016
Summary
Dendritic inhibition acts as a switch, controlling synaptic plasticity by gating action potentials. This mechanism allows for pathway-specific memory regulation without disrupting information flow, offering new insights into neuronal circuit function.
Area of Science:
- Neuroscience
- Computational Neuroscience
Background:
- Synaptic plasticity underpins learning and memory formation.
- Maintaining memory trace stability requires plasticity regulation.
- Dendritic inhibition is a potential regulator of synaptic plasticity.
Purpose of the Study:
- Investigate dendritic inhibition's role in switching synaptic plasticity.
- Analyze temporal and spatial constraints of this inhibitory gating mechanism.
- Determine if bAPs can be suppressed without affecting forward EPSP transmission.
Main Methods:
- Computational analysis using conductance-based multi-compartmental models.
- Simulation of backpropagating action potentials (bAPs) and calcium spikes.
- Modeling of excitatory postsynaptic potentials (EPSPs) and inhibitory synaptic inputs.
Main Results:
- Dendritic inhibition can robustly control bAPs and calcium spikes in an all-or-none manner, acting as a binary switch for plasticity.
- Inhibitory synapse location dictates spatial control, enabling pathway-specific plasticity regulation.
- Precise timing allows bAP suppression while preserving forward EPSP signaling; timing is less critical for distal calcium spikes.
- Feedforward inhibition circuits provide necessary temporal precision for bAP control.
Conclusions:
- Inhibitory gating of bAPs and calcium spikes offers a robust mechanism for regulating synaptic plasticity.
- This provides a pathway-specific, binary switch for plasticity, crucial for memory stability.
- This highlights a novel function for inhibitory neurons in controlling plasticity beyond modulating excitability.
More Related Videos
Related Concept Videos
01:29Excitatory and Inhibitory Effects of Neurotransmitters
14.5K
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...
14.5K
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
4.7K
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...
4.7K
01:19The Role of Ion Channels in Neuronal Computation
4.2K
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....
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....
4.2K
01:25Long-term Potentiation
3.8K
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...
Hebbian LTP
LTP can occur when...
3.8K
01:35Long-term Potentiation
59.4K
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.
59.4K