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Are Electrical Synapses Bidirectional?

September 13, 2023
written by Sidra Batool

Yes, electrical synapses are bidirectional. This means that the signal can be transmitted in both directions, from the presynaptic neuron to the postsynaptic neuron and vice versa.[source]

Also learn Why Chemical Synapse Is Unidirectional?

Why Electrical Synapses are Bidirectional?

Electrical synapses are bidirectional because the gap junctions that connect the two neurons allow ions to flow in both directions.

This means that an action potential can travel from the presynaptic neuron to the postsynaptic neuron, and vice versa.

When an action potential occurs in the presynaptic neuron, it opens the gap junctions and allows ions to flow from the presynaptic neuron to the postsynaptic neuron.

This depolarizes the postsynaptic neuron and triggers an action potential in that neuron.

The bidirectionality of electrical synapses is important for a variety of functions, such as the coordination of movement and the synchronization of neuronal activity.

For example, electrical synapses are found in the retina, where they help to synchronize the activity of the photoreceptor cells. This synchronization is essential for vision.

Also learn about:

What is Synapse?5 Types of Synapse-An Overview  
Chemical Synapse-Steps, Types, Examples, and FunctionsElectrical Synapse-Steps, Types, Examples, Functions, and Advantages
Why Chemical Synapse Is Unidirectional?Why Are Chemical Synapses More Common?
Synaptic InhibitionHow To Measure Strength of Electrical Synapse?
When Transmission Occurs at a Synapse?Action Membrane Potential of Neuron