Electrical Synapse: Gap Junctions
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An electrical synapse passes current directly between neurons through gap junction channel proteins, transmitting signals virtually instantaneously and sometimes bidirectionally, unlike a chemical synapse.
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Electrical synapses in the thalamus help synchronize neurons involved in fast reflexes and sleep rhythms.
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Electrical synapses are fewer in number than chemical synapses across the nervous system as a whole, despite their speed advantage.