eLife· 2026Q1
Loose coupling between Ca2+ channels and release sensors as a synaptic correlate of higher-order brain function
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- 2026year
Short summary
Pyramidal neuron synapses in the prefrontal cortex (PFC) exhibit loose microdomain coupling, unlike the tight coupling in the primary somatosensory cortex (S1), correlating with distinct synaptic timing, efficacy, and plasticity, and suggesting a presynaptic mechanism for higher-order brain functions.
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Key points
- Pyramidal neuron synapses in PFC exhibit loose microdomain coupling, while S1 synapses show tight nanodomain coupling.
- Loose coupling in PFC synapses is associated with differences in synaptic timing, efficacy, and plasticity compared to S1.
- The findings suggest that synaptic topography tuning specializes identical neuron types for distinct cortical functions.
- Microdomain coupling in pyramidal neuron synapses may serve as a presynaptic correlate for higher-order neocortical functions.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract In the mature neocortex, functionally distinct areas are built by the same archetypes of neurons, but depending on the area, these neurons and their synapses are engaged in very different functions, ranging from lower order processing of sensory information to higher order associations and cognitive functions. We found significant differences in the functional presynaptic nanoarchitectures of the same types of pyramidal neuron synapses, depending on whether they are located in the prefrontal cortex (PFC) or in the primary somatosensory cortex (S1). Synapses in PFC operated with loose microdomain coupling as opposed to tight nanodomain coupling in S1. These differences were associated with significant differences in synaptic timing, efficacy and plasticity between areas. Our data suggest that the mature neocortex uses tuning of synaptic topographies to specialize seemingly identical types of neurons for their required function. They suggest that microdomain coupling in pyramidal neuron synapses could be a presynaptic structure-function correlate of higher order neocortical functions.
The authors' abstract, as published at the source. eLife, 2026 · DOI ↗
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Field: Cellular and Molecular Neuroscience
Cellular and Molecular NeuroscienceNeuroscience