Counting the number of releasable synaptic vesicles in a presynaptic terminal
Synaptic transmission depends on the continued availability of neurotransmitter-filled synaptic vesicles (SVs) for triggered release from presynaptic boutons. Surprisingly, small boutons in the brain, that already contain comparatively few SVs, are thought to retain the majority of these SVs in a "reserve" pool that is not mobilized under physiological conditions. Why such a scarce synaptic resource is normally inaccessible has been a matter of debate. Here, we readdress this issue by...[Show more]
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