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Synaptic Density

Meaning

Synaptic density is a neurobiological metric quantifying the number of synapses—the specialized junctions that permit neurons to transmit electrical or chemical signals—per unit volume in a specific brain region. This measure is a critical indicator of brain plasticity, cognitive reserve, and the overall efficiency of neural communication. Hormones, particularly neurosteroids, are profound modulators of synaptic density, directly impacting memory, mood, and neurocognitive function.