Synaptic plasticity of prefrontal long-range inhibition regulates cognitive flexibility.

Potentiation of prefrontal callosal GABAergic synapses from PV neurons enables cognitive flexibility during rule shifts, with a significant impact on behavior.

• Why it matters: Understanding how inhibitory synaptic plasticity influences higher-order cognition fills a crucial gap in neuroscience, especially given its potential role in neuropsychiatric disorders.
• What they did: The study used behavioral optogenetics and patch-clamp electrophysiology to examine plasticity at long-range GABAergic synapses, focusing on callosal PV neuron connections during rule-shifting tasks.
• The result: Disrupting this plasticity caused perseverative behavior, while restoring it with gamma-frequency stimulation improved flexibility, highlighting a new mechanism for regulating cognition and potential therapeutic targets.