Functional recomposition of excitatory synaptic inputs to individual neurons in ferret visual cortex after the onset of visual experience.

Visual experience induces a dramatic, selective reorganization of excitatory synaptic inputs in ferret visual cortex, increasing orientation- and direction-selective inputs by 50%.

• Why it matters: Understanding how early visual experience refines neural networks is crucial for insights into sensory development and plasticity, yet the mechanisms of synaptic reorganization remain unclear.
• What they did: Researchers examined the functional properties and spatial organization of dendritic spines on layer 2/3 neurons before and after visual experience, focusing on changes in synaptic input composition and arrangement.
• The result: Findings show that visual experience expands and reorganizes excitatory inputs, especially binocular ones, with co-tuned inputs clustering along dendrites, supporting enhanced tuning and binocular responses.