Journal
JOURNAL OF NEUROSCIENCE
Volume 41, Issue 12, Pages 2656-2667Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.1337-20.2021
Keywords
awake patch clamp; experience; familiarity; oscillations; selectivity; visual cortex
Categories
Funding
- National Institute of Mental Health [R01 MH116500]
- Research Fund for International Young Scientists at the National Natural Science Foundation of China [31650110468]
- New York University-East China Normal University Institute of Brain and Cognitive Science at New York University Shanghai
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Neural oscillations are crucial for information processing, communication between brain areas, learning, and memory. Familiar visual stimuli can induce 5-Hz oscillations in the primary visual cortex of awake mice. Visual experience affects the visual orientation and selectivity of V1 neurons, as well as membrane potential and firing rates.
Neural oscillations play critical roles in information processing, communication between brain areas, learning, and memory. We have recently discovered that familiar visual stimuli can robustly induce 5-Hz oscillations in the primary visual cortex (V1) of awake mice after the visual experience. To gain more mechanistic insight into this phenomenon, we used in vivo patch-clamp recordings to monitor the subthreshold activity of individual neurons during these oscillations. We analyzed the visual tuning properties of V1 neurons in naive and experienced mice to assess the effect of visual experience on the orientation and direction selectivity. Using optogenetic stimulation through the patch pipette in vivo, we measured the synaptic strength of specific intracortical and thalamocortical projections in vivo in the visual cortex before and after the visual experience. We found 5-Hz oscillations in membrane potential (V-m) and firing rates evoked in single neurons in response to the familiar stimulus, consistent with previous studies. Following the visual experience, the average firing rates of visual responses were reduced while the orientation and direction selectivities were increased. Light-evoked EPSCs were significantly increased for layer 5 (L5) projections to other layers of V1 after the visual experience, while the thalamocortical synaptic strength was decreased. In addition, we developed a computational model that could reproduce 5-Hz oscillations with enhanced neuronal selectivity following synaptic plasticity within the recurrent network and decreased feedforward input.
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