M. J. Eckert, D. Guévremont, J. M. Williams and W. C. Abraham Rapid visual stimulation increases extrasynaptic glutamate receptor expression but not visual-evoked potentials in the adult rat primary visual cortex European Journal of Neuroscience 37
We tested whether rapid visual stimulation could induce a sensory long-term potentiation. Visual evoked potentials were recorded from urethane-anesthetised rats and after a stable baseline period, a photic tetanus was delivered. There was no evidence of a sensory LTP despite a number of manipulations of experimental variables. However, visual stimulation increased extrasynaptic glutamate receptor expression (GluA1, GluN1) in the visual cortex suggesting that visual cortex was primed and that further visual stimulation across days is necessary for sensory LTP.
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