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  • Title: Electroencephalographic evidence of sensory gating in the occipital visual cortex.
    Author: Gjini K, Sundaresan K, Boutros NN.
    Journal: Neuroreport; 2008 Oct 08; 19(15):1519-22. PubMed ID: 18797309.
    Abstract:
    Sensory gating refers to the suppression of the neuronal response to a repeating stimulus and is considered a protection mechanism in the brain. In this study, we assessed gating of the mid-latency components of the visual evoked potentials (N75, P100, N150) in 11 healthy individuals using a paired-flash paradigm. A significant decrease of P100 and N150 amplitudes was shown; additionally, a significant increase in the latency of N75 and P100 for the second stimulus of the pair compared with the first one was also observed. Absolute power of the stimulus 2 signal at theta frequency was significantly suppressed as compared with the stimulus 1 signal. These results indicate a gating effect in the visual modality, reflected in both time-domain and frequency-domain measures.
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