This paper describes investigation of the brain activity in an adapting process to inversion vision through electroencephalogram (EEG). In particular, we used Candle-like microneedle electrodes, which does not require any preparation for measuring high-quality EEG. Note that conventional wet electrodes require abrasion of stratum corneum and application of electrolyte paste as preparation for measurement of EEG and they give discomfort to subjects and take time for experimenters. In our previous study, the eye movement during the adapting process was measured and the progress of the process was successfully captured. In this study, we measured EEG during the pointing task under an inverse vision state to correlate the perceptual learning with EEG. We discovered that High β wave, Low γ wave and Mid γ wave had strong correlation with the process of adapting to inversed vision.