테니스심상훈련이 뇌 활성에 미치는 영향: 테니스 무경험자에서 뇌파 전류원분포

Abstract

The previous studies showed that the visual imagery activated the occipital and posterior inferior temporal area of the brain, and the damage to the occipital cortex impaired the visual mental imagery. We studied current-source distribution of electroencephalography (EEG) to observe neuronal activity during imagery tennis playing. Eleven healthy volunteers were enrolled. All volunteers were right-handed males and novices for tennis playing. The mean age of them was 24.9 years. The EEGs were recorded on the scalp electrodes located according to the International 10∼20 System. The number of electrodes was 25 channels including subtemporal electrodes. The EEG recording session was 13 min including 5 segments: resting-I, scenery-slide show, resting-II, watching tennis-game video, and imagery-tennis playing. The recoding durations were 3, 2, 3, 2, and 3 min respectively. Five ‘artifact free 3-sec segments’ were selected in each segment of ‘imagery-tennis playing’ and ‘resting-II’. We did the frequency domain analysis with the EEG segments using a distributed model of current-source analysis. The statistical-nonparametric maps (SnPMs) were obtained between the segments of ‘imagery-tennis playing’ and the segments of ‘resting-II’ (p＜0.01). The significant change of current-source density was observed only in alpha-2 frequency band (10∼12 Hz). The current-sourcedensity was increased in the hippocampus, parahippocampus, and occipital fusiform gyrus in the right cerebral hemisphere (p＜0.01). Imaginary-tennis playing may activate the hippocampal-occipital alpha networks of nondominant hemisphere.