Psychophysiological Changes Pertaining to Temporary Lateralization

• Main Authors: Chui-Nan Chiang, 江垂南
• Other Authors: Lung Yu
• Format: Others
• Language: en_US
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/76327715613055155762

碩士 === 國立成功大學 === 行為醫學研究所 === 90 === Abstract This article describes an asymmetrical monocular goggle method to examine the hypothesis that unilateral nasal-sided retina stimulation exerts more robust lateralization effects than does ipsilateral retina stimulation. In addition, this study was undertaken to assess the impacts of unilateral and unilateral nasal-sided retina stimulations on the psychophysiological (EEG, ear and finger temperature) and affect changes. Surprisingly, the lateralization effect (asymmetry index [(L-R/L+R) × 100] of beta/alpha EEG (p < .047) in frontal region) produced by left retina stimulation was found more robust as compared to it produced by ipsilateral nasal-sided retina stimulation in healthy subjects. Nonetheless, such lateralization effect was comparable between right retina stimulation and ipsilateral nasal-sided stimulation in these subjects. These results did not support the above-mentioned hypothesis. Moreover, the other psychophysiological indices such as ear and finger temperature failed to exhibit any difference regardless of the side and degree of retina stimulation in healthy subjects. In contrast, the lateralization effects (laterality index (L-R) of finger temperature) produced by left-sided retina stimulation were found more robust as compared to it produced by ipsilateral nasal-sided retina stimulation in the psychotic patients. More interestingly, the higher degree of retina stimulation, the more intense affects such as anxiety and guilt were expressed in the psychotic patients. In healthy subjects, they reported lower degree of anger and sadness under the left retina stimulation compared to anger and sadness experienced under the left nasal-sided retina stimulation. Lateralization effects on affect changes were discussed.