O c u l a r d o m i n a n c e a f f e c t s m a g n i t u d e o f d i p o l e m o m e n t : a n M E G s t u d y H i r o s h i S h i m a 1 , 2 , M i t s u h i r o H a s e g a w a 1 , 4 O s a m u Ta c h i b a n a 1 , 5 , M o t o h i r o N o m u r a 1 , 2 , J u n k o h Ya m a s h i t a 1 , 6 Yu z o O z a k i 3 , J u n K a w a i 3 , M a s a n o r i H i g u c h i 3 , H i s a s h i K a d o 3 D e p a r t m e n t o f N e u r o s u r g e r y, G r a d u a t e S c h o o l o f M e d i c a l S c i e n c e , K a n a z a wa U n i ve r s i t y, K a n a z a wa , J a p a n 1 D e p a r t m e n t o f N e u r o s u r g e r y, Yo k o h a m a S a k a e K yo s a i H o s p i t a l , Yo k o h a m a , J a p a n 2 3 A p p l i e d E l e c t r o n i c s L a b o r a t o r y, K a n a z a wa I n s t i t u t e o f Te c h n o l o g y, K a n a z a wa , J a p a n 2 4 D e p a r t m e n t o f N e u r o s u r g e r y, F u j i t a H e a l t h U n i ve r s i t y, To yo a k e , J a p a n 5 D e p a r t m e n t o f N e u r o s u r g e r y, K a n a z a wa M e d i c a l U n i ve r s i t y, I s h i k a wa , J a p a n 6 D e p a r t m e n t o f N e u r o s u r g e r y, J u j o R e h a b i l i t a t i o n H o s p i t a l , K yo t o , J a p a n D e p a r t m e n t o f N e u r o s u r g e r y, Yo k o h a m a S a k a e K yo s a i H o s p i t a l 1 3 2 K a t s u r a -c h o , S a k a e -k u , Yo k o h a m a , 2 4 7 -8 5 8 1 J a p a n 3 P h o n e : + 8 1 -4 5 -8 9 1 -2 1 7 1 , F a x : + 8 1 -4 5 -8 9 5 -8 3 5 1 e -m a i l : i s l a n d @ v e s t a . o c n . n e . j p T h i s wo r k wa s s u p p o r t e d b y a g r a n t -i n -a i d f o r e x p l o r a t o r y r e s e a r c h f r o m t h e M i n i s t r y o f E d u c a t i o n , C u l t u r e , S p o r t s , S c i e n c e a n d T e c h n o l o g y , J a p a n ( N o . 1 6 6 5 9 3 8 3 ) .T h e m a i n b o d y t e x t o f t h i s p a p e r i s 1 1 , 7 9 1 c h a r a c t e r s l o n g .