ID 111639
Author
Kaneda, Yasuhiro The University of Tokushima
Ikuta, Takumi The University of Tokushima
Nakayama, Hiroshi The University of Tokushima
Kagawa, Kouichi The University of Tokushima
Furuta, Noriko The University of Tokushima
Keywords
visual evoked potential
electroencephalogram
menstrual cycle
estrogen
progesterone
Content Type
Journal Article
Description
Flash visual evoked potential (VEP) and electroencephalogram (EEG) changes during the menstrual cycle were studied using healthy females having regular menstruation, with 21 at the follicular phase (FP) and 23 at the luteal phase (LP). The following results were obtained. (1)The waveforms of Group Mean VEPs of both groups had approximately similar triphasic contours, consisting of 16 components of P 1-N 8 up to 500 msec of latency. (2)Latencies tended to be longer in LP. (3)Interpeak amplitudes tended to be larger in LP, and one VEP interpeak amplitude (P 5-N 7) of long latency component was significantly larger at LP after eliminating the effect of body height by ANCOVA for 2 CH. (4)Quantitative analysis of EEGs between FP and LP resulted in a tendency for increased α, and decreased β power % at LP. Since estrogen increases the VEP amplitude, and decreases the VEP latency and the α activity of EEGs, the large VEP amplitude, the tendency for prolonged VEP latency, and the tendency for increased α power % at LP observed in this study indicate that the VEP amplitude at LP reflects the effect of estrogen, and that the VEP latency and EEGs at LP reflect the effect of progesterone.
Journal Title
The Journal of Medical Investigation
ISSN
13431420
NCID
AA11166929
Publisher
The University of Tokushima School of Medicine
Volume
44
Issue
1-2
Start Page
41
End Page
46
Sort Key
41
Published Date
1997-08
EDB ID
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher