ID 112026
Title Alternative
Sex differences in Somatosensory Evoked Potential (SEP) and EEG of healthy adults
健常男性成人と健常女性成人における大脳誘発電位の相違
Author
Kagawa, Kouichi The University of Tokushima
Nakayama, Hiroshi The University of Tokushima
Kaneda, Yasuhiro The University of Tokushima
Ikuta, Takumi The University of Tokushima
Karisya, Kenji The University of Tokushima
Keywords
SEP
sex difference
EEG
stature
age
Content Type
Journal Article
Description
Sex differences in SEP (Somatosensory Evoked Potential) and EEG were studied with 90 healthy adult males (mean age=25.3±3.1 y.o.) and 96 adult females (mean age=21.6±2.7 y. o.). SEPs evoked by median nerve stimuli were recorded with 1000 msec of analysis time through the two derivations (bipolar: C3’→F3’ and monopolar : C3’→A1+2). The differences between the two group mean SEPs of each sex were studied. The differences in latencies and interpeak amplitudes of individual SEPs between sexes were tested statistically. The following results were obtained.
1. In the waveform of group mean SEP, there were differencies between N 3 and P 6, with P 4 (bipolar), and P 5, N 5 (monopolar) for females but not for males. The latencies of most of components were shorter, and interpeak amplitudes were larger in females than in males.
2. In the individual SEP most of latencies were significantly shorter and interpeak amplitudes were significantly larger in females than in males.
3. The significant sex differences in latencies and amplitudes of SEP components were verified even after excluding the influences of age and stature, by analysis of covariance.
4. In EEG, θ, β 1 and β 2 power % were larger, and δ and α 2 power % were smaller in fem ales than in males.
The sex differences in SEP verified in this study might be attributed to larger corpus callosum and less differentiated lateralities of the brain in females than in males, and the differences in sex hormon between the two sexes.
Journal Title
Shikoku Acta Medica
ISSN
00373699
NCID
AN00102041
Publisher
徳島医学会
Volume
54
Issue
1
Start Page
39
End Page
49
Sort Key
39
Published Date
1998-02-25
FullText File
language
jpn
TextVersion
Publisher