[The quantitative analysis of electroencephalography in primary hypothyroidism].
The EEG topography was recorded in the patients with primary hypothyroidism, and the relationship between equivalent potential and blood thyroid hormonal levels were investigated. To determine the relationship between the % equivalent potential fraction (%EPF) and the levels of blood free T3, free T4, and TSH in each patient, regression lines were drawn in respective EEG spectral bands. The %EPF of each patient showed a tendency to have a negative correlation with the values of blood free T3 and free T4 in slow frequency spectral bands such as delta, theta, and alpha 1 waves, whereas a positive correlation in fast frequency bands such as alpha 2, beta 1, and beta 2 waves. In particular %EPF had a significant relationship with blood free T3 levels in alpha 1 and beta 2 spectral bands. These results suggest that the thyroid hormones may have influence on the mechanisms of EEG rhythm formation in primary pypothyroidism.
Kamei
H
H
First Department of Internal Medicine, School of Medicine, Fukuoka University.
Sasaki
H
H
Abe
H
H
Nishimaru
K
K
Okumura
M
M
D000328:Adult; D000368:Aged; D004569:Electroencephalography; D005260:Female; D006801:Humans; D007037:Hypothyroidism / Q000097:blood / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D013972:Thyrotropin / Q000502:physiology; D013974:Thyroxine / Q000502:physiology; D014284:Triiodothyronine / Q000502:physiology
D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine