Effects of pulsed high-frequency electromagnetic fields on the neuroendocrine system.
Neuroendocrinology
; 67(2): 139-44, 1998 Feb.
Article
em En
| MEDLINE
| ID: mdl-9508044
ABSTRACT
The influence of pulsed high-frequency electromagnetic fields emitted from a circularly polarized antenna on the neuroendocrine system in healthy humans was investigated (900 MHz electromagnetic field, pulsed with 217 Hz, average power density 0.02 mW/cm2). Nocturnal hormone profiles of growth hormone (GH), cortisol, luteinizing hormone (LH) and melatonin were determined under polysomnographic control. An alteration in the hypothalamo-pituitary-adrenal axis activity was found with a slight, transient elevation in the cortisol serum level immediately after onset of field exposure which persisted for 1 h. For GH, LH and melatonin, no significant effects were found under exposure to the field compared to the placebo condition, regarding both total hormone production during the entire night and dynamic characteristics of the secretion pattern. Also the evaluation of the sleep EEG data revealed no significant alterations under field exposure, although there was a trend to an REM suppressive effect. The results indicate that weak high-frequency electromagnetic fields have no effects on nocturnal hormone secretion except for a slight elevation in cortisol production which is transient, pointing to an adaptation of the organism to the stimulus.
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Base de dados:
MEDLINE
Assunto principal:
Hidrocortisona
/
Hormônio Luteinizante
/
Hormônio do Crescimento Humano
/
Campos Eletromagnéticos
/
Melatonina
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article