[Comparison of effects of 5 and 20 Hz magnetic field on cerebral ischemia in rats].
OBJECTIVE
To compare the effects of 5 Hz and 20 Hz magnetic field on cerebral ischemia in rats.


METHODS
After cerebral ischemia was produced by ligation of the left general carotid artery, rats were stimulated by magnetic fields of 5 Hz and 20 Hz respectively and pathological changes in neurocytes were observed.


RESULTS
(1) Different pathological changes were observed in different cells; (2) The extent of damage of pyramidal cells was milder in 5 Hz magnetic field groups than those in the control group, and the effect was not remarkable in the 20 Hz group; (3) The effect on astroglia was worse in 5 Hz group than that in control and 20 Hz group.


CONCLUSIONS
Magnetic field stimulation influences cerebral ischemic reaction with frequency-dependency.
Zhao
L
L
Institute of Space Medico-Engineering, Beijing, China.
Zhao
D M
DM
Wei
J H
JH
Yan
G D
GD
Wang
Y Q
YQ
Huang
Z M
ZM
D000818:Animals; D001253:Astrocytes / Q000473:pathology*; D002545:Brain Ischemia / Q000473:pathology*; D002339:Carotid Arteries / Q000601:surgery; D008026:Ligation; D008280:Magnetics / Q000009:adverse effects*; D017966:Pyramidal Cells / Q000473:pathology*; D051381:Rats