Effect of Magnetism on Learning Function
Magnetism has been used in medical and industrial fields to a considerable extent. As magnetism is not detected by sensory system or visual system, the effect of it on humans is not clear. The technique of pulsed magnetic stimulation of the human brain has recently been reported. 1–5 The magnetism used in this stimulation is strong but of very short duration. The magnetic stimulation with short duration is able to excite the nerves, which enables us to study nerve conduction in the central nervous system. Unlike electrical stimulation, magnetic stimulation excites the motor cortex without discomfort to the subject. Thus this method might be useful as a new clinical test to study central motor pathways. Although no deleterious effects have been observed thus far, the safety of this technique 6 has not fully been established. Our recent study showed decreases in dopamine and serotonin 60 minutes after 50 pulses of magnetic stimulation. These results led us to investigate, by use of the passive avoidance method, the effect of pulsed magnetic stimulation of the brain on learning function.
KeywordsMagnetic Stimulation Passive Avoidance Study Nerve Conduction Fusaric Acid Dark Chamber
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