Magnetic fields alter the circadian periodicity of seizures

We have recently reported that application of external, weak magnetic fields attenuated seizures in epileptic patients (Anninos et al., 1991). However, the mechanisms by which magnetic stimulation reduces seizure activity are unknown. We present four non-selected epileptic patients the first to be rated by the senior author, in whom treatment with magnetic fields attenuated the severity of seizures and also altered the circadian occurrence of seizures. The first patient, a 27-year old woman, had generalized tonic-clonic seizures which occurred almost exclusively at night. Following treatment with magnetic fields she experienced attenuation of seizures which then occurred only after waking up in the morning. The second patient, a 42-year old man, had generalized tonic-clonic seizures which occurred randomly during the day and night. Treatment with magnetic fields resulted in disappearance of nocturnal seizures with seizures now occurring exclusively during the day. The third patient, a 21-year old woman had generalized tonic-clonic seizures which occurred randomly during the day. After treatment with magnetic fields she was free of seizures for 7 months, but recently experienced one attack in the morning hours while sleeping. The fourth patient, a 39-year old woman had secondary generalized seizures since the age of 12. Prior to treatment with magnetic fields she had 8-10 seizures daily which occurred randomly during the day and night hours. Magnetic treatment resulted in attenuation in seizure frequency (1-2/day) with seizures now occurring only during the day. We propose, therefore, that since the pineal gland is a magnetosensitive organ which "transduces" environmental information of the light-dark cycle and of the earth's magnetic field into an endocrine message mediated via the circadian release of melatonin, and since it is recognized that melatonin attenuates seizure activity, artificial magnetic fields attenuate seizure activity by altering the functions of the pineal gland.