Our frequent observations that geomagnetic perturbations between 10 and 100 nT were associated with changes in neurotic complaints suggested that cerebral application of artificial electromagnetic fields could have beneficial consequences. Patients who were diagnosed as suffering from neuroses or who had chronic headaches from various etiologies were exposed to various intensity (0.07 mT, 0.88 mT, 2.6 mT and 9.64 mT) constant, homogeneous magnetic fields. During magnetic field exposure, increases in forehead electro-dermal resistance and decreases in complaints were noted for both groups; patients suffering from headaches displayed the greatest improvement. Significant relative increases in alpha activity but decreases in delta and theta activity were correlated with the field-associated improvement of symptoms. No adverse effects were observed. Assuming that pretreatment electroencephalographic records contain not more than 11% low-frequency beta (12.5-17.5 Hz) activity, patients who display irritability, insomnia or chronic, intermittent headache pain will respond favorably to the treatment.