Biosphere is characterized by the existence of Earth’s magnetic field (EMF) and cosmic radiation (CR). By measuring the EMF in beds of mentally ill people (MI), anomalous magnetic fields (AMF) were measured. That’s why we approached the study of central nervous system (CNS). Aims: To explain physiology of the CNS, how to use cosmic radiation (CR) in occurring brain micro power; To prove that neurons have magnetic characteristics; To explain brain amplifier and capacitor; To explain brain waves, alertness and sleep-REM phase, memory and reproduction as well as congenital instincts; To clarify consciousness; To determine correlation between AMF and MI people’s heads; If possible, to keep track of the health status of patients after relocation from AMF and to prove that the cause of MI people are AMF. Methodology: Literature study of the physiology and functioning of the CNS. By knowing physics, electric engineering and biochemistry, we explained the functioning of the CNS. Measuring of AMF was performed with proton magnetometer in 19 beds of MI people (depression, schizophrenia, epilepsy and Parkinson’s disease) and in 2 beds of healthy people. Geophysical interpretation of measured values was performed and the results are shown on sketches. MI people were transferred in natural EMF and their health status was monitored. Results: Physiology of the CNS and goals were explained. The brain generates micro electric power using CR. The cerebrum is the capacitor. The brain is the amplifier of afferent and efferent micro power impulses. The electroencephalogram, the emergence of brain micro powers, brain waves, alertness and sleep-REM phase, memory and reproduction as well as congenital instincts were explained. The consciousness was defined. AMF balance in MI people’s beds is presented on sketches. By measuring, spatial correlation between AMF and the patient’s head is determined, which indicates the cause of MI people. Monitoring of the health status of patients after relocation from AMF, did not give reliable recovery results due to the short monitoring time of patients, except in epilepsy. Conclusion: The CNS with CR is generator of micro electric power in the body. The main function of the CNS is explained. The correlation between AMF and MI people’s heads on about 500 patients was determined. With the help of psychiatrist, it’s necessary to determine how much of a help, in treatment of MI people, living in natural EMF is. The causes of MI people are AMF in people’s living area.