Abstract
When we try to investigate unknown, mysterious phenomena scientifically, not only the direct measurements of the phenomena-self, but also physiological measurements on observers and on recipients of the phenome-na's effect are undoubtedly important. As physiological data, information from the brain must be most ex-pected. However, as the data obtained are indirect information from subcranial activities and furthermore the brain information in itself is just indirect for the inquired phenomena, it is very difficult to pull out the essential information from the data. The problem of 'consciousness' cannot be ignored in any consideration about the brain. Further, consideration of the physiological data related to unconsciousness must be important. So, vari-ous previous experiments carried out by the authors are reviewed on these points. Additionally, the authors have recently measured the EEGs of a Brazilian dream reporter, Jucelino Nóbrega da Luz. Consciousness, un-consciousness and dreaming are considered with reference to his EEGs, and then scientific considerations of unknown phenomena are made from the data.
