Abstract
Electrical energy per unit time of brain waves was measured on elec-troencephalograms of man and animal, and the following law was estab-lished with regard to the distribution of energy in the electroencephalo-gram, namely:
ƒ(ε)dε=1/-εe-ε/-εdε,
where ƒ(ε)dε represents the probability that energy ε lies between ε and ε+dε, and -ε the mean energy. To deduce this law theoretically from plausible assumptions, a statistical theory was advanced. An important conclusion from this theory is that the utilizable energy of the brain must be kept constant at its maximum, and this inference seems to be consistent with experimental evidence on brain metabolism: It can be explained also from this theory that the mean energy of brain waves increases under unfavorable conditions such as oxygen deficiency, narcosis etc.
