Mesothelioma can take a long time to develop, and the symptoms of the disease often do not present themselves until the cancer has progressed to later stages. Early signs of mesothelioma can be easily mistaken for common, everyday ailments, and as a result, early symptoms are often ignored, dismissed, or misdiagnosed.
Freebase(0.00 / 0 votes)Rate this definition: Electroencephalography is the recording of electrical activity along the scalp. EEG measures voltage fluctuations resulting from ionic current flows within the neurons of the brain.
The multichannel tracing on paper of the output of the ELECTROENCEPHALOGRAPH, representing the electrical activity of the brain as occurring between pairs of electrodes in contact with the scalp and representing the algebraic sum of an immense amount of underlying electrical activity.