Electroencephalography, is the study of electrical activity along the scalp. Its commonly known as EEG. In the Event Related Potential lab in John Jay, i measure the voltage fluctuations created by the distribution of positive and negative voltages created by the neurons in the brain. Usually multiple electrodes are placed on the scalp individually, but in the lab i work in we have a cap (which is in the picture below) that has 64 electrodes to measure electrical activity across the scalp after a stimulus is presented. These waves are emitted by the brain. Anyone is more than welcome to participate in a study

-Edward