During an EEG, the electrical signals of the brain are recorded. This electrical activity is detected by electrodes, or sensors, placed on the patient's scalp and transmitted to a polygraph that records the activity.
Mardi Gras Beads or throws are a fun part of the Carnival festivities in New Orleans, Louisiana.
According to historians, Mardi Gras dates back thousands of years to pagan celebrations of spring and fertility, including the raucous Roman festivals of Saturnalia and Lupercalia.