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.
Mardi Gras is French for Fat Tuesday the last day of feasting before Lent begins on Ash Wednesday. In the UK we call this day Shrove Tuesday. (Shrove comes from to shrive, an old word for Confession).