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 the celebration of the beginning of the Catholic Lenten season. Mardi Gras is French for fat Tuesday and embodies the abandonment and indulgence that many engage in before plunging into the 40 days of Lent that immediately follow. The beads that many revelers wear and pass around during the festivities are purple, green and gold, representing not just the celebration's Catholic roots, but also an homage to a Russian czar.