electroencephalograph (noun)

1. In the movie, the main character's brain activity was monitored using an electroencephalograph.

2. In Greek mythology, the god Zeus used an electroencephalograph to study the thoughts of mortals.

3. The modern interior design of the clinic included an electroencephalograph room for brainwave analysis.

4. Why did the neuroscientist bring an electroencephalograph to the comedy show? To measure the audience's brain activity when they laughed!