Wires attached to the back of the probe lead to a computer that translates the electrical signals into a picture of the heartbeat, brainwave or whatever.
It took just 14 years for LinkedIn to grow from a brainwave in a tech entrepreneur's living room to a $26.2bn£18.5bnbn) takeover target.
Hear how schoolboy Ernie Norwood made friends with soldiers at Spurn Point and how an artist's brainwave led to camouflage being developed to confuse German U-boats.
Would you really be thinking about your PIN while using a brainwave headset to relax?
Be it a chemical brainwave or physical shockwave, every move leads to another.
Then, a brainwave: Hagen demanded to identify his ball.
Then I had a brainwave: we have to have a woman, an acerbic Brit, and it dawned on me.
She comes up with a brainwave, asking Stanley to guess which restaurant her brother will be dining at.
Bar drawing a lightbulb over her head, Esther does everything to imply I am witnessing the nativity of a brainwave.
Tucasi, a brainwave of three school governors, is selling software packages to schools, to manage the money parents pay for school dinners, outings and so on.
