Here is a smart helmet that can be used to monitor your brain activity and gather data that can be used for treatment of pain and other health issues. The Enobio 2 helmet measures electrical currents in the brain. It is available with 8 to 32 channels. The data can be stored on a SD card or transmitted via Bluetooth.
Enobio 32 comes with an intuitive user interface. It can record and visualize 24 bit EEG data at 500 S/s. More info is available here.