A Northern Irish start-up has developed a headset that it says could spot early signs of dementia.

BrainWaveBank says the headset, which users need to wear while playing games on a phone, could go on sale to the public in three years. It monitors electrical brain activity to spot patterns that could be early indicators of brain conditions. The company is backed by Innovate UK, the Government’s tech investment arm, and is currently testing its headset with around 90 people.

The headset is worn for between 15 and 20 minutes a day while playing games on a smartphone, or tablet, designed to test memory, reactions and other functions.

It connects via Bluetooth and sends off the “electroencephalographic” brain data.