The three-month study, by the Mind Research Network, found adolescent girls who played Tetris not only displayed greater brain efficiency, but developed a thicker brain cortex, a sign of increased grey matter…

“Tetris for the brain is quite complex,” he said. “It requires many cognitive processes like attention, hand-eye co-ordination, memory and visual spatial problem solving all working together quickly.

“It’s not surprising that we see changes throughout the brain.”