Sian Lewis summarizes work by Kühn and Gallinat:
A new study has used voxel-based morphometry of MRI scans of adult video-game players to investigate whether there is a correlation between gray matter volume and the number of years spent playing video games ('joystick years'). They found that gray matter volume in the entorhinal cortex was altered and that the direction of change was influenced by the type of game played; logic or puzzle games tended to increase entorhinal gray matter volume, whereas action-based games had the opposite effect. Moreover, hippocampal volume was found to be greater in players with more 'joystick years', suggesting positive long-term effects on visual attention and navigation.
