Theta oscillations in prolactinomas: Neurocognitive deficits in executive controls

•Prolactin levels negatively correlated with prolactinomas’ executive controls.•Prolactin levels mediated the correlation between frontal theta activity and inhibition control ability.•Prolactinomas exhibited decreased frontal theta power in Go/Nogo task.•The frontal theta oscillation was highlighted as the electrophysiological markers of the impaired inhibitory control in prolactinomas.