In the hyponeophagia test, the latency to eat a preferred food placed in the centre of the testing arena and the distance travelled is shown for C57Bl/6N mice fed either the control diet (control; n = 19), the Mg2+ deficient diet (MgD; n = 16), or the Mg2+ deficient diet and additional long-term treatment with either desipramine (MgD + DMI; n = 12) or paroxetine (MgD + PAR; n = 16). Data represent means ± SEM. *P < 0.05, **P < 0.01, ***P < 0.001 for Mg2+ deficient vs. control mice, ###P < 0.001 for drug-treated Mg2+ deficient mice vs. Mg2+ deficient mice.