Dietary magnesium deficiency impairs hippocampus-dependent memories without changes in the spine density and morphology of hippocampal neurons in mice

•Effects of Mg2+ deficiency (MgD) on memory and neuron morphology were examined.•Mice fed MgD diet show deficits in hippocampus-dependent memories.•MgD did not affect amygdala-dependent memory, locomotion, or emotional behaviors.•Mice fed MgD diet show normal spine density and morphology of hippocam...

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