With respect to synaptic and neuronal protein content, there were main effects for dementia status for two proteins: α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazolepropionic acid (AMPA)‐receptor GluA1 (a key glutamatergic synapse marker; dementia, F[1, 32] = 5.480, p = 0.0256) and synaptophysin (a general synaptic marker; dementia, F[1, 32] = 4.433, p = 0.0432). This evidence concerns the gene GRIA1 and dementia.