To further distinguish age - related memory loss from Alzheimer 's disease ( AD ) since it is thought to be targeted by aging .
Alzheimer 's disease ( AD ) is a subregion of the hippocampal formation called the dentate gyrus ( DG ) was further studied .
To further distinguish age - related memory loss from Alzheimer 's disease ( AD ) , a subregion of the hippocampal formation called the dentate gyrus ( DG ) was further studied , since it is thought to be targeted by aging .