Mental meditations,you do essentiially in your head, that is, without bodily movement.The fact that we term these "mental" does notmean that they do not also affect the emotional life and physiology the use of the muscular apparatus. You do them while remaining in one position. The diffenrence ...

Implicit memory is memory that is stored in the brain that we aren't aware of consciously. I have the tendency to have deja vu quite often. I walk into a restaurant that I have never been too, but for some reason I feel like I have. Maybe this causes me to feel ill or excited for unknown reason...