To have a healthy adult brain and mind is an incredible experience; something we shouldn’t just take for granted. In addition to our thinking and reasoning abilities and our vast memory of procedures and facts (e.g., how to place a subordinate clause in a sentence, or what your mother’s birthday is), we have a wide assortment of sensory and story-based memories of past experiences, going all the way back to childhood. (There is a physical limit on how far back we can remember, roughly around age 3, due to the early-childhood development of the hippocampus component of our brain, i.e. the “memory maker”). Our life, and the way that our present experiences fit in with our memories, seem like an incredibly rich story, one that hopefully makes sense to us. We think that we know who we were and what we were like back when we were children, back when we were teenagers then young adults, all the way through to our present age, be it 30, 45, 70, etc.
I certainly did think this for many years and decades. But the older I get (having just completed my 6th decade), the more I realize that I’ve probably forgotten much more about me and my life than I presently remember. Sometimes it’s the experience of coming across a picture or a letter I may have taken or written many years ago, that now seems unfamiliar; or talking with someone who was with me many years ago and remembers an incident that I totally forgot about. Often the memories do come back given a clue; but sometimes they don’t. And even when they do, they are often inaccurate or mixed up with other memory incidents. Studies on the reliability of courtroom testimony from witnesses who try with all honesty to describe a past incident are not very encouraging regarding the power of our “steel-trap memories”.
So, a whole lot from our past, a big portion of our lives, are very blurry or are now completely inaccessible. In some ways this is good; » continue reading …


