“The selective memory isn’t selective enough,” Blake Morrison, British Poet
Well, maybe not….Can’t remember why you turned on your computer, or went into the next room …or maybe, where you put your keys? FAGEDDABOUTIT!!! There is comforting new research that will ease those fears of dementia or alzheimer’s disease that secretly stalk you as you go on a room-by-room search for those pesky keys.
Kathi Mestayer, Science Writer, and Staff Writer for Hearing Health Magazine, cites a recent study on the formation and reserve of new neurons by Paul Frankland, Associate Professor of Physiology and Chair of Cognitive Neuorbiology at the University of Toronto and, his wife, neuroscientist and study author, Sheena Josselyn and a host of colleagues.
Ms. Mestayer reports that the study, “…demonstrates that the creation and storage of new neurons (neurogenesis) leads to the loss of existing memories. Their experiments show that when mice engage in activities that promote neurogenesis (the process of forming new neurons), some the pre-existing memories can be lost.”
Excerpting Paul Frankland, “‘In fact, memory loss is a normal activity,’ Frankland continues ‘As we continually add new memories, we have to wipe the slate clean of mundane content that we don’t need. Forgetting is okay.’”
So, Frankland, Josselyn, and colleagues may have helped shed light on the origins of a universal mystery. Dubbed “Infantile amnesia” by Sigmund Freud, people have long wondered why it’s so hard to call up many early childhood memories. In a Guardian Weekly article about this research Frankland is quoted, ” ‘Previously, people would argue that neurons only help make new memories… But as you’re adding neurons, you’re also wiping away older memories.’ ” (See http://www.theguardian.com/science/2014/may/24/brain-neuroscience-neurogenesis-childhood-memories, and,http://www.washingtonpost.com/national/health-science/new-brain-cells-could-be-blanking-out-old-memories-research-on-rodents-suggests/2014/05/17/e2623844-dc6d-11e3-b745-87d39690c5c0_story.html )
There are, however, other factors that can negatively impact our ability to recall. Some of the causes associated with memory loss include:
Depression & Anxiety
Stress
Dementia
Head Injury
Epilepsy
Stroke
Drug and Alcohol
Abuse
Brain Tumor
While these factors are detrimental to memory retention, they are obviously not applicable to everyone. In fact, you can sharpen your memory by engaging in exercise, learning new skills, social interaction, etc. But, maybe when you have a lot on your mind, a few early, unimportant memories will slip away. As Ms. Mestayer remarks, “With respect to humans, their finding suggests that neuron-creating activities, like exercising, may enable our hippocampus to clean house from time to time. If only we could decide what to keep and what to toss…” Kathi Mestayer is a Science Writer, Staff Writer for Hearing Health Magazine, Author of “Be Hear Now” on Beacon Reader, on the Advisory Board, Va Department for the Deaf and Hard of Hearing Advisory Committee, Greater Richmond Hearing Loss Association. Also, find her on HearingaidsRcool@blogspot.com