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Volatility of Human Memory
prostoalex writes "Scientific Americans looks into the human brain, trying to figure out why some events just tend to stick in our memories forever, while the others are gone: "How does a gene "know" when to strengthen a synapse permanently and when to let a fleeting moment fade unrecorded? And how do the proteins encoded by the gene "know" which of thousands of synapses to strengthen? The same questions have implications for understanding fetal brain development, a time when the brain is deciding which synaptic connections to keep and which to discard. In studying that phenomenon, my lab came up with an intriguing solution to one of these mysteries of memory.""
If we can figure out what proteins need to be expressed to convert short term to long term memory and somehow in the future find some sort of drug that ups the expression of that gene we will still have a problem with what do you do when every memory is a lasting one? Do ou need to know the plate# of every car you drove by on the way home or the order of the commercials when watching Oprah? I think if we mess with the number of long term memories we make we may also lose the selectivity which is so important in making sure the brain isn't cluttered with irrelevant memories and we strengthen only important ones.
Increase the signal to noise ratio of my memory, then w're in business.
There is some pain that is important to remember. It's VITAL to remember. This is stuff like knives are dangerous (learn this after a cut), a stove is hot (ouch!), it hurts having people piled on you (making it hard to breath), etc. All these things are important to remember for your survival. If you forgot that putting your hand on a stove hurt, how many times would you do that during your life? This is important stuff, so this comment's parrent is right.
At the same time there are things that are painfull that need to be forgotten. Some (like childbirth, mentioned in my other comment) could be a BIG problem if they were remembered. Others (highly traumatic events, abuse, serious car wrecks when you're bleeding on the pavement, etc) could prevent you from functioning if you remembered them. These things should, must, be forgotten to live a normal life. These things are fewer, and more likely to be emotional or abuse related.
As for "recovered memories", I agree completely. They are bogus, and very dangerous. There are some good books out there about the falacy's and dangers of recovered memories.
Comment forecast: Bits of genius surrounded by a sea of mediocrity.
However, all of this exchange takes energy, and if there's a more energy efficient way of doing things (such as, perhaps, storing memories in the extracellular matrix), evolution would tend to select in favor of it.
:)
Not necessarily so. Just because process A is more energy efficient than process B does not mean that process A will be more likely selected for. Evolution is not hill climbing. In fact, evolution tends to create the opposite effect. Organisms become more complex (and usually less efficient) over time. If evolution tended to select for efficiency over other factors then entropy would be winning, not losing. Wouldn't that suck?