Sunday, October 7, 2012

Learning, Memory, and Amnesia

I used to think Alzheimer's disease was something that only happened to people who suffered a stroke or to people that had that gene in their family. I never thought it could just happen to anyone. But it can. Alzheimer’s disease can happen to anyone. About half of all patients with late-onset Alzheimer’s disease have no known relatives with the disease. This fact to me is frightening to say the least. I can’t imagine myself going through such troubling and debilitating symptoms. My grandmother has Alzheimer’s disease and I’m not saying this to gain sympathy but to show a real life example. It’s been more than difficult these past 7 years to deal with something as tragic as this. From forgetting simple words or stumbling over a few, to loosing motor functioning in both her legs and arms, to not having any recollection of a simple birthday party. It’s a constant struggle to help her walk or to even have a regular conversation with her, which has more than become impossible in the past 2 years. A protein called amyloid-b that accumulates both inside and outside neurons causes this disease. The net effect is to damage dendritic spines, decrease synaptic input, and decrease plasticity. As amyloid-b damages axons and dendrites, the damaged structures cluster into structures called plaques. As these plaques accumulate, the cerebral cortex, hippocampus, and other areas waste away. Another protein called tau separates from microtubules and clumps together to form tangles that accumulate inside the neuron and disable the transport system then destroying the cell. Neurons then disconnect and die which causes memory loss. The brain then shrinks and looses function. The most common treatment is to give drugs that stimulate acetylcholine receptors or prolong acetylcholine release. This increases arousal. Increased arousal improves memory; and people who drink 3-5 cups of coffee per day are less likely than average to develop Alzheimer’s.
This video is so interesting and gives lots of good facts about Alzheimer's and how awareness is the most important thing.

2 comments:

  1. I always knew that Alzheimer's was a very serious disease I just never realized to what extent. For instance, I didn't realize that Alzheimer's led to death within about 10 yrs. Not only does it lead to death but it pretty much strips away everything that makes you who you are before, without our memories we are basically babies, our memories make us who we are. I can only hope that soon there will be not only treatment for this terrible death sentence but also a cure.

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  2. One of the things I've come to notice is that many people also see Alzheimer's the same way you described. For example, I had never taken the time to think about what exactly Alzheimer's is. To me it was just forgetting stuff. I would have never guessed it was so much more than that. Alzheimer's is not just about forgetting. Its a whole lot more. Alzheimer's is the loss of motor functions, and the memories that shaped us to who & what we are. How I see it Alzheimer's is similar to a parasite. It takes & takes & takes from its victim.

    I also heard that 3-5 cups of coffee a day adds in lessening the likelihood of Alzheimer's. I had a couple of questions about this. How do you think coffee could help? I know I am no expert, but isn't 3 to 5 cups of coffee A DAY a little too much for a person? Think about all that caffeine intake. Think about how coffee dehydrates the body. Sure your lessening the chances of Alzheimer's but wouldn't you also be causing harm in some other aspect?

    All in all, splendid blog!

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