Magnesium to help with Memory?

Based on a study done last year looks like they found that more magnesium in the brain helps with short term and long term memory.

"Magnesium is essential for the proper functioning of many tissues in the body, including the brain and, in an earlier study, we demonstrated that magnesium promoted synaptic plasticity in cultured brain cells," - Professor Guosong Liu, Director of the Center for Learning and Memory at Tsinghua University in Beijing

Here is the original article:
Magnesium Supplement Helps Boost Brainpower
http://www.sciencedaily.com/releases/2010/01/100127121524.htm

Here is the original study published:
Enhancement of Learning and Memory by Elevating Brain Magnesium
http://download.cell.com/neuron/pdf/PIIS0896627309010447.pdf?intermediate=true

Anyone believe in this stuff, looks like only the specific magnesium l-threonate helps with increasing magnesium levels in the brain? I am a bit skeptical but looks promising. Anyone have any idea on how magnesium affect the brain? Or even where we can find this stuff? Only thing I found was a few forum topics and these guys
http://www.mlt500.com

All I know is something like 80% of our body processes are for our BRAIN. We think about neurotransmittors as something separate but they are not - they are from our NUTRITION we take in. But so many things are needed! I have no doubt magnesium (Mg) may be needed, but so are the B vitamins, and so is vitamin D and so are the essential fatty acids, and so is GABA, and carnitine, and CoQ10, and ......

So, if I were really concerned (and I am), I would (and I did) get some extensive nutritional testing. I had ulterior motives - having cancer, but in the course of the cancer events discovered genetically, I am at increased risk for Alzheimer's.

One thing I find comforting is that because so many factors go into ultimate risk (and health) that we DO have control over, I am pleased. I can increase exercise. I can have my healthy shakes/shakes in the mornings. I can eat organic, increase my veggies, get better sleep, etc.

By the way, the doctor just said I need to take a magnesium supplement at nights, but to decrease it if it changes my bowel movements too much. I don't know what he meant by that - might it cause me constipation? diarrhea? I don't know... I'm going to look that up on this wonderful resource called the Internet before I start on the supplement tonight.

I just looked up Mg on WebMD. Unfortunately it could cause diarrhea. Sheesh. I sure don't need that! And I don't really understand why my doctor says I need to take it because we get it from fiber-rich fruits and dark green leafy veggies which I eat every day. At any rate, WebMD verifies its many uses in addition to constipation - bad cholesterol, heart disease, and sure enough - problems affecting the functioning of our nerves and brain!!!
.... from WebMD:
attention deficit-hyperactivity disorder (ADHD), anxiety, chronic fatigue syndrome (CFS), Lyme disease, fibromyalgia, leg cramps during pregnancy, diabetes, kidney stones, migraine headaches, weak bones (osteoporosis), premenstrual syndrome (PMS), altitude sickness, urinary incontinence, restless leg syndrome, asthma, hayfever, multiple sclerosis, and for preventing hearing loss.