I did two balance experiments with a warmup of 8 trials. In one, the order of feet (which foot I stood on) was left, then right; in the other, right, then left. In both experiments I did much better (i.e., balanced longer) on my right foot than my left foot, ps < 0.001. This surprised me; I had never heard of such an asymmetry. The difference was so large that the platform size (0.75 inch) good for the left foot was too easy for the right foot. To make things as simple and easy as possible I decided to stop testing both feet and to only measure balancing on my right foot (and to use a 0.5-inch platform to make it more difficult and avoid a ceiling effect). I tested my balance (a) in silence and (b) listening to a book. The results were similar so I decided the standard condition will be listening to something. I want to make my balance test fast and pleasant. I came across several promising related facts: 1. On the Shangri-La Diet (SLD) forums, spacehoppa said she felt “solid on [her] feet” — which may mean her balance has improved. If so, the improved balance that I noticed may be widely true. She also said “my mind feels clearer,” another effect I noticed from omega-3’s, and more reason to think omega-3 improve brain function.
2. On the SLD forums, porkypine wrote, “I have a very strong reaction to the 1500 mg of OmegaBrite that I have begun taking in the morning. . . . During the day, I am not just happier, but actually chipper, which is not a normal state for me. I have wondered if I am getting too much Omega-3.” This supports one of the assumptions behind my upcoming tests of the effects of omega-3 on balance: the effects of omega-3 on the brain happen quickly. It also highlights an advantage of measuring balance rather than something else, such as mood — namely, it is reasonable to assume that the better your balance, the better your brain is working. As this quote shows, the mapping between mood and goodness of functioning is not so clear.
3. In a book about neurology (Defending the Cavewoman by Harold Klawans), including Creutzfeldt-Jacob disease, I read: “A [Fore] woman in late pregnancy who was unable to walk easily across a narrow tree trunk bridging a gorge knew from that change in her balance that she had kuru and that she would die of it. The physicians examined her and thought she was normal, but in less than one year, she was dead.” This shows that balance is an especially sensitive measure of brain function, at least under demanding conditions. It’s relatively easy to notice worse balance.
Balance is also much easier to quantify than many other measures of brain function, such as mental clarity.