Maeve Maddox, on Daily Writing Tips, has a very interesting post about Here’s an excerpt:“The word rack has numerous meanings, both as a noun and as a verb. As a noun, it originated from a word for “framework” which was probably related to a verb meaning “to stretch out.” The original framework was no doubt used for some innocent occupation such as stretching leather. Group trivia games. Later on, some evil so-and-so adapted that kind of rack for the purpose of torturing human beings by stretching their limbs.It is from the torture rack that we get the expression “to rack one’s brains.”The word wrack, with its identical pronunciation, is related to Old English wraec “misery” and wrecan “to punish.” In the fourteenth century, wrack took on the meaning “wrecked ship.” In time, it came to mean “seaweed” or anything cast up upon the shore.

Sherry Beth Connot writes: Every time I read how someone wracked their brain, I think it should be racked, and according to my dictionary it should.

The expression “to go to wrack and ruin” means to fall into a state of decay or destruction.”.

From dust we came. 8) It is a myth that humans only use 10 percent of our brain. We actually use all of it. We’re even using more than 10 percent when we sleep.9) Cholesterol is key to learning and memory. However, has different effects depending on your age and other factors.10) Information runs between neurons in your brain for everything we see, think, or do. These neurons move information at different speeds. The fastest speed for information to pass between neurons is about 250 mph.11) are believed to be a combination of imagination, phycological factors, and neurological factors.

They prove that your brain is working even when you are sleeping. 17) During the mummification process, Egyptians would usually remove the brains through the nose.18) Alcohol effects your brain in ways that include blurred vision, slurred speaking, an unsteady walk, and more. These usually disappear once you become sober again.

However, if you drink often for long periods of time, there is evidence that alcohol can affect your brain permanently and not reverse once you become sober again. Long term effects include memory issues and some reduced cognitive function.19) Eyewitness accounts of criminal suspects is usually only about 50 percent accurate because it is difficult for your brain to remember the details of someone you’re not familiar with. Can also affect the brains ability to remember details.20) Computer or may help improve cognitive abilities. However, more studies must be conducted to learn how much they help or what types of games help.21) Your brain uses 20 percent of the oxygen and blood in your body.