10 Easy Brain Enhancing Questions

The following questions and answers were excerpted from the book Your Brain, The Missing Manual
Also, be sure to check out Basic Tips for Mental Fitness from Your Brain: The Missing Manual

Q: Turkey is one of the best things to eat if you want to promote sleepiness.
A: False: Turkey may be loaded with tryptophan, the amino acid that can cause drowsiness, but it has no more of it than many other high protein food items like chicken, beef, and soybeans. Plus, eating high protein meals without a corresponding truckload of carbohydrates ensures that tryptophan will never enter the blood-brain barrier.

Q: The REM (for "Rapid Eye Movement") stage of sleep, when the most vivid dreaming usually happens, occurs during the deepest stages of the dream cycle.
A: False: REM sleep actually occurs at the very end of the sleep cycle, when the brain returns to a much lighter stage of sleep.

Q: Contrary to conventional wisdom, memories are not "stored" in the brain as recordings or as discrete "data", but are instead the result of the brain's constant rewiring of neuronal connections.
A: True: There's no static "memory storage" in the brain, but instead a fluid, constantly readapting process of establishing, reinforcing, and fading links between neurons.

Q: Despite huge life changes that temporarily create radical shifts in personal fortune (either good or bad), the brain will always drift back to an inborn "happiness" set point.
A: True: Regardless of whether you win the lotto or suffer catastrophic tragedy, you'll always return to the same chipper or grumpy temperament that sustains throughout your life.

Q: With most traits, heritability (the influence of genetics) decreases through childhood and adolescence, reaching its lowest point in adulthood.
A: False: The reverse is true--genetic links actually get stronger with age (meaning you're more similar to your parents as an adult than as a child), though there is no scientific consensus as to why this is so.

Q: T/F: IQ scores are highly heritable
A: True, page 242

Q: Your brain's energy use is roughly:
a.) 20 watts
b.) 40 watts
c.) 75 watts
A: 20 watts--enough to power a dim light bulb, page 29

Q: Microsleep is a phenomenon that occurs when the brain?
A: Shuts off for a second or two usually due to lack of sleep, page 52

Q: The art of improving memory is called?
A: Mnemonics, page 107

Q: T/F: Chronically sleep-deprived individuals have a greater incidence of obesity?
A: True, page 40