The Reason Behind 'Terrible Two' Behavior

I've mentioned in the past - at least I think I have - that I enjoy receiving weekly newsletters from Isis Parenting.  I found a portion of this week's update to be very interesting, informative, even comforting.  Take a look at the reason behind "terrible two" behavior:

Emotional growth and brain hemisphere

You may have heard of someone who was described as being "right-brained" or "left-brained" at one time or another. It's true that the different sides of the brain control different functions that make up the emotional and behavioral things we do. It's also true that in toddlers, the left and right brains grow at different rates at different times, almost in an alternating pattern. Since the right side of the brain controls a great deal of emotion and emotional growth, don't be surprised if your toddler is sometimes a model of good behavior and happiness and sometimes a "terrible two." As the sides of her brain alternate in their development, her behavior and emotions will follow.