Breaking the train of thought is something that's happened to everyone at least once, and is likely to happen to them more often than they care for. It isn't so much that they're unable to focus on whatever task was at hand, or that they need to start taking ADHD medication. Medical science says that those are unlikely, seeing as how it happens to just about everybody at one point or another. However, for the longest time, science hasn't really looked into what makes the human mind suddenly go off and wander into a direction that is opposite from what it was on just a moment before. Mainstream psychology simply hasn't paid all that much attention to it up until recently, when some realized that this odd habit of the human mind was ?too common to ignore.?

What does this bode for students who can't keep their eyes on their books or for people who face then prospect of growing up on ADHD medication, you may ask? Nobody's sure yet, but most theorize that a better understanding of how human beings pay attention to things and how they get distracted might help provide a better picture of what ADHD does to the developing brain. After all, if people are thinking about something else while doing something they're supposed to be focusing on 30% of the time, there better be some sort of scientific data explaining why this is happening.

It should be noted that mind-wandering is neither a sign that someone needs to sign up for ADHD medication or that there's something wrong. The fact is, this sort of thing is perfectly natural and, once in a while, taking one's mind off of a problem and focusing on something else might help. However, it should be noted that there have also been instances when this has not been so good. Studies have found that, in most of the cases where this sort of thing happens, the mind wanders off to rather mundane areas. Mental to-do lists, normal activities, and other little, unexciting things are what seem to make the mind wander the most, and not things like fantasies or worries. However, medical science and modern psychology have absolutely no idea what makes the brain do this, or why it happens on such a frequent basis.

The most comprehensive study that looked into this found data implying that these random trips into random topics seem to stem from the same mechanisms of the brain that kick in when our minds are on ?idle? mode. In other words, the parts that take over when we're thinking about nothing are the same parts that kick in when the mind swerves to a completely different topic. There are some that theorize that the brain wanders because, for the most part, it functions on autopilot for daily activities and needs something to occupy it from time to time. Others believe it is an internally programmed form of stress relief, or a mechanism for long-term planning. Of course, there are also others that believe that the mind wanders simply because it can.