People who have them are more likely to have other disturbances. One of the few things I recall clearly from embryology in med school is that any disturbance of

People who have them are more likely to have other disturbances. One of the few things I recall clearly from embryology in med school is that any disturbance of the midline and sided structures of the body often reflects some abnormal development: there's rarely only one (e.g., if their brain is abnormal, you had better look for cardiac abnormalities). Left-handedness is unusual, but not per se pathologic. There is a running joke among neurologists that the average neurologist is a left-handed person with migraines. They aren't all, of course, but if you had chronic headaches and were left-handed, wouldn't that predispose you to pursuing a specialty where you try to figure out what's going on in brains? I majored in chemistry; it's not a huge stretch to imagine why I became an anesthesiologist. It's interesting, and it makes some intuitive sense. We tend to be more of the "analyst" personality; former engineers and accountants are not rare in anesthesia.