I am left-handed.
Why am I left-handed? As humans evolved it is likely that there were changes in the brain that resulted in most humans preferring to use their right hands, while at the same time maintaining a stable minority that prefers to do things with their left hand…perhaps early humans started to communicate with their hands first, and only developed spoken language later.
As a left-hander I have less brain lateralization than right-handed people (meaning that the two halves of the brain are less distinct than in right-handers).
Looking at my motor cortex (a brain region involved in movement): it is activated to control my left hand.
As a left hander I hear rapidly changing sounds more easily than right handers. The left hemisphere, which controls the right hand, likes rapidly changing sounds like consonants, while the right hemisphere, which controls the left hand, likes slowly changing sounds, like syllables or intonation
And I differ in how I how I judge positive and negative attributes of things (in terms of honesty and intelligence).
As a left hander I am more affected by fear than right handers. I am more prone to having negative emotions and more difficulty in processing my feelings, because of an imbalance of activity between the left and right hemispheres when trying to process moodiness. And I am more likely to feel inhibited, shy and embarrased.
By the way: August 13 is International Left-Hander’s Day.
The advantages of me being left handed (compared to right handed) include being better at sport, being able to multi-task, having better memory, being good at using both sides of my brain for face perception, and being more likely to be artistic (being more visual than language based).
Also I can be a faster typist: on a standard qwerty keyboard there are about 3400 words that can be typed solely with the left hand, compared to about 450 words typed solely with the right hand.
I am starting to feel grateful for being in the minority!!
Tell us something most people probably don’t know about you.