In 2007, scientist Clyde Francks discovered a gene responsible for handedness. He named this gene LRRTM1, and he determined that it is passed down from the father. He believes this gene is responsible for making children left-handed or right-handed.
The two sides of the brain have very specific functions. According to an article published in Psychology Today, the left side of the brain is typically where we find the function of language.
The author explains that the idea of left-handed children being right-brain dominant is a myth. “Among right-handers, left-sided dominance for language approaches upwards of 95 percent prevalence.
However, among left-handed people, this drops to 70 percent, with the others either having language localized to the right hemisphere or spread evenly across both hemispheres.” Other scientific literature also finds that left-handedness does not mean right-brain dominance.
During the first year of life, babies develop rapidly. They are discovering new things, reaching, touching, and picking things up with both hands. If babies are using only one hand at this age, it might be an indication of a developmental delay or a possible neurological condition. Make sure to speak with your pediatrician if you’re concerned.
By the time that your baby reaches two to three years old, they have probably developed a preference for one hand or the other. So, how do you tell if your baby is left-handed? There are some signs of left-handedness that can be identified at this age.
One of the first signs you’ll notice is during normal daily activities like eating. If you place a bowl and spoon in front of your left-handed toddler, they will support the bowl with their right hand (non-dominant) and eat with their spoon in their left hand (dominant).
As your left-handed baby gets older, you will notice that they will stir food or drinks in a clockwise direction. They will begin to color and draw with their left hand and tend to kick a ball with their left foot. You will start to notice that as they get older and develop fine motor skills, they will use their left hand more each day.