🧘 Neuroimaging study shows traditional Buddhist meditation tunes out external distractions

From the article:

Traditional Buddhist meditations are associated with reduced attention towards external stimuli, a new study published in the International Journal of Psychophysiology finds. This correlates with the Buddhist principle of gradually withdrawing from sensory-focused levels of consciousness — which are connected to the five senses.


“Each participant was 25 to 80 years of age, right- handed, and did not have any hearing disabilities, injuries, previous concussions, or neurological disorders”

I wonder why the article mentioned that they were right handed? Does being left handed or using both hands alter the brain waves?