When analyzing the handedness of both groups together, the overall medial laterality score remained 87.5(interquartile range: 30.2). One hundred and twenty-one subjects acknowledged to practicing fine motor skills beyond the required amount at school. Median duration of fine motor practice was 1 h per week (interquartile range:3.5). 72 subjects (i.e. 37.9% of the whole sample) played a musical instrument at the time of assessment.