[Contribution to the study of laterality in professional musicians]

Left-handed professional musicians percentage is not significantly different from normal population, excepted for piano, organ and harpsichord players. For these instruments the melody is always written for the right hand, probably because of the location of the frequencies which are the most easily perceived by the human ear on the right part of the keyboard. Thus for a lefthanded musician to play piano is comparable to write with his right hand, and as a consequence leads him to play an other instrument for his professional activity.