Rett Syndrome and Music

http://www.coastmusictherapy.com/articles/diagnosisrett.html

Music, rhythm, and musical instruments are of significant interest and motivation to girls with Rett syndrome and have been used successfully in preliminary studies to increase their responsiveness in areas such as hand use, communication, choice making, activation of augmentative devices, and self-regulation.

See research references here:

http://www.coastmusictherapy.com/articles/diagnosisrett.html