http://medicalxpress.com/news/2012-0...s-disease.html
...Bartel and his team in the new Music and Health Research Collaboratory (MaHRC) are exploring the medical effects of low frequency sound and have shown that this therapy can play a key role in reducing the symptoms of Parkinson’s disease.
Vibroacoustic therapy (VAT) consists of low sound frequencies that are transmitted to the body and mind through special transducers that convert the sound to inner body massage. MaHRC associates Heidi Ahonen and Quincy Almeida treated two groups of Parkinson’s patients (20 with dominant tremor symptoms and 20 with slow/rigid movement symptoms) with five minutes of 30 Hz vibration.
Both groups showed improvements in all symptoms, including less rigidity and better walking speed with bigger steps and less tremor...
..."Also known is that 40 Hz brain waves seem to be carriers of information between the parts of the brain that control movement. So adding extra stimulation in that zone should help that communication and so assist in movement control.”...