Wuehr M, et al. - In patients with primary orthostatic tremor (OT), experts studied the effects of proprioceptive leg muscle stimulation via muscle tendon vibration (MTV) on tremor and balance control. They assessed tremor characteristics by frequency domain analysis of surface EMG recordings from four leg muscles. Using posturographic recordings, body sway was analyzed. They reported that proprioceptive stimulation did not reset tremor frequency consistent with the presumed central origin of OT, however, continuous MTV influenced the emergence of OT symptoms resulting in decreased tremor intensity, improved posture, and a relief from unsteadiness in half of the examined patients. It was observed in the findings that MTV either directly interferes with the peripheral manifestation of the central oscillatory pattern or prevents proprioceptive afferent feedback from becoming extensively synchronized at the tremor frequency.