Somatosensory Dysfunction as the Underlying Mechanism of Upper Limbs Motor Blocks in People With Parkinson's Disease

"Local vibration will be applied using a custom-made vibratory system (named Vibrators) consisted of small vibratory devices (constructed using DC micro motors (Faulhaber® - Switzerland) bearing an eccentric load, enclosure on a PVC involucre). Vibrators measure 4.5cm x 2cm x 2cm and weight 27-31g each. Vibrators were custom-made especially for this study and therefore do not have a trade name.~Vibrators will be positioned either on the extensor carpi radialis brevis (ECRB) muscle belly or on the olecranon region. Devices will be kept in place using regular elbow elastic supports."