The patented gripper features a mate colour ball on the top which is used for tracking the gripper translating arm movements to the system. It also incorporated a pressure sensor facing forward for finger rehabilitation.
The platform’s gripper for upper extremity rehabilitation has a main hollow plastic body that provides structural support, a pressure sensor in the front and a resting zone in the posterior for ergonomic handling. The gripper
is complemented with communication electronics to transmit grip strength and an USB interface for power supply. The gripper further incorporates a sphere made of matte material for visual identification. For those patients too paretic to hold the gripper an additional support has been designed. This support is affixed to the forearm and ensures the patient holds the gripper safely and further permits correction of the wrist position with respect to the forearm during the execution of the rehabilitation exercises. All clinical trials have been carried out with this gripper.
We have recently added a new finger controller for specific hand training shown in Figure 5c. The finger trainer is positioned at the end of an arm and wrist resting platform. The controller incorporates four rings where fingers are inserted and which allow finger flexion and extension. A special rest for the thumb facilitates proper holding of the controller. The height of the controller can be adjusted by means of a set of stackable cushions that further add comfort for usage and rest for the wrist. The finger controller has not yet been tested in clinical trials.