Hand Lab Projects

Development of Therapeutic Devices to Assist Finger Extension

Rehabilitation Engineering Research Center

We test the efficacy of therapeutic training with mechanically- powered  and pneumatically-controlled devices that assist finger extension.  We use these devices in conjunction with virtual reality environments with hope they will stimulate recovery of hand function. 

Modeling of the Index Finger

Department of Veteran Affairs Grant

We are interested in developing a dynamic, 3D model of the index finger to facilitate the study of motor control and to predict the effects of potential therapeutic interventions. The equations of motion have been computed symbolically.

We have recently completed some 2D simulations of FDS and FDP contraction:

• finger flexion without passive stiffness & damping
• same simulation with passive stiffness & damping
  

  CyberGlove. We evaluate finger kinematics using a
  CyberGlove. (Virtual Technologies, Inc.). The glove permits
  measurement of 20 degrees-of-freedom in the digits. We are
  interested in the pattern of finger motion during grasp,
  as well as the portion of the attainable workspace.

  

  Force Measurement. Fingertip forces are measured using
  a 6 DOF from JR 3. The finger is attached to the load cell
  using the 4 - screw clamp system shown.

  Technology promoting upper extremity function in stroke survivors

  Rehabilitation Research and Training Center

  We are developing an orthotic system to facilitate reaching and grasping in individuals with hemiplegia subsequent to stroke. The arm orthosis will provide compensation for gravitational loading of the arm, thereby reducing the force necessary to move the arm. The hand orthosis will bias the hand toward an extended posture to compensate for excessive active flexor tone. A fixed wrist orthosis will maintain a constant wrist angle. The system will be comprised of entirely passive components, so that it can readily be used in home, community, or work environments.