How the MyoPro Myoelectric Upper Limb Orthosis Works


The MyoPro® is a Myoelectric Arm Orthosis designed to support a weak or deformed arm. The MyoPro can enable individuals to self-initiate and control movements of a partially paralyzed or weakened arm using their own muscle signals. When the user tries to bend their arm, sensors in the brace detect the weak muscle signal, which activates the motor to move the arm in the desired direction. The user is completely controlling their own arm; the brace amplifies their weak muscle signal to help bend and move their arm. With the orthosis, a paralyzed individual, such as one who has suffered a brachial plexus injury, stroke or other neuromuscular disorder can perform activities of daily living including feeding, reaching and lifting.

Introducing the MyoPro Motion-G Elbow-Wrist-Hand Orthosis. The MyoPro Motion-G is the next generation of the MyoPro myelectric upper extremity orthoses and combines myoelectrically driven 3-jaw chuck grasp with the current myoelectric elbow and manually articulated wrist system. It is designed to increase functional capability for the user by enabling partial finger movement and resulting hand control.


The MyoPro Motion-G orthosis is designed to help individuals with upper extremity paresis regain the ability to perform ADLs through the addition of grasp and release.
  • Empowers a user to complete additional functional tasks by enabling grasping of objects along with elbow flexion and extension
  • Promotes independent activity and safety through functional assistance
  • How It Works

    The MyoPro Motion-G orthosis is based on decades of work in myoelectric orthotics and prosthetics and represents the state of the art in functional orthotics for individuals with upper extremity paresis. Sensors built into the custom device detect the EMG signal in the affected arm in four locations - bicep/tricep and the forearm flexor/extensor muscle groups. These signals are amplified when a user initiates movement, driving small motors which allow the individual to extend/flex their elbow and open/close their thumb and fingers. The wrist can be manually positioned and controlled in flexion/extension and pronation/supination.

    Clinical Criteria

    The MyoPro Motion-G may provide functional benefit for individuals with hemiparesis.  Other criteria include:
    • Ambulatory
    • Viable proximal and distal EMG signal
    • Appropriate passive range of motion
      • Wrist extends to neutral position or further
      • Hand and fingers to full extension
    • Intact cognition

    The MyoPro® Motion W™ can now provide 4 degree of freedom movement. This is accomplished using a myoelectric driven motorized elbow joint along with a manually set multi-articulating wrist. The multi-articulating wrist extends the functional benefits of the MyoPro orthosis and can provide the following clinical benefits:
    • Flexion / extension, radial / ulnar deviation
    • Rotation - pronation / supination
    • Allows the user to have multi-axial movement at the wrist
    • Adjustable ratcheting and tension for each degree of freedom

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