Stimulate the hand function

The myoelectrical signal , is recorded using surface electrodes. It is used to control electrical stimulation of the same muscle (and/or oth

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This project aims to develop an open-source assistive or therapeutic device that restores motor function lost due to upper motor neuron lesions, allowing users to have direct control over their movements. The device utilizes muscle signals, which generate weak electrical signals when the muscle contracts, even if it is partially paralyzed. Additionally, the muscle can be electrically stimulated to contract. By combining these principles, the device enables the muscle to directly enhance its contraction and achieve a greater range of movement. This concept is particularly relevant when the muscle or limb is affected by an upper motor neuron lesion, as it allows for stimulation of the motor nerve. The project focuses on translating scientific research into a practical solution specifically for hand function. Detailed documentation can be found on GitHub for more comprehensive information about this complex project.

People with tetraplegia are often lacking grip strength, causing impairment in activities of daily living. For them, improving hand function is a priority because it is important for autonomy and participation in daily life. A tendon transfer surgery may be an option to improve the tenodesis grip, but it is an invasive procedure. Alternatively a similar effect can be produced, using a non-invasive method which can be efficient for enhancing grip strength, using a one channel research prototype with wired connections to surface electrodes.

Important notice: This circuit has high voltages reaching 320V. It can provoke serious electric shock if not handled carefully. It is currently not ready for people without 

Disclaimer: The technology described involves the use of high-voltage stimulation, which can potentially cause physiological harm if not used with extreme caution and under the supervision of competent individuals. None of the individual contributors, system operators, developers, or sponsors can be held responsible for the outcomes or consequences of any use or attempted use of any published information.

  • 1 × ESP32
  • 1 × Populated Stimulation & EMG recording board from PCB layout files
  • 1 × Bluetooth enabled browser

  • 1
    Step 1

    There are essentially three parts to the system

    • Software (for a host computer pc/mobile)
    • Firmware (for the embedded microprocessor)
    • Hardware (physical elements of the system)

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