How do prosthetic limbs and rehabilitation devices help restore mobility?

Prosthetic limbs and rehabilitation devices restore mobility by substituting for lost functions or by retraining the nervous system to regain control over movement.1

Prosthetic Limbs

Prostheses serve as artificial substitutes for missing body parts, such as arms or legs. Modern biomedical engineering enhances these devices using lightweight materials like carbon fiber and 3D printing for customized fits. Advanced prosthetics often incorporate microprocessors and myoelectrical control systems, which use electrodes to amplify electrical signals from a patient's own muscle contractions, allowing for more natural movement and feedback.23

Rehabilitation Devices

Rehabilitation robots facilitate recovery through two primary approaches:
* Assistive Robots: These devices, such as robotic arms mounted on wheelchairs, act as tools to perform tasks for individuals with impaired physical functioning.1
* Therapy Robots: These tools aid patients in practicing movements. For example, the Lokomat supports a patient's weight while guiding the legs in a walking pattern on a treadmill, helping to retrain the nervous system after a stroke or spinal cord injury.1

These technologies leverage neuroplasticity, as the brain can adapt to incorporate tools or prosthetic limbs into its internal body image.4