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Muscles that Move the Arm

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Self-Contained Neuromusculoskeletal Arm Prostheses.

Max Ortiz-Catalan¹, Enzo Mastinu¹, Paolo Sassu¹

¹From the Biomechatronics and Neurorehabilitation Laboratory, Department of Electrical Engineering, Chalmers University of Technology (M.O.-C., E.M.), the Department of Hand Surgery, Sahlgrenska University Hospital (P.S.), and the Department of Orthopedics, Gothenburg University (R.B.) - all in Gothenburg, Sweden; the Clinical Laboratory for Bionic Extremity Reconstruction, Division of Plastic and Reconstructive Surgery, Medical University of Vienna, Vienna (O.A.); and the Center for Extreme Bionics, Biomechatronics Group, MIT Media Lab, Massachusetts Institute of Technology, Cambridge (R.B.).

The New England Journal of Medicine

|April 30, 2020

Summary

This summary is machine-generated.

This study shows a bone-anchored robotic arm provides intuitive control and sensory feedback for transhumeral amputation patients. Long-term use improved daily function and sensory perception.

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Area of Science:

Biomedical Engineering
Rehabilitation Medicine
Neuroprosthetics

Background:

Transhumeral amputation presents challenges for restoring natural limb function.
Osseointegration offers a stable anchor for advanced prosthetic devices.
Bidirectional communication is key for intuitive prosthetic control and sensory feedback.

Observation:

Four patients with transhumeral amputation used a bone-anchored, self-contained robotic arm for 3-7 years.
The robotic arm featured integrated sensory and motor components.
Osseointegration anchored the device to the humerus, enabling direct bone cell attachment.

Findings:

The prosthetic arm allowed intuitive control based on user intent, without formal training.
Bidirectional communication between the prosthetic hand and implanted electrodes facilitated movement and sensory feedback.
Daily use led to enhanced sensory acuity and improved effectiveness in daily activities.

Implications:

This technology offers a promising avenue for restoring function after upper limb amputation.
Osseointegration combined with advanced robotics can lead to more natural and intuitive prosthetic use.
Further research could refine sensory feedback and motor control for improved patient outcomes.