A breakthrough surgical procedure

Targeted Muscle Reinnervation, or TMR, allows individuals with upper-arm amputation to gain a more sophisticated control of their prosthesis. Nerves found in the residual upper arm or shoulder that previously controlled the amputated portion of the arm and hand are transplanted (reassigned) to a target muscle, such as the pectoral muscle, that is operational but no longer performs its primary function due to the amputation. These reassigned nerves then transfer their control to the targeted muscle, relaying signals to the brain. 

Retraining the brain

Following the procedure, rehabilitation involves strengthening those electrical signals and training the individual to channel those signals into intuitive movement of their prosthesis using just their thoughts.

Are you a candidate for TMR?

Following a medical review, OHSU's targeted muscle reinnervation team can determine if you are eligible for this type of procedure. In general, the following criteria must be met: 

• Amputation above the elbow or at the shoulder within the last 10 years
• Stable soft tissue at the point of amputation
• Willingness to participate in rehabilitation