Inclusion Criteria:

• Adult (≥ 18 years of age) traumatic brachial plexus injury (BPI) patients who underwent spinal accessory nerve or intercostal nerves transfer to musculocutaneous nerve or branch to biceps from Jan 1 2010 to Dec 31 2020.
• Once consented, they will be given an appointment to return to the Mayo Clinic Brachial Plexus clinic for a physical follow-up to undergo a standard post nerve reconstruction evaluation.  For patients who consented but are not able to travel to Mayo Clinic for a physical review, a virtual consult will be scheduled. 

Exclusion Criteria: 

• Patients less than 18 years old and those with brachial plexus palsy resulting from birth injury, compressive neuropathy, resection of tumors, cervical spine surgery, radiation therapy, inflammatory or auto-immune conditions will be excluded.

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 1/11/23. Questions regarding updates should be directed to the study team contact.