 - Exclusion Criteria include: 1burn survivors with an area of scar of less than fifty percent of the CFU of interest, 2 burn survivors with a history of orthopedic trauma to the upper extremity i.e. sprain within the last 24 months, history of fracture, or history of joint dislocation, 3 control subjects with a history of upper extremity trauma or injury, 4 control subjects with the presence of scar tissue covering an area of more than one percent of the CFU of interest, 5 any potential subject with a history or rheumatoid arthritis, osteoarthritis affecting the extremity of interest, peripheral nerve injury of the extremity of interest, or systemic disorder affecting joint range of motion of the upper extremity. 