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Orthosis for Improvement of Arm Function in C5/C6 Tetraplegia

People with spinal cord injury at the C5/C6 motor complete level typically have relatively well-preserved biceps function but minimal or no voluntary control of triceps. The authors previously have shown the lack of voluntary control of triceps results in deficiencies in speed and accuracy of elbow movements as well as reduction in reachable workspace. The authors also have shown these deficiencies can be corrected by the addition of constant extensor torque at the elbow. The purpose of this article is to describe a prototype constant-torque elbow orthosis and illustrate the improvements in function it affords people with C5/C6 tetraplegia.