How to Check for Cubital Tunnel Syndrome

In terms of pronation and supination, make sure to check this with the shoulders fully adducted in the elbow at 90 degrees. Testing elbow extension primarily tests the triceps which receives innervation by C7. In cubital tunnel syndrome one may note a weak pinch. This is from loss of thumb adduction which may be as much as 70% of pinch strength that is lost.