Common
| | | | | |
Median | Carpal tunnel | +++ | +++ | + | EMG not usually needed |
Ulnar | Elbow (cubital tunnel) | + | +++ | ++ | |
Uncommon
| | | | | |
Radial | Upper arm | + | ++ | +++ | |
Axillary | Humeral head | NA | NA | ++ | |
Ulnar | Wrist (Guyon’s canal) or hand | + | ++ | +++ | Depends on other ulnar studies being normal |
Long thoracic | Not clear | NA | NA | ++ | Limited usefulness; small risk of pneumothorax |
Rare
| | | | | |
Anterior interosseous branch of median nerve | Just below the elbow | NA | NA | ++ | Depends on other median studies being normal |
Posterior interosseous branch of radial nerve | As nerve enters supinator muscle | NA | NA | ++ | Depends on other radial nerve studies being normal |
Suprascapular | Suprascapular notch | NA | + | +++ | |
Musculocutaneous | | NA | + | ++ | |