INVERTED SUPINATOR SIGN FOR CERVICAL MYELOPATHY According to Cook et al. (2009), the Inverted Supinator Sign has a sensitivity of 61% and a specificity of 78% in the detection of cervical cord compression. Like the Hoffmann's sign, it does not have a huge clinical impact as a stand-alone test, but is helpful when used in conjuction with other tests. Again, if you suspect CSM, this needs to be discussed with the patient's GP or specialist as surgery might be necessary to prevent irreversible dama