McCormick Neurologic Scale used to characterize neurological status.
| Grade | Description |
| I | Neurological status intact, ambulating normally, minimal dysesthesia |
| II | Mild sensory of motor deficit, functioning independently |
| III | Moderate deficit, some limitation of function, maintains independence with external aid |
| IV | Severe sensory or motor deficit, function very limited, dependent on others |
| V | Paraplegia or quadriplegia, even in presence of flickering movement |