The ASIA classification of neurologic impairment
| ASIA Grade | Description |
|---|---|
| A | No motor or sensory function preserved in the sacral segments |
| B | Sensory but not motor function preserved in at least the sacral segments |
| C | Motor function preserved below the neurologic level and most key muscles have motor score <3 |
| D | Motor function preserved below the neurologic level and most key muscles have a motor score of ≥3 |
| E | Motor and sensory function is normal. |
Note.—ASIA indicates American Spinal Injury Association. Adapted from Ditunno (6).