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ASIA Impairment Scale (AIS).
| Grade | Features |
|---|---|
| A | Complete injury. No sensory or motor function below the NLI |
| B | Incomplete injury. Only sensory function below the NLI |
| C | Incomplete injury. Motor strength < 3 and sensory function below the NLI |
| D | Incomplete injury. Motor strength ≥ 3 and sensory function below the NLI |
| E | Normal exam |
