Grade B | Incomplete: Sensory but not motor function is preserved below the neurological level and includes the sacral segments S4–S5 |
Grade C | Incomplete: Motor function is preserved below the neurological level, and more than half of key muscles below the neurological level have a muscle grade <3 |
Grade D | Incomplete: Motor function is preserved below the neurological level, and at least half of key muscles below the neurological level have a muscle grade ≥3 |
Grade E | Normal: Sensory and motor function is normal |