Grade | Type of injury | Description of injury |
A | Complete | No sensory or motor function is preserved in the sacral segments S4 - S5. |
B | Sensory Incomplete | Sensory but not motor function is preserved below the neurological level and includes the sacral segments S4-S5, AND no motor function is preserved more than three levels below the motor level on either side of the body. |
C | Motor Incomplete | Motor function is preserved below the neurological level AND more than half of key muscle functions below the neurological level of injury have a muscle grade less than 3 (Grades 0 - 2). |
D | Motor Incomplete | Motor function is preserved below the neurological level AND at least half (half or more) of key muscle functions below NLI have a muscle grade 3 or more. |
E | Normal | If sensation and motor function as tested with ISNCSCI are graded as normal in all segments AND the patient had prior deficits then the AIS Grade is E. |
Someone without a Spinal Cord Injury does not receive an AIS Grade. |