TABLE 1.

American Spinal Cord Injury Association impairment scale (AIS).

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 the NLI have a muscle grade ≥ 3
E	Normal	If sensation and motor function as tested with the ISNCSCI are graded as normal in all segments and the patient had prior deficits Then the AIS Grade is E.