TABLE 1.

ASIA impairment scale

ASIA impairment scale
A	Complete. No sensory or motor function is preserved in the sacral segments S4–S5.
B	Incomplete. Sensory but not motor function is preserved below the neurologic level and includes the sacral segments S4–S5.
C	Incomplete. Motor function is preserved below the neurologic level, and more than half of the key muscles below the neurologic level have a muscle grade less than 3.
D	Incomplete. Motor function is preserved below the neurologic level, and at least half of key muscles below the neurologic level have a muscle grade greater than or equal to 3.
E	Normal. Sensory and motor function is normal.

Abbreviation: ASIA: American Spinal Injury Association.