Table 2. The American Spinal Injury Association/International Spinal Cord Society Neurological Standard Scale (Better known as the “ASIA Impairment Scale”)¹³ .

ASIA Impairment Scale		Lesion
A	No motor or sensory function is preserved in the sacral segments S4–S5	Complete
B	Sensory but not motor function is preserved below the neurological level and includes the sacral segments S4–S5	Incomplete
C	Motor function is preserved below the neurological level, and more than half of key muscles below the neurological level have a muscle grade less than 3	Incomplete
D	Motor function is preserved below the neurological level, and at least half of key muscles below the neurological level have a muscle grade of 3 or more	Incomplete
E	Motor and sensory functions are normal	Normal