Table 1 : American Spinal Injury Association Impairment Scale (AIS)*.

A	Complete
B	Sensory incomplete: sensory but not motor function is preserved below the neurological level and includes the sacral segments S4-S5
C	Motor incomplete: 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 strength
D	Motor incomplete: 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 strength
E	Normal

*From: International Standards for Neurological Classification of Spinal Cord Injury.
Available at: http://www.asia-spinalinjury.org/elearning/ASIA_ISCOS_high.pdf.
Accessed on April 21, 2016.